High severity8.6NVD Advisory· Published Feb 9, 2017· Updated Jun 17, 2026

CVE-2016-6171

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Knot DNS/Knot DNS2 versions
cpe:2.3:a:knot-dns:knot_dns:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:knot-dns:knot_dns:*:*:*:*:*:*:*:*range: <2.3.0
- (no CPE)range: <2.3.0

Patches

Vulnerability mechanics

References

github.com/sischkg/xfer-limit/blob/master/README.mdnvdPatchThird Party Advisory
www.openwall.com/lists/oss-security/2016/07/06/3nvdMailing ListThird Party Advisory
www.openwall.com/lists/oss-security/2016/07/06/4nvdMailing ListThird Party Advisory
www.securityfocus.com/bid/91678nvdThird Party AdvisoryVDB Entry
