NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp…
Priority LOW 38CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.02916 87th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2016-6173
- 2026-10-03 Alias added: GHSA-h7fr-j2jh-7mww
References
Advisory 6
- [nsd-users] 20160809 NSD 4.1.11
- [oss-security] 20160706 Malicious primary DNS servers can crash secondaries
- [dns-operations] 20160704 DNS activities in Japan
- [oss-security] 20160706 Re: Malicious primary DNS servers can crash secondaries
- http://www.nlnetlabs.nl/svn/nsd/tags/NSD_4_1_11_REL/doc/RELNOTES
- https://github.com/sischkg/xfer-limit/blob/master/README.md
More NLNETLABS Nsd vulnerabilities
- TI-2026-10532 Denial of DNS over TLS service by any DoT client CVSS 4.0HIGH 8.7
- TI-2026-10531 Heap overflow and crash with crafted SVCB RR CVSS 4.0HIGH 8.7
- TI-2026-15468 Remote TCP DoS by throttling the TCP receive window CVSS 4.0MEDIUM 6.9
- TI-2026-15894 Bypass of BLOCKED ACL items on proxy protocol port over TCP or TLS CVSS 4.0HIGH 8.2
- TI-2026-15825 Remote UDP DoS by sending multiple DNS Cookie options CVSS 4.0HIGH 8.2
- TI-2026-15293 Wrong interpretation of ACL ranges CVSS 4.0HIGH 8.2
Sources
- CVE-2016-6173 · CVE Program
- CVE-2016-6173 · NVD
- FIRST EPSS
- GHSA-h7fr-j2jh-7mww · GitHub Advisory Database · CC BY 4.0
- CVE-2016-6173 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences