Denial of Service
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
How It Works
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions. Attackers exploit asymmetry: minimal attacker effort produces disproportionate resource consumption on the target. Application-level attacks use specially crafted inputs that trigger expensive operations—a regex engine processing malicious patterns can backtrack exponentially, or XML parsers recursively expand entities until memory exhausts. Network-level attacks flood targets with connection requests or amplify traffic through reflection, but application vulnerabilities often provide the most efficient attack surface.
The attack typically begins with reconnaissance to identify resource-intensive operations or unprotected endpoints. For algorithmic complexity attacks, adversaries craft inputs hitting worst-case performance—hash collision inputs filling hash tables with collisions, deeply nested JSON triggering recursive parsing, or pathological regex patterns like (a+)+b against strings of repeated 'a' characters. Resource exhaustion attacks open thousands of connections, upload massive files to unbounded storage, or trigger memory leaks through repeated operations. Crash-based attacks target error handling gaps: null pointer dereferences, unhandled exceptions in parsers, or assertion failures that terminate processes.
Impact
- Service unavailability preventing legitimate users from accessing applications during attack duration
- Revenue loss from downtime in e-commerce, SaaS platforms, or transaction processing systems
- Cascading failures as resource exhaustion spreads to dependent services or database connections pool out
- SLA violations triggering financial penalties and damaging customer trust
- Security team distraction providing cover for data exfiltration or intrusion attempts running concurrently
Real-World Examples
CVE-2018-1000544 in Ruby's WEBrick server allowed ReDoS through malicious HTTP headers containing specially crafted patterns that caused the regex engine to backtrack exponentially, freezing request processing threads. A single attacker could saturate all available workers.
Cloudflare experienced a global outage in 2019 when a single WAF rule containing an unoptimized regex hit pathological cases on legitimate traffic spikes. The .*(?:.*=.*)* pattern exhibited catastrophic backtracking, consuming CPU cycles across their edge network until the rule was disabled.
CVE-2013-1664 demonstrated XML bomb vulnerabilities in Python's XML libraries. Attackers uploaded XML documents with nested entity definitions-each entity expanding to ten copies of the previous level. A 1KB upload could expand to gigabytes in memory during parsing, crashing applications instantly.
Mitigation
- Strict input validation enforcing size limits, complexity bounds, and nesting depth restrictions before processing
- Request rate limiting per IP address, API key, or user session with exponential backoff
- Timeout enforcement terminating operations exceeding reasonable execution windows (typically 1-5 seconds)
- Resource quotas limiting memory allocation, CPU time, and connection counts per request or tenant
- Regex complexity analysis using linear-time algorithms or sanitizing patterns to eliminate backtracking
- Circuit breakers automatically rejecting requests when error rates or latency thresholds indicate degradation
- Load balancing and autoscaling distributing traffic across instances with automatic capacity expansion
Recent CVEs (40181)
.NET Core and Visual Studio Denial of Service Vulnerability. Rated medium severity (CVSS 6.5), 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.
The OPC UA implementations (ANSI C and C++) in affected products contain an integer overflow vulnerability that could cause the application to run into an infinite loop during certificate validation. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In MtpPropertyValue of MtpProperty.h, there is a possible memory corruption due to a use after free. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
In onCreate of DeviceAdminAdd.java, there is a possible way to forcibly add a device admin due to a missing permission check. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
In bta_av_rc_msg of bta_av_act.cc, there is a possible use after free due to a logic error in the code. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
In gatt_process_prep_write_rsp of gatt_cl.cc, there is a possible privilege escalation due to a use after free. Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity.
libvips is a demand-driven, horizontally threaded image processing library. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
Buffer Overflow vulnerability in NBD80S09S-KLC v.YK_HZXM_NBD80S09S-KLC_V4.03.R11.7601.Nat.OnvifC.20230414.bin and NBD80N32RA-KL-V3 v.YK_HZXM_NBD80N32RA-KL_V4.03.R11.7601.Nat.OnvifC.20220120.bin. 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 Qubo Smart Plug 10A version HSP02_01_01_14_SYSTEM-10A, allows attackers to cause a denial of service (DoS) via Wi-Fi deauthentication. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
When calling `JS::CheckRegExpSyntax` a Syntax Error could have been set which would end in calling `convertToRuntimeErrorAndClear`. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
When `UpdateRegExpStatics` attempted to access `initialStringHeap` it could already have been garbage collected prior to entering the function, which could potentially have led to an exploitable. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
When creating a callback over IPC for showing the File Picker window, multiple of the same callbacks could have been created at a time and eventually all simultaneously destroyed as soon as one of. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
When creating a callback over IPC for showing the Color Picker window, multiple of the same callbacks could have been created at a time and eventually all simultaneously destroyed as soon as one of. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
When receiving rendering data over IPC `mStream` could have been destroyed when initialized, which could have led to a use-after-free causing a potentially exploitable crash. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Null pointer dereference when composing from a specially crafted draft message in Mutt >1.5.2 <2.2.12. Rated medium severity (CVSS 5.7), this vulnerability is remotely exploitable, low attack complexity.
