Powerdns
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Denial of service in PowerDNS Authoritative Server (4.9.0 before 4.9.15 and 5.0.0 before 5.0.5) arises from concurrency and locking defects in the GSS-TSIG code path, allowing a remote attacker to crash or hang the server (CVSS 7.5, availability-only impact). No public exploit identified at time of analysis, and EPSS is very low (0.02%, 6th percentile), with CISA's SSVC framework rating exploitation as 'none' and technical impact as 'partial'. Vendor patches are available, and exposure is limited to deployments that have the GSS-TSIG feature enabled.
Remote denial of service in PowerDNS Authoritative Server arises from insufficient validation of SOA queries received via the Autoprimary (formerly 'supermaster') replication mechanism, allowing unauthenticated network-based attackers to disrupt service availability. The flaw carries a CVSS 7.5 (AV:N/AC:L/PR:N/UI:N) with availability-only impact, and no public exploit identified at time of analysis. The OX-reported issue is documented in PowerDNS Security Advisory 2026-06.
Denial of service in PowerDNS Authoritative DNS server (versions 4.9.0-4.9.14 and 5.0.0-5.0.4) arises from insufficient validation of names processed during AXFR zone transfers, letting a malicious or compromised primary send crafted zone data that disrupts availability. The CVSS 3.1 base score is 8.6 with a scope change (S:C) and availability-only impact (A:H), and no public exploit has been identified at time of analysis. EPSS is 0.00% and CISA SSVC rates exploitation as 'none', indicating no observed real-world attacks despite the high score.
Remote attackers can corrupt PowerDNS Authoritative Server configuration via specially crafted DNS NOTIFY requests, causing persistent denial of service requiring manual administrator intervention. The attack adds malformed secondary domains to the bind backend, rendering the configuration invalid and preventing the server from restarting. No active exploitation confirmed at time of analysis, but the network-accessible attack vector and lack of authentication requirements elevate risk for internet-facing authoritative DNS servers.
Remote denial of service in dnsdist allows unauthenticated attackers to crash the DNS load balancer by sending specially crafted DNSCrypt queries that trigger a divide-by-zero error. The vulnerability requires no authentication, low attack complexity, and directly impacts service availability for all DNS traffic routed through affected dnsdist instances. Organizations using DNSCrypt protocol support in dnsdist face immediate risk of service disruption from remote attackers.
DNSdist instances using custom Lua code can be crashed via denial of service when the DNSQuestion:getEDNSOptions method accesses a modified DNS packet, triggering a use-after-free condition. This affects DNSdist across all versions and requires network access to send crafted DNS queries, but the attack demands specific Lua code patterns and high attack complexity; no public exploit or active exploitation has been confirmed, and the real-world impact is limited to environments where custom Lua DNS query handlers reference EDNS options.
DNSdist fails to validate packet size bounds when rewriting DNS questions or responses via Lua methods (DNSQuestion:changeName, DNSResponse:changeName), allowing unauthenticated remote attackers to craft DNS responses that trigger out-of-bounds writes and exceed the 65535-byte DNS packet size limit, resulting in denial of service via crash. CVSS 5.9 (high availability impact); no public exploit code identified at time of analysis.
Memory exhaustion in DNSdist allows remote, unauthenticated attackers to trigger denial of service by crafting malicious DNS over QUIC or DNS over HTTP/3 payloads that force excessive memory allocation. The attack causes the QUIC connection to close abnormally, and in systems with limited memory reserves, can force out-of-memory conditions that terminate the DNSdist process entirely.
Out-of-bounds read in PowerDNS dnsdist allows unauthenticated remote attackers to trigger denial of service or potential information disclosure by sending a crafted DNS response packet when custom Lua code uses the newDNSPacketOverlay function to parse packets. CVSS 5.3 indicates moderate severity with network-accessible attack surface and no privilege or user interaction required.
DNSSEC validation is bypassed in PowerDNS Recursor when wildcard-synthesized answers are CNAME or DNAME record types, allowing an attacker positioned to inject forged DNS responses to circumvent cryptographic integrity guarantees. Wildcard expansion proofs - the NSEC or NSEC3 records that DNSSEC uses to prove a wildcard match is legitimate - are accepted by the recursor without verifying their signatures in this specific code path. No public exploit code has been identified at time of analysis, and EPSS data was not provided; however, the bypass of DNSSEC undermines a core trust mechanism used by resolvers to reject forged DNS data.
TTL capping bypass in PowerDNS Recursor enables ghost domain NS record injection when a slow authoritative server response arrives after the cached NS entry has already expired. Specifically, the proactive background refresh mechanism fails to cap TTLs on NS record responses when no live cache entry exists at response time, allowing attacker-controlled TTL values to persist uncapped in the recursor's cache. No active exploitation has been identified (no CISA KEV listing), no public exploit code exists, and the CVSS score of 3.7 reflects the constrained, timing-dependent nature of this attack.
DNS response manipulation in PowerDNS Recursor 5.4.x allows network-positioned attackers to inject false DNS records through insufficient validation of answers received from authoritative servers, resulting in low-integrity violations in name resolution for downstream clients. The 5.4.x branch received hardening patches per PowerDNS advisory 2026-08 to close this validation gap. No public exploit has been identified at time of analysis and the vulnerability is not listed in the CISA KEV catalog.
DNSSEC validation in PowerDNS Recursor can be silently undermined by network-positioned attackers who spoof DNS replies to trick the Recursor into permanently marking a legitimate authoritative server's IP as EDNS-incapable. Once that state is poisoned, the Recursor is unable to perform proper DNSSEC validation for any zones served by that authoritative server, effectively disabling a critical security layer for downstream clients. No active exploitation has been confirmed by CISA KEV, and no public proof-of-concept has been identified at time of analysis; however, the attack complexity is rated High due to the spoofing prerequisite.
ZONEMD validation bypass in PowerDNS Recursor allows a cryptographically invalid DNS zone to be accepted as legitimate when ZoneToCache is configured with ZONEMD validation enabled. This undermines the integrity guarantee that ZONEMD is designed to provide - an attacker capable of serving a crafted zone to the resolver (e.g., via a rogue authoritative source or network interception) can cause the recursor to cache and serve tampered DNS data. No public exploit code has been identified and exploitation is not confirmed in CISA KEV; real-world risk is constrained by the non-default configuration prerequisite.
