Knot DNS before 2.3.0 allows remote DNS servers to cause a denial of service (memory exhaustion and slave server crash) via a large zone…

Description

Knot DNS before 2.3.0 allows remote DNS servers to cause a denial of service (memory exhaustion and slave server crash) via a large zone transfer for (1) DDNS, (2) AXFR, or (3) IXFR.

Scores

EPSS (exploitation in 30 days)

2.8% · top 14% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.

Weakness

• n/a
• CWE-400 (opens in a new tab)All about CWE-400 and its CVEs

Affected products

• n/a

  • affected n/a

References (7)

• [oss-security] 20160706 Malicious primary DNS servers can crash secondaries (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• 91678 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• [dns-operations] 20160704 DNS activities in Japan (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [oss-security] 20160706 Re: Malicious primary DNS servers can crash secondaries (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adae82/NEWS (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://gitlab.labs.nic.cz/labs/knot/issues/464 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://github.com/sischkg/xfer-limit/blob/master/README.md (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2016-6171](https://trackcve.app/badge/CVE-2016-6171.svg)](https://trackcve.app/cve/CVE-2016-6171)

Record last updated 6 Aug 2024, 01:22 UTC.