Nsd
CVE-2016-6173
HIGH
Vulnerability Assessment
| Weakness |
CWE
|
| Impact | CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 3.40%. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system. |
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Alert meAnalysisAI
NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
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Technical ContextAI · show details
This vulnerability is classified under CWE-399. NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data. Affected products include: Nlnetlabs Nsd. Version information: before 4.1.11.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)CVE.org
Stack-based buffer overflow in NLnet Labs NSD's zone-file RDATA parser allows an attacker with the ability to supply a c
Loading a crafted zone file into NLnet Labs NSD can overflow a stack buffer and overwrite up to 191 bytes with attacker-
A stack-based buffer overflow in NLnet Labs NSD's parsing of SVCB/HTTPS resource records allows an attacker who can supp
Stack-based buffer overflow in NLnet Labs NSD is triggered when the daemon parses a zone file containing base64 data spl
Remote denial-of-service in NLnet Labs NSD (authoritative DNS name server) version 4.13.0 and later allows an unauthenti
Heap overflow in NLnet Labs NSD allows a malicious or compromised zone primary to corrupt memory on a secondary (slave)
NSD's proxy protocol port fails to re-evaluate BLOCKED access control list entries on the second DNS query sent over a k
NSD authoritative DNS server crashes serve child processes when receiving a crafted DNS message containing exactly 17 DN
IP range-based access control in NLnet Labs NSD is silently broken on little-endian systems due to an endianness mismatc
Zone-transfer authentication bypass in NLnet Labs NSD allows unauthorized secondaries to obtain full zone contents witho
Stack buffer overflow in NSD 4.14.0 (NLnet Labs authoritative DNS server) allows a party able to introduce zone data to
TCP window throttling in NLnet Labs NSD allows any unauthenticated remote attacker to crash individual serve child proce
Exploit-DB