PowerDNS Recursor crashes when processing a malformed SOA record within a catalog zone, resulting in a denial of service for all DNS resolution handled by the affected instance. The CVSS vector (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H) confirms network-reachable unauthenticated exploitation, but high attack complexity reflects the non-default catalog zone configuration required. No public exploit identified at time of analysis, and the vulnerability is not listed in the CISA KEV catalog.
PowerDNS Recursor crashes when a malicious authoritative DNS server serves a crafted zone via the ZoneToCache function, exploiting insufficient input validation to cause a denial of service. The CVSS vector (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H) confirms this is a remotely triggerable availability-only impact, though high attack complexity reflects the prerequisite of controlling or compromising an authoritative name server in the resolution path. No public exploit code has been identified at time of analysis, and no KEV listing exists, but the impact on DNS infrastructure availability makes this a meaningful operational risk for affected deployments.
Improper packet cache handling in PowerDNS Recursor causes ECS zero-scoped DNS answers to be stored in the cache when they should be discarded or handled as global entries, creating an information disclosure pathway. All Recursor versions (cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*) are affected, but only deployments with EDNS Client Subnet (ECS) explicitly enabled are exposed. The CVSS score of 5.3 with a network vector and no required privileges reflects that any DNS client can trigger the improper caching behavior, though real-world impact is bounded by the non-default ECS configuration requirement. No public exploit code has been identified and the vulnerability is not listed in the CISA KEV catalog.
PowerDNS Authoritative Server's optional internal web server accepts crafted HTTP requests that trigger unbounded memory allocation, exhausting process memory and causing a denial of service against the DNS service. Exploitation requires low-privilege authentication (PR:L per CVSS vector) and the internal web server must be explicitly enabled - it is disabled by default, sharply limiting the real-world attack surface. No public exploit code has been identified and this vulnerability is not listed in CISA KEV.
Incorrect view selection in PowerDNS Authoritative Server when processing TCP PROXY protocol requests exposes DNS records intended for a different network segment to remote unauthenticated attackers, producing both unauthorized information disclosure and limited integrity impact. Deployments running split-horizon DNS via the Views feature alongside TCP PROXY protocol support are the specific affected population. No public exploit has been identified at time of analysis, and active exploitation has not been confirmed by CISA KEV; however, the attack concept requires no authentication and no user interaction, making it relevant wherever both features are co-deployed.
Catalog zone transfer failure in PowerDNS Authoritative can be triggered by a high-privileged remote attacker who injects insufficiently validated member zone data, causing the catalog zone transfer mechanism to abort and preventing secondary nameservers from receiving zone updates. The impact is a targeted denial-of-service against DNS zone replication infrastructure, affecting any deployment using catalog zones (RFC 9432). No public exploit has been identified at time of analysis, and the vulnerability is not listed in CISA KEV.
PowerDNS Authoritative server allows authenticated REST API operators to inject malformed HTTPS or SVCB record data, corrupting the LMDB backend database and causing service degradation or denial of availability. The vulnerability requires high-privilege REST API access and affects deployments using LMDB as the backend storage engine, with confirmed impact on data integrity and availability.
Denial of service in PowerDNS secondary servers occurs when a rogue primary server sends crafted DNS update requests that cause file descriptor exhaustion on the secondary, eventually rendering the secondary unable to process legitimate DNS queries. The attack requires network-level coordination between a compromised or attacker-controlled primary server and a target secondary server, with moderate attack complexity due to the need to establish a primary-secondary relationship. No active exploitation has been confirmed in CISA KEV at time of analysis.
Incomplete LDAP query escaping in PowerDNS Authoritative with 8bit-dns enabled allows authenticated users to enumerate internal domain subtrees through LDAP injection, leading to information disclosure of sensitive DNS zone data. The vulnerability requires valid authentication, high attack complexity due to LDAP protocol constraints, and has been reported by the vendor security team. No active exploitation data is currently available.
DNSdist is vulnerable to denial of service via out-of-bounds write when processing crafted UDP responses from a rogue backend server. An attacker controlling a backend DNS server can send a specially crafted UDP response with a query ID set off-by-one from the maximum configured value, triggering memory corruption that crashes the DNS forwarder. The CVSS score of 6.5 reflects network attack vector with high complexity and absence of confidentiality impact, though availability and integrity are affected.
dnsdist's Discovery of Designated Resolvers (DDR) upgrade mechanism allows a rogue backend to send a crafted SVCB response that causes a denial of service via availability impact when DDR is explicitly enabled through the autoUpgrade (Lua) or auto_upgrade (YAML) configuration options. The vulnerability requires adjacent network access and high complexity exploitation conditions, affecting only deployments that have manually enabled DDR functionality-a non-default configuration.
Out-of-bounds memory read in dnsdist allows remote attackers to trigger information disclosure or denial of service when custom Lua code invokes getDomainListByAddress() or getAddressListByDomain() functions on a crafted packet cache entry. The vulnerability requires network access but has high attack complexity, limiting real-world exploitation despite the remote attack vector.
Denial of service in dnsdist via crafted PRSD (PowerDNS Response Detection) queries causes assertion failure and service disruption on remote DNS resolvers. The vulnerability requires specific network conditions and crafted packet construction (AC:H) but affects default configurations without authentication. CVSS 3.7 reflects low availability impact with non-trivial exploitation complexity.
dnsdist can experience a denial-of-service condition through query-response mismatching when a client sends precisely timed floods of queries routed to TCP-only or DNS over TLS backends. An adjacent network attacker with high timing precision can cause limited availability impact by desynchronizing the query-response correlation on affected backends, though exploitation requires favorable network conditions and careful query timing. This issue carries a low CVSS score (3.1) reflecting the high attack complexity and adjacency requirement.
dnsdist allows remote denial-of-service attacks through memory exhaustion by generating numerous error responses on single DoQ (DNS-over-QUIC) and DoH3 (DNS-over-HTTPS/3) connections. An unauthenticated remote attacker can trigger excessive memory allocation by rapidly sending queries that produce error responses, with resources not properly released until connection termination. CVSS 5.3 (AV:N/AC:L/PR:N/UI:N) reflects network-accessible availability impact; no public exploit identified at time of analysis.
dnsdist can be forced into excessive memory allocation when a client generates high volumes of DNS queries routed to an overloaded DNS-over-HTTPS (DoH) backend, causing queries to accumulate in an unbounded buffer that persists until connection closure. This denial-of-service condition affects dnsdist deployments with DoH backends under load, allowing unauthenticated remote attackers to exhaust server memory with sustained query traffic.