Null pointer dereference when viewing a specially crafted email in Mutt >1.5.2 <2.2.12. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
QUIC connections do not set an upper bound on the amount of data buffered when reading post-handshake messages, allowing a malicious QUIC connection to cause unbounded memory growth. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Allocation of Resources Without Limits vulnerability could allow attackers to exhaust system resources through uncontrolled allocation.
Processing an incomplete post-handshake message for a QUIC connection can cause a panic. 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.
Injecting random data into the USB memory area on a General Motors (GM) Chevrolet Equinox 2021 Software. Rated medium severity (CVSS 4.6), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Issue summary: The POLY1305 MAC (message authentication code) implementation contains a bug that might corrupt the internal state of applications on the Windows 64 platform when running on newer. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
Dell Digital Delivery versions prior to 5.0.82.0 contain an Insecure Operation on Windows Junction / Mount Point vulnerability. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor, and Modem (Exynos Mobile Processor, Automotive Processor, and Modem - Exynos 9810, Exynos 9610, Exynos 9820, Exynos. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Argo CD is a declarative continuous deployment for Kubernetes. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.
go-ethereum (geth) is a golang execution layer implementation of the Ethereum protocol. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Use after free vulnerability in Panasonic KW Watcher versions 1.00 through 2.82 may allow attackers to execute arbitrary code. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
A denial-of-service issue was addressed with improved input validation. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use after free in Networks in Google Chrome prior to 116.0.5845.179 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An improper resource allocation vulnerability exists in the OAS Engine configuration management functionality of Open Automation Software OAS Platform v18.00.0072. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Git Providers can read from the wrong environment because they get the same cache directory base name in Salt masters prior to 3005.2 or 3006.2. Rated high severity (CVSS 7.8). No vendor patch available.
Improper Handling of Exceptional Conditions vulnerability in Daurnimator lua-http library allows Excessive Allocation and a denial of service (DoS) attack to be executed by sending a properly crafted. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
An issue was discovered in FRRouting FRR through 9.0. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
Use After Free in GitHub repository gpac/gpac prior to 2.3-DEV. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
Use After Free in GitHub repository vim/vim prior to 9.0.1858. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
Use After Free in GitHub repository vim/vim prior to 9.0.1857. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
Use After Free in GitHub repository vim/vim prior to 9.0.1840. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
In imgsys_cmdq, there is a possible use after free due to a missing valid range checking. Rated medium severity (CVSS 6.5), this vulnerability is low attack complexity. No vendor patch available.
In imgsys_cmdq, there is a possible out of bounds read due to a missing valid range checking. Rated medium severity (CVSS 4.2), this vulnerability is low attack complexity. No vendor patch available.
In camsys, there is a possible use after free due to a race condition. Rated medium severity (CVSS 6.4). No vendor patch available.
In pda, there is a possible use after free due to a race condition. Rated medium severity (CVSS 6.4). No vendor patch available.
In cmdq, there is a possible out of bounds read due to an incorrect status check. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity. No vendor patch available.
In wcn bsp driver, there is a possible out of bounds write due to a missing bounds check.This could lead to local denial of service with no additional execution privileges. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
In urild service, there is a possible out of bounds write due to a missing bounds check. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity. No vendor patch available.
In urild service, there is a possible out of bounds write due to a missing bounds check. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity. No vendor patch available.