DNSdist allows remote attackers to create unlimited concurrent DoQ (DNS over QUIC) or DoH3 (DNS over HTTPS/3) connections, triggering unbounded memory allocation and denial of service. The vulnerability affects configurations where these protocols are explicitly enabled, as both are disabled by default. No authentication is required for exploitation, and CVSS 5.3 (AC:L, AV:N) indicates straightforward network-based triggering under default conditions.
Denial of service in PowerDNS Recursor via null pointer dereference in the zoneToCache function when processing zone data from a malicious authoritative server. Affects Recursor 5.2.0 through 5.4.0 and requires high privileges and non-standard network conditions to exploit, resulting in service availability impact but not data compromise. Patch available from vendor.
Null pointer dereference in PowerDNS Recursor allows remote attackers to trigger a denial of service by sending crafted DNS replies that bypass a missing consistency check. The vulnerability affects Recursor versions 5.2.0 through 5.2.8, 5.3.0 through 5.3.5, and 5.4.0, with CVSS 5.9 reflecting high availability impact but requiring special network conditions (AC:H). No public exploit code identified at time of analysis.
PowerDNS Recursor versions 5.2.x, 5.3.x, and 5.4.0 are vulnerable to denial of service when processing a zone transition from NSEC to NSEC3 DNSSEC record types, causing internal inconsistency and resolver unavailability. The vulnerability requires network access but elevated attack complexity, affecting recursive DNS resolvers in production environments. Vendor patches are available for all affected branches.
Denial of service in PowerDNS Authoritative, Recursor, and dnsdist via unbounded memory allocation in their internal web servers when processing specially crafted web requests. Multiple product lines are affected across several version ranges. The internal web server is disabled by default, significantly limiting real-world exposure. A vendor-released patch is available. CVSS 5.3 (low severity) with network-accessible vector but no authentication required reflects the ease of exploitation offset by the availability limitation and DoS-only impact.
PowerDNS Recursor versions 5.2.0-5.2.8, 5.3.0-5.3.5, and 5.4.0 suffer denial of service and potential data corruption when a malfunctioning RPZ provider causes concurrent transfers of the same RPZ zone, leading to use-after-free conditions, inconsistent zone data, and recursor crashes. The vulnerability requires high privilege attacker control over an RPZ provider and non-standard network conditions, resulting in availability and integrity impact with a CVSS score of 5.0.
Denial of service in PowerDNS Recursor allows remote unauthenticated attackers to exhaust resolver memory by publishing and querying crafted DNS zones that trigger excessive allocation in the negative and aggressive NSEC(3) caches. The vulnerability affects Recursor versions 5.2.0-5.2.8, 5.3.0-5.3.5, and 5.4.0, with a CVSS score of 5.3 reflecting low severity due to availability impact only (no code execution or data breach). Vendor-released patches are available.
Unlimited memory allocation in PowerDNS internal web server allows remote denial of service via crafted web requests. The vulnerability affects multiple PowerDNS products (dnsdist, Authoritative, and Recursor) across multiple versions, though the internal web server is disabled by default, significantly limiting real-world exposure. CVSS 5.3 reflects low attack complexity and no authentication requirements, but the default-disabled state and requirement to enable the internal web server substantially reduce practical risk.
Denial of service via unlimited memory allocation in PowerDNS Recursor's internal web server affects versions 5.2.0-5.2.8, 5.3.0-5.3.5, and 5.4.0. An unauthenticated remote attacker can send a crafted web request to exhaust server memory when the internal web server is enabled, causing service unavailability. No public exploit code or active exploitation has been identified, but patch versions are available from the vendor.
Denial of service in PowerDNS Recursor occurs when processing a malicious Response Policy Zone (RPZ) from an authoritative server, triggering a null pointer dereference due to missing validation logic. Versions 5.2.0-5.2.8, 5.3.0-5.3.5, and 5.4.0 are affected. An authenticated remote attacker controlling an authoritative nameserver can crash the Recursor service by sending a specially crafted RPZ response, requiring high privilege level (PR:H) and complex attack conditions (AC:H) as mitigating factors.
PowerDNS dnsdist allows unauthenticated DNS over HTTPS (DoH) queries to bypass access control lists when the early_acl_drop option is disabled on nghttp2 frontends, exposing the DNS resolver to unauthorized query submission and potential information disclosure. Affected versions include dnsdist across multiple releases where this configuration weakness exists; the vulnerability has a CVSS score of 6.5 and exposes both confidentiality and integrity concerns despite not affecting availability.
Cross-Origin Resource Sharing (CORS) misconfiguration in PowerDNS dnsdist's internal webserver allows remote attackers to extract sensitive configuration information from the dashboard through a social engineering attack targeting authenticated administrators. An attacker can trick an admin into visiting a malicious website, which then leverages the misconfigured CORS policy to read dashboard API responses containing running configuration details. The vulnerability requires the internal webserver to be enabled (disabled by default) and user interaction, resulting in limited confidentiality impact with no integrity or availability risk.
HTML injection in DNSdist internal web dashboard allows remote unauthenticated attackers to inject malicious content via crafted DNS queries when domain-based dynamic rules are enabled, requiring user interaction to exploit. This affects all DNSdist versions with vulnerable rule functionality and carries low integrity impact with no confidentiality or availability consequences.
Crafted zones can lead to increased incoming network traffic. [CVSS 5.3 MEDIUM]
DNS recursive resolver denial-of-service via crafted zones and CNAME chain manipulation allows unauthenticated attackers to exhaust server resources and potentially poison the resolver's cache. The vulnerability affects Recursor instances exposed to untrusted DNS queries, enabling attackers to degrade performance or compromise DNS resolution integrity. No patch is currently available.
Crafted delegations or IP fragments can poison cached delegations in Recursor. [CVSS 6.5 MEDIUM]
Crafted delegations or IP fragments can poison cached delegations in Recursor. [CVSS 8.2 HIGH]
Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.6.5, through 4.7.4 , through 4.8.3. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A remote attacker might be able to cause infinite recursion in PowerDNS Recursor 4.8.0 via a DNS query that retrieves DS records for a misconfigured domain, because QName minimization is used in QM. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PowerDNS Recursor up to and including 4.5.9, 4.6.2 and 4.7.1, when protobuf logging is enabled, has Improper Cleanup upon a Thrown Exception, leading to a denial of service (daemon crash) via a DNS. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
In PowerDNS Authoritative Server before 4.4.3, 4.5.x before 4.5.4, and 4.6.x before 4.6.1 and PowerDNS Recursor before 4.4.8, 4.5.x before 4.5.8, and 4.6.x before 4.6.1, insufficient validation of an. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by sending a specific query (QTYPE 65535) that causes an out-of-bounds exception. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue has been found in PowerDNS Recursor before 4.1.18, 4.2.x before 4.2.5, and 4.3.x before 4.3.5. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in PowerDNS Authoritative through 4.3.0 when --enable-experimental-gss-tsig is used. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in PowerDNS Authoritative through 4.3.0 when --enable-experimental-gss-tsig is used. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in PowerDNS Authoritative through 4.3.0 when --enable-experimental-gss-tsig is used. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
An issue has been found in PowerDNS Authoritative Server before 4.3.1 where an authorized user with the ability to insert crafted records into a zone might be able to leak the content of. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
In PowerDNS Recursor versions up to and including 4.3.1, 4.2.2 and 4.1.16, the ACL restricting access to the internal web server is not properly enforced. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PowerDNS Recursor from 4.1.0 up to and including 4.3.0 does not sufficiently defend against amplification attacks. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue has been found in PowerDNS Recursor 4.1.0 through 4.3.0 where records in the answer section of a NXDOMAIN response lacking an SOA were not properly validated in SyncRes::processAnswer,. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PowerDNS Authoritative daemon , pdns versions 4.0.x before 4.0.9, 4.1.x before 4.1.11, exiting when encountering a serial between 2^31 and 2^32-1 while trying to notify a slave leads to DoS. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A Vulnerability has been found in PowerDNS Authoritative Server before versions 4.1.9, 4.0.8 allowing a remote, authorized master server to cause a high CPU load or even prevent any further updates. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. This Allocation of Resources Without Limits vulnerability could allow attackers to exhaust system resources through uncontrolled allocation.
A vulnerability has been found in PowerDNS Authoritative Server before versions 4.1.10, 4.0.8 allowing an authorized user to cause the server to exit by inserting a crafted record in a MASTER type. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.
A vulnerability was found in PowerDNS Authoritative Server before 4.0.7 and before 4.1.7. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
An issue has been found in PowerDNS Recursor versions 4.1.x before 4.1.9 where records in the answer section of responses received from authoritative servers with the AA flag not set were not. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue has been found in PowerDNS Recursor versions after 4.1.3 before 4.1.9 where Lua hooks are not properly applied to queries received over TCP in some specific combination of settings, possibly. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
An issue has been found in PowerDNS Recursor before version 4.1.8 where a remote attacker sending a DNS query can trigger an out-of-bounds memory read while computing the hash of the query for a. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PowerDNS Authoritative Server 4.1.0 up to 4.1.4 inclusive and PowerDNS Recursor 4.0.0 up to 4.1.4 inclusive are vulnerable to a packet cache pollution via crafted query that can lead to denial of. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PowerDNS Authoritative Server 3.3.0 up to 4.1.4 excluding 4.1.5 and 4.0.6, and PowerDNS Recursor 3.2 up to 4.1.4 excluding 4.1.5 and 4.0.9, are vulnerable to a memory leak while parsing malformed. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue has been found in PowerDNS DNSDist before 1.3.3 allowing a remote attacker to craft a DNS query with trailing data such that the addition of a record by dnsdist, for example an OPT record. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
An issue has been found in PowerDNS Recursor from 4.0.0 up to and including 4.1.4. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
pdns before version 4.1.2 is vulnerable to a buffer overflow in dnsreplay. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity.
Improper input validation bugs in DNSSEC validators components in PowerDNS version 4.1.0 allow attacker in man-in-the-middle position to deny existence of some data in DNS via packet replay. Rated low severity (CVSS 3.7), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
dnsdist version 1.1.0 is vulnerable to a flaw in authentication mechanism for REST API potentially allowing CSRF attack. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Improper Authentication vulnerability could allow attackers to bypass authentication mechanisms to gain unauthorized access.
PowerDNS (aka pdns) Authoritative Server before 4.0.1 allows remote primary DNS servers to cause a denial of service (memory exhaustion and secondary DNS server crash) via a large (1) AXFR or (2). Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable, no authentication required. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.
PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Epss exploitation probability 85.5% and no vendor patch available.
PowerDNS (aka pdns) Authoritative Server before 3.4.10 allows remote attackers to cause a denial of service (backend CPU consumption) via a long qname. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Epss exploitation probability 37.0%.
PowerDNS (aka pdns) Authoritative Server 3.4.4 before 3.4.7 allows remote attackers to cause a denial of service (assertion failure and server crash) via crafted query packets. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity.
The label decompression functionality in PowerDNS Recursor before 3.6.4 and 3.7.x before 3.7.3 and Authoritative (Auth) Server before 3.3.3 and 3.4.x before 3.4.5 allows remote attackers to cause a. Rated high severity (CVSS 7.8), this vulnerability is remotely exploitable, low attack complexity.
The label decompression functionality in PowerDNS Recursor 3.5.x, 3.6.x before 3.6.3, and 3.7.x before 3.7.2 and Authoritative (Auth) Server 3.2.x, 3.3.x before 3.3.2, and 3.4.x before 3.4.4 allows. Rated high severity (CVSS 7.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
PowerDNS Recursor before 3.6.2 does not limit delegation chaining, which allows remote attackers to cause a denial of service ("performance degradations") via a large or infinite number of referrals,. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Unspecified vulnerability in PowerDNS Recursor (aka pdns_recursor) 3.6.x before 3.6.1 allows remote attackers to cause a denial of service (crash) via an unknown sequence of malformed packets. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity.
The resolver in PowerDNS Recursor (aka pdns_recursor) 3.3 overwrites cached server names and TTL values in NS records during the processing of a response to an A record query, which allows remote. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
common_startup.cc in PowerDNS (aka pdns) Authoritative Server before 2.9.22.5 and 3.x before 3.0.1 allows remote attackers to cause a denial of service (packet loop) via a crafted UDP DNS response. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity.