In vowifiservice, there is a possible missing permission check.This could lead to local denial of service with no additional execution privileges. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
In vowifiservice, there is a possible missing permission check.This could lead to local denial of service with no additional execution privileges. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
In vowifiservice, there is a possible missing permission check.This could lead to local denial of service with no additional execution privileges. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
In vowifiservice, there is a possible missing permission check.This could lead to local denial of service with no additional execution privileges. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
In vowifiservice, there is a possible missing permission check.This could lead to local denial of service with no additional execution privileges. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
In vowifiservice, there is a possible missing permission check.This could lead to local denial of service with no additional execution privileges. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
In vowifiservice, there is a possible missing permission check.This could lead to local denial of service with no additional execution privileges. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
In vowifiservice, there is a possible missing permission check.This could lead to local denial of service with no additional execution privileges. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
Catdoc v0.95 was discovered to contain a NULL pointer dereference via the component xls2csv at src/fileutil.c. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An issue in O-RAN Software Community E2 G-Release allows attackers to cause a Denial of Service (DoS) by incorrectly initiating the messaging procedure between the E2Node and E2Term components. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Buffer Overflow vulnerability in hzeller timg v.1.5.1 and before allows a remote attacker to cause a denial of service via the 0x61200000045c address. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Integer Overflow vulnerability in mp_grow in libtom libtommath before commit beba892bc0d4e4ded4d667ab1d2a94f4d75109a9, allows attackers to execute arbitrary code and cause a denial of service (DoS). Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Integer Overflow vulnerability in RELIC before commit 421f2e91cf2ba42473d4d54daf24e295679e290e, allows attackers to execute arbitrary code and cause a denial of service in pos argument in. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Integer Overflow vulnerability in RELIC before commit 34580d840469361ba9b5f001361cad659687b9ab, allows attackers to execute arbitrary code, cause a denial of service, and escalate privileges when. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
An issue has been discovered in GitLab affecting all versions starting from 15.2 before 16.1.5, all versions starting from 16.2 before 16.2.5, all versions starting from 16.3 before 16.3.1 in which. 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 discovered in GitLab affecting all versions starting from 15.11 before 16.1.5, all versions starting from 16.2 before 16.2.5, all versions starting from 16.3 before 16.3.1. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue has been discovered in GitLab affecting all versions starting from 15.11 before 16.1.5, all versions starting from 16.2 before 16.2.5, all versions starting from 16.3 before 16.3.1. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue in hjson-java up to v3.0.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted JSON string. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An Improper Input Validation vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
NULL Pointer Dereference in GitHub repository gpac/gpac prior to 2.3-DEV. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
NULL Pointer Dereference in GitHub repository gpac/gpac prior to 2.3-DEV. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
A segmentation fault can occur in Brocade Fabric OS after Brocade Fabric OS v9.0 and before Brocade Fabric OS v9.2.0a through the passwdcfg command. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity. No vendor patch available.
GitPython is a python library used to interact with Git repositories. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An unhandled edge case in the component _sanitizedPath of ZipArchive v2.5.4 allows attackers to cause a Denial of Service (DoS) via a crafted zip file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
In Splunk Enterprise versions lower than 8.2.12, 9.0.6, and 9.1.1, an attacker can use the `printf` SPL function to perform a denial of service (DoS) against the Splunk Enterprise instance. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In Splunk Enterprise versions lower than 9.0.6 and 8.2.12, a malicious actor can send a malformed security assertion markup language (SAML) request to the `/saml/acs` REST endpoint which can cause a. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A use-after-free flaw was found in mm/mempolicy.c in the memory management subsystem in the Linux Kernel. Rated medium severity (CVSS 6.3). This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
* Buffer Overflow vulnerability in qdrant v.1.3.2 allows a remote attacker cause a denial of service via the chucnked_vectors.rs component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Use after free in MediaStream in Google Chrome prior to 116.0.5845.140 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Mathjax up to v2.7.9 was discovered to contain two Regular expression Denial of Service (ReDoS) vulnerabilities in MathJax.js via the components pattern and markdownPattern. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An arbitrary file write vulnerability exists where an authenticated, remote attacker with administrator privileges could alter logging variables to overwrite arbitrary files on the remote host with. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Xmlsoft Libxml2 v2.11.0 was discovered to contain an out-of-bounds read via the xmlSAX2StartElement() function at /libxml2/SAX2.c. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
FRRouting FRR 7.5.1 through 9.0 and Pica8 PICOS 4.3.3.2 allow a remote attacker to cause a denial of service via a crafted BGP update with a corrupted attribute 23 (Tunnel Encapsulation). Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in FRRouting FRR through 9.0. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
Buffer Overflow vulnerability in O-RAN Software Community ric-plt-lib-rmr v.4.9.0 allows a remote attacker to cause a denial of service via the packet size component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Buffer Overflow vulnerability in O-RAN Software Community ric-plt-lib-rmr v.4.9.0 allows a remote attacker to cause a denial of service via a crafted packet. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Buffer Overflow vulnerability in Libming Libming v.0.4.8 allows a remote attacker to cause a denial of service via a crafted .swf file to the makeswf function. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Out-of-bounds Write vulnerability could allow attackers to write data beyond allocated buffer boundaries leading to code execution or crashes.
GPAC v2.3-DEV-rev449-g5948e4f70-master was discovered to contain a heap-use-after-free via the gf_bs_align function at bitstream.c. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Samsung Exynos Mobile Processor and Wearable Processor 9810, 9610, 9820, 980, 850, 1080, 2100, 2200, 1280, 1380, 1330, 9110, and W920. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
ASQ in Stormshield Network Security (SNS) 4.3.15 before 4.3.16 and 4.6.x before 4.6.3 allows a crash when analysing a crafted SIP packet. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Array AG OS before 9.4.0.499 allows denial of service: remote attackers can cause system service processes to crash through abnormal HTTP operations. 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.
OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. 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.
libp2p is a networking stack and library modularized out of The IPFS Project, and bundled separately for other tools to use. 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.
An issue was discovered in Libreswan 3.x and 4.x before 4.12. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.