Denial of service in PowerDNS Authoritative Server (4.9.0 before 4.9.15 and 5.0.0 before 5.0.5) arises from concurrency and locking defects in the GSS-TSIG code path, allowing a remote attacker to crash or hang the server (CVSS 7.5, availability-only impact). No public exploit identified at time of analysis, and EPSS is very low (0.02%, 6th percentile), with CISA's SSVC framework rating exploitation as 'none' and technical impact as 'partial'. Vendor patches are available, and exposure is limited to deployments that have the GSS-TSIG feature enabled.
Remote denial of service in PowerDNS Authoritative Server arises from insufficient validation of SOA queries received via the Autoprimary (formerly 'supermaster') replication mechanism, allowing unauthenticated network-based attackers to disrupt service availability. The flaw carries a CVSS 7.5 (AV:N/AC:L/PR:N/UI:N) with availability-only impact, and no public exploit identified at time of analysis. The OX-reported issue is documented in PowerDNS Security Advisory 2026-06.
Denial of service in PowerDNS Authoritative DNS server (versions 4.9.0-4.9.14 and 5.0.0-5.0.4) arises from insufficient validation of names processed during AXFR zone transfers, letting a malicious or compromised primary send crafted zone data that disrupts availability. The CVSS 3.1 base score is 8.6 with a scope change (S:C) and availability-only impact (A:H), and no public exploit has been identified at time of analysis. EPSS is 0.00% and CISA SSVC rates exploitation as 'none', indicating no observed real-world attacks despite the high score.
Remote attackers can corrupt PowerDNS Authoritative Server configuration via specially crafted DNS NOTIFY requests, causing persistent denial of service requiring manual administrator intervention. The attack adds malformed secondary domains to the bind backend, rendering the configuration invalid and preventing the server from restarting. No active exploitation confirmed at time of analysis, but the network-accessible attack vector and lack of authentication requirements elevate risk for internet-facing authoritative DNS servers.
Remote denial of service in dnsdist allows unauthenticated attackers to crash the DNS load balancer by sending specially crafted DNSCrypt queries that trigger a divide-by-zero error. The vulnerability requires no authentication, low attack complexity, and directly impacts service availability for all DNS traffic routed through affected dnsdist instances. Organizations using DNSCrypt protocol support in dnsdist face immediate risk of service disruption from remote attackers.
DNSdist instances using custom Lua code can be crashed via denial of service when the DNSQuestion:getEDNSOptions method accesses a modified DNS packet, triggering a use-after-free condition. This affects DNSdist across all versions and requires network access to send crafted DNS queries, but the attack demands specific Lua code patterns and high attack complexity; no public exploit or active exploitation has been confirmed, and the real-world impact is limited to environments where custom Lua DNS query handlers reference EDNS options.
DNSdist fails to validate packet size bounds when rewriting DNS questions or responses via Lua methods (DNSQuestion:changeName, DNSResponse:changeName), allowing unauthenticated remote attackers to craft DNS responses that trigger out-of-bounds writes and exceed the 65535-byte DNS packet size limit, resulting in denial of service via crash. CVSS 5.9 (high availability impact); no public exploit code identified at time of analysis.
Memory exhaustion in DNSdist allows remote, unauthenticated attackers to trigger denial of service by crafting malicious DNS over QUIC or DNS over HTTP/3 payloads that force excessive memory allocation. The attack causes the QUIC connection to close abnormally, and in systems with limited memory reserves, can force out-of-memory conditions that terminate the DNSdist process entirely.
Out-of-bounds read in PowerDNS dnsdist allows unauthenticated remote attackers to trigger denial of service or potential information disclosure by sending a crafted DNS response packet when custom Lua code uses the newDNSPacketOverlay function to parse packets. CVSS 5.3 indicates moderate severity with network-accessible attack surface and no privilege or user interaction required.
DNSSEC validation is bypassed in PowerDNS Recursor when wildcard-synthesized answers are CNAME or DNAME record types, allowing an attacker positioned to inject forged DNS responses to circumvent cryptographic integrity guarantees. Wildcard expansion proofs - the NSEC or NSEC3 records that DNSSEC uses to prove a wildcard match is legitimate - are accepted by the recursor without verifying their signatures in this specific code path. No public exploit code has been identified at time of analysis, and EPSS data was not provided; however, the bypass of DNSSEC undermines a core trust mechanism used by resolvers to reject forged DNS data.
TTL capping bypass in PowerDNS Recursor enables ghost domain NS record injection when a slow authoritative server response arrives after the cached NS entry has already expired. Specifically, the proactive background refresh mechanism fails to cap TTLs on NS record responses when no live cache entry exists at response time, allowing attacker-controlled TTL values to persist uncapped in the recursor's cache. No active exploitation has been identified (no CISA KEV listing), no public exploit code exists, and the CVSS score of 3.7 reflects the constrained, timing-dependent nature of this attack.
DNS response manipulation in PowerDNS Recursor 5.4.x allows network-positioned attackers to inject false DNS records through insufficient validation of answers received from authoritative servers, resulting in low-integrity violations in name resolution for downstream clients. The 5.4.x branch received hardening patches per PowerDNS advisory 2026-08 to close this validation gap. No public exploit has been identified at time of analysis and the vulnerability is not listed in the CISA KEV catalog.
DNSSEC validation in PowerDNS Recursor can be silently undermined by network-positioned attackers who spoof DNS replies to trick the Recursor into permanently marking a legitimate authoritative server's IP as EDNS-incapable. Once that state is poisoned, the Recursor is unable to perform proper DNSSEC validation for any zones served by that authoritative server, effectively disabling a critical security layer for downstream clients. No active exploitation has been confirmed by CISA KEV, and no public proof-of-concept has been identified at time of analysis; however, the attack complexity is rated High due to the spoofing prerequisite.
ZONEMD validation bypass in PowerDNS Recursor allows a cryptographically invalid DNS zone to be accepted as legitimate when ZoneToCache is configured with ZONEMD validation enabled. This undermines the integrity guarantee that ZONEMD is designed to provide - an attacker capable of serving a crafted zone to the resolver (e.g., via a rogue authoritative source or network interception) can cause the recursor to cache and serve tampered DNS data. No public exploit code has been identified and exploitation is not confirmed in CISA KEV; real-world risk is constrained by the non-default configuration prerequisite.
PowerDNS Recursor crashes when processing a malformed SOA record within a catalog zone, resulting in a denial of service for all DNS resolution handled by the affected instance. The CVSS vector (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H) confirms network-reachable unauthenticated exploitation, but high attack complexity reflects the non-default catalog zone configuration required. No public exploit identified at time of analysis, and the vulnerability is not listed in the CISA KEV catalog.
PowerDNS Recursor crashes when a malicious authoritative DNS server serves a crafted zone via the ZoneToCache function, exploiting insufficient input validation to cause a denial of service. The CVSS vector (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H) confirms this is a remotely triggerable availability-only impact, though high attack complexity reflects the prerequisite of controlling or compromising an authoritative name server in the resolution path. No public exploit code has been identified at time of analysis, and no KEV listing exists, but the impact on DNS infrastructure availability makes this a meaningful operational risk for affected deployments.
Improper packet cache handling in PowerDNS Recursor causes ECS zero-scoped DNS answers to be stored in the cache when they should be discarded or handled as global entries, creating an information disclosure pathway. All Recursor versions (cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*) are affected, but only deployments with EDNS Client Subnet (ECS) explicitly enabled are exposed. The CVSS score of 5.3 with a network vector and no required privileges reflects that any DNS client can trigger the improper caching behavior, though real-world impact is bounded by the non-default ECS configuration requirement. No public exploit code has been identified and the vulnerability is not listed in the CISA KEV catalog.
PowerDNS Authoritative Server's optional internal web server accepts crafted HTTP requests that trigger unbounded memory allocation, exhausting process memory and causing a denial of service against the DNS service. Exploitation requires low-privilege authentication (PR:L per CVSS vector) and the internal web server must be explicitly enabled - it is disabled by default, sharply limiting the real-world attack surface. No public exploit code has been identified and this vulnerability is not listed in CISA KEV.
Incorrect view selection in PowerDNS Authoritative Server when processing TCP PROXY protocol requests exposes DNS records intended for a different network segment to remote unauthenticated attackers, producing both unauthorized information disclosure and limited integrity impact. Deployments running split-horizon DNS via the Views feature alongside TCP PROXY protocol support are the specific affected population. No public exploit has been identified at time of analysis, and active exploitation has not been confirmed by CISA KEV; however, the attack concept requires no authentication and no user interaction, making it relevant wherever both features are co-deployed.
Catalog zone transfer failure in PowerDNS Authoritative can be triggered by a high-privileged remote attacker who injects insufficiently validated member zone data, causing the catalog zone transfer mechanism to abort and preventing secondary nameservers from receiving zone updates. The impact is a targeted denial-of-service against DNS zone replication infrastructure, affecting any deployment using catalog zones (RFC 9432). No public exploit has been identified at time of analysis, and the vulnerability is not listed in CISA KEV.
PowerDNS Authoritative server allows authenticated REST API operators to inject malformed HTTPS or SVCB record data, corrupting the LMDB backend database and causing service degradation or denial of availability. The vulnerability requires high-privilege REST API access and affects deployments using LMDB as the backend storage engine, with confirmed impact on data integrity and availability.
Denial of service in PowerDNS secondary servers occurs when a rogue primary server sends crafted DNS update requests that cause file descriptor exhaustion on the secondary, eventually rendering the secondary unable to process legitimate DNS queries. The attack requires network-level coordination between a compromised or attacker-controlled primary server and a target secondary server, with moderate attack complexity due to the need to establish a primary-secondary relationship. No active exploitation has been confirmed in CISA KEV at time of analysis.
Incomplete LDAP query escaping in PowerDNS Authoritative with 8bit-dns enabled allows authenticated users to enumerate internal domain subtrees through LDAP injection, leading to information disclosure of sensitive DNS zone data. The vulnerability requires valid authentication, high attack complexity due to LDAP protocol constraints, and has been reported by the vendor security team. No active exploitation data is currently available.
DNSdist is vulnerable to denial of service via out-of-bounds write when processing crafted UDP responses from a rogue backend server. An attacker controlling a backend DNS server can send a specially crafted UDP response with a query ID set off-by-one from the maximum configured value, triggering memory corruption that crashes the DNS forwarder. The CVSS score of 6.5 reflects network attack vector with high complexity and absence of confidentiality impact, though availability and integrity are affected.
dnsdist's Discovery of Designated Resolvers (DDR) upgrade mechanism allows a rogue backend to send a crafted SVCB response that causes a denial of service via availability impact when DDR is explicitly enabled through the autoUpgrade (Lua) or auto_upgrade (YAML) configuration options. The vulnerability requires adjacent network access and high complexity exploitation conditions, affecting only deployments that have manually enabled DDR functionality-a non-default configuration.
Out-of-bounds memory read in dnsdist allows remote attackers to trigger information disclosure or denial of service when custom Lua code invokes getDomainListByAddress() or getAddressListByDomain() functions on a crafted packet cache entry. The vulnerability requires network access but has high attack complexity, limiting real-world exploitation despite the remote attack vector.
Denial of service in dnsdist via crafted PRSD (PowerDNS Response Detection) queries causes assertion failure and service disruption on remote DNS resolvers. The vulnerability requires specific network conditions and crafted packet construction (AC:H) but affects default configurations without authentication. CVSS 3.7 reflects low availability impact with non-trivial exploitation complexity.
dnsdist can experience a denial-of-service condition through query-response mismatching when a client sends precisely timed floods of queries routed to TCP-only or DNS over TLS backends. An adjacent network attacker with high timing precision can cause limited availability impact by desynchronizing the query-response correlation on affected backends, though exploitation requires favorable network conditions and careful query timing. This issue carries a low CVSS score (3.1) reflecting the high attack complexity and adjacency requirement.
dnsdist allows remote denial-of-service attacks through memory exhaustion by generating numerous error responses on single DoQ (DNS-over-QUIC) and DoH3 (DNS-over-HTTPS/3) connections. An unauthenticated remote attacker can trigger excessive memory allocation by rapidly sending queries that produce error responses, with resources not properly released until connection termination. CVSS 5.3 (AV:N/AC:L/PR:N/UI:N) reflects network-accessible availability impact; no public exploit identified at time of analysis.
dnsdist can be forced into excessive memory allocation when a client generates high volumes of DNS queries routed to an overloaded DNS-over-HTTPS (DoH) backend, causing queries to accumulate in an unbounded buffer that persists until connection closure. This denial-of-service condition affects dnsdist deployments with DoH backends under load, allowing unauthenticated remote attackers to exhaust server memory with sustained query traffic.
DNSdist allows remote attackers to create unlimited concurrent DoQ (DNS over QUIC) or DoH3 (DNS over HTTPS/3) connections, triggering unbounded memory allocation and denial of service. The vulnerability affects configurations where these protocols are explicitly enabled, as both are disabled by default. No authentication is required for exploitation, and CVSS 5.3 (AC:L, AV:N) indicates straightforward network-based triggering under default conditions.
Denial of service in PowerDNS Recursor via null pointer dereference in the zoneToCache function when processing zone data from a malicious authoritative server. Affects Recursor 5.2.0 through 5.4.0 and requires high privileges and non-standard network conditions to exploit, resulting in service availability impact but not data compromise. Patch available from vendor.
Null pointer dereference in PowerDNS Recursor allows remote attackers to trigger a denial of service by sending crafted DNS replies that bypass a missing consistency check. The vulnerability affects Recursor versions 5.2.0 through 5.2.8, 5.3.0 through 5.3.5, and 5.4.0, with CVSS 5.9 reflecting high availability impact but requiring special network conditions (AC:H). No public exploit code identified at time of analysis.
PowerDNS Recursor versions 5.2.x, 5.3.x, and 5.4.0 are vulnerable to denial of service when processing a zone transition from NSEC to NSEC3 DNSSEC record types, causing internal inconsistency and resolver unavailability. The vulnerability requires network access but elevated attack complexity, affecting recursive DNS resolvers in production environments. Vendor patches are available for all affected branches.
Denial of service in PowerDNS Authoritative, Recursor, and dnsdist via unbounded memory allocation in their internal web servers when processing specially crafted web requests. Multiple product lines are affected across several version ranges. The internal web server is disabled by default, significantly limiting real-world exposure. A vendor-released patch is available. CVSS 5.3 (low severity) with network-accessible vector but no authentication required reflects the ease of exploitation offset by the availability limitation and DoS-only impact.
PowerDNS Recursor versions 5.2.0-5.2.8, 5.3.0-5.3.5, and 5.4.0 suffer denial of service and potential data corruption when a malfunctioning RPZ provider causes concurrent transfers of the same RPZ zone, leading to use-after-free conditions, inconsistent zone data, and recursor crashes. The vulnerability requires high privilege attacker control over an RPZ provider and non-standard network conditions, resulting in availability and integrity impact with a CVSS score of 5.0.
Denial of service in PowerDNS Recursor allows remote unauthenticated attackers to exhaust resolver memory by publishing and querying crafted DNS zones that trigger excessive allocation in the negative and aggressive NSEC(3) caches. The vulnerability affects Recursor versions 5.2.0-5.2.8, 5.3.0-5.3.5, and 5.4.0, with a CVSS score of 5.3 reflecting low severity due to availability impact only (no code execution or data breach). Vendor-released patches are available.
Unlimited memory allocation in PowerDNS internal web server allows remote denial of service via crafted web requests. The vulnerability affects multiple PowerDNS products (dnsdist, Authoritative, and Recursor) across multiple versions, though the internal web server is disabled by default, significantly limiting real-world exposure. CVSS 5.3 reflects low attack complexity and no authentication requirements, but the default-disabled state and requirement to enable the internal web server substantially reduce practical risk.
Denial of service via unlimited memory allocation in PowerDNS Recursor's internal web server affects versions 5.2.0-5.2.8, 5.3.0-5.3.5, and 5.4.0. An unauthenticated remote attacker can send a crafted web request to exhaust server memory when the internal web server is enabled, causing service unavailability. No public exploit code or active exploitation has been identified, but patch versions are available from the vendor.
Denial of service in PowerDNS Recursor occurs when processing a malicious Response Policy Zone (RPZ) from an authoritative server, triggering a null pointer dereference due to missing validation logic. Versions 5.2.0-5.2.8, 5.3.0-5.3.5, and 5.4.0 are affected. An authenticated remote attacker controlling an authoritative nameserver can crash the Recursor service by sending a specially crafted RPZ response, requiring high privilege level (PR:H) and complex attack conditions (AC:H) as mitigating factors.
PowerDNS dnsdist allows unauthenticated DNS over HTTPS (DoH) queries to bypass access control lists when the early_acl_drop option is disabled on nghttp2 frontends, exposing the DNS resolver to unauthorized query submission and potential information disclosure. Affected versions include dnsdist across multiple releases where this configuration weakness exists; the vulnerability has a CVSS score of 6.5 and exposes both confidentiality and integrity concerns despite not affecting availability.
Cross-Origin Resource Sharing (CORS) misconfiguration in PowerDNS dnsdist's internal webserver allows remote attackers to extract sensitive configuration information from the dashboard through a social engineering attack targeting authenticated administrators. An attacker can trick an admin into visiting a malicious website, which then leverages the misconfigured CORS policy to read dashboard API responses containing running configuration details. The vulnerability requires the internal webserver to be enabled (disabled by default) and user interaction, resulting in limited confidentiality impact with no integrity or availability risk.
HTML injection in DNSdist internal web dashboard allows remote unauthenticated attackers to inject malicious content via crafted DNS queries when domain-based dynamic rules are enabled, requiring user interaction to exploit. This affects all DNSdist versions with vulnerable rule functionality and carries low integrity impact with no confidentiality or availability consequences.
Crafted zones can lead to increased incoming network traffic. [CVSS 5.3 MEDIUM]
DNS recursive resolver denial-of-service via crafted zones and CNAME chain manipulation allows unauthenticated attackers to exhaust server resources and potentially poison the resolver's cache. The vulnerability affects Recursor instances exposed to untrusted DNS queries, enabling attackers to degrade performance or compromise DNS resolution integrity. No patch is currently available.
Crafted delegations or IP fragments can poison cached delegations in Recursor. [CVSS 6.5 MEDIUM]
Crafted delegations or IP fragments can poison cached delegations in Recursor. [CVSS 8.2 HIGH]
Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.6.5, through 4.7.4 , through 4.8.3. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A remote attacker might be able to cause infinite recursion in PowerDNS Recursor 4.8.0 via a DNS query that retrieves DS records for a misconfigured domain, because QName minimization is used in QM. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PowerDNS Recursor up to and including 4.5.9, 4.6.2 and 4.7.1, when protobuf logging is enabled, has Improper Cleanup upon a Thrown Exception, leading to a denial of service (daemon crash) via a DNS. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
In PowerDNS Authoritative Server before 4.4.3, 4.5.x before 4.5.4, and 4.6.x before 4.6.1 and PowerDNS Recursor before 4.4.8, 4.5.x before 4.5.8, and 4.6.x before 4.6.1, insufficient validation of an. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by sending a specific query (QTYPE 65535) that causes an out-of-bounds exception. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue has been found in PowerDNS Recursor before 4.1.18, 4.2.x before 4.2.5, and 4.3.x before 4.3.5. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in PowerDNS Authoritative through 4.3.0 when --enable-experimental-gss-tsig is used. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in PowerDNS Authoritative through 4.3.0 when --enable-experimental-gss-tsig is used. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in PowerDNS Authoritative through 4.3.0 when --enable-experimental-gss-tsig is used. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
An issue has been found in PowerDNS Authoritative Server before 4.3.1 where an authorized user with the ability to insert crafted records into a zone might be able to leak the content of. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
In PowerDNS Recursor versions up to and including 4.3.1, 4.2.2 and 4.1.16, the ACL restricting access to the internal web server is not properly enforced. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PowerDNS Recursor from 4.1.0 up to and including 4.3.0 does not sufficiently defend against amplification attacks. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue has been found in PowerDNS Recursor 4.1.0 through 4.3.0 where records in the answer section of a NXDOMAIN response lacking an SOA were not properly validated in SyncRes::processAnswer,. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PowerDNS Authoritative daemon , pdns versions 4.0.x before 4.0.9, 4.1.x before 4.1.11, exiting when encountering a serial between 2^31 and 2^32-1 while trying to notify a slave leads to DoS. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A Vulnerability has been found in PowerDNS Authoritative Server before versions 4.1.9, 4.0.8 allowing a remote, authorized master server to cause a high CPU load or even prevent any further updates. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. This Allocation of Resources Without Limits vulnerability could allow attackers to exhaust system resources through uncontrolled allocation.
A vulnerability has been found in PowerDNS Authoritative Server before versions 4.1.10, 4.0.8 allowing an authorized user to cause the server to exit by inserting a crafted record in a MASTER type. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.
A vulnerability was found in PowerDNS Authoritative Server before 4.0.7 and before 4.1.7. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
An issue has been found in PowerDNS Recursor versions 4.1.x before 4.1.9 where records in the answer section of responses received from authoritative servers with the AA flag not set were not. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue has been found in PowerDNS Recursor versions after 4.1.3 before 4.1.9 where Lua hooks are not properly applied to queries received over TCP in some specific combination of settings, possibly. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
An issue has been found in PowerDNS Recursor before version 4.1.8 where a remote attacker sending a DNS query can trigger an out-of-bounds memory read while computing the hash of the query for a. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PowerDNS Authoritative Server 4.1.0 up to 4.1.4 inclusive and PowerDNS Recursor 4.0.0 up to 4.1.4 inclusive are vulnerable to a packet cache pollution via crafted query that can lead to denial of. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
PowerDNS Authoritative Server 3.3.0 up to 4.1.4 excluding 4.1.5 and 4.0.6, and PowerDNS Recursor 3.2 up to 4.1.4 excluding 4.1.5 and 4.0.9, are vulnerable to a memory leak while parsing malformed. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue has been found in PowerDNS DNSDist before 1.3.3 allowing a remote attacker to craft a DNS query with trailing data such that the addition of a record by dnsdist, for example an OPT record. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
An issue has been found in PowerDNS Recursor from 4.0.0 up to and including 4.1.4. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
pdns before version 4.1.2 is vulnerable to a buffer overflow in dnsreplay. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity.
Improper input validation bugs in DNSSEC validators components in PowerDNS version 4.1.0 allow attacker in man-in-the-middle position to deny existence of some data in DNS via packet replay. Rated low severity (CVSS 3.7), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
dnsdist version 1.1.0 is vulnerable to a flaw in authentication mechanism for REST API potentially allowing CSRF attack. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Improper Authentication vulnerability could allow attackers to bypass authentication mechanisms to gain unauthorized access.
PowerDNS (aka pdns) Authoritative Server before 4.0.1 allows remote primary DNS servers to cause a denial of service (memory exhaustion and secondary DNS server crash) via a large (1) AXFR or (2). Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable, no authentication required. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.
PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Epss exploitation probability 85.5% and no vendor patch available.
PowerDNS (aka pdns) Authoritative Server before 3.4.10 allows remote attackers to cause a denial of service (backend CPU consumption) via a long qname. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Epss exploitation probability 37.0%.
PowerDNS (aka pdns) Authoritative Server 3.4.4 before 3.4.7 allows remote attackers to cause a denial of service (assertion failure and server crash) via crafted query packets. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity.
The label decompression functionality in PowerDNS Recursor before 3.6.4 and 3.7.x before 3.7.3 and Authoritative (Auth) Server before 3.3.3 and 3.4.x before 3.4.5 allows remote attackers to cause a. Rated high severity (CVSS 7.8), this vulnerability is remotely exploitable, low attack complexity.
The label decompression functionality in PowerDNS Recursor 3.5.x, 3.6.x before 3.6.3, and 3.7.x before 3.7.2 and Authoritative (Auth) Server 3.2.x, 3.3.x before 3.3.2, and 3.4.x before 3.4.4 allows. Rated high severity (CVSS 7.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
PowerDNS Recursor before 3.6.2 does not limit delegation chaining, which allows remote attackers to cause a denial of service ("performance degradations") via a large or infinite number of referrals,. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Unspecified vulnerability in PowerDNS Recursor (aka pdns_recursor) 3.6.x before 3.6.1 allows remote attackers to cause a denial of service (crash) via an unknown sequence of malformed packets. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity.
The resolver in PowerDNS Recursor (aka pdns_recursor) 3.3 overwrites cached server names and TTL values in NS records during the processing of a response to an A record query, which allows remote. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
common_startup.cc in PowerDNS (aka pdns) Authoritative Server before 2.9.22.5 and 3.x before 3.0.1 allows remote attackers to cause a denial of service (packet loop) via a crafted UDP DNS response. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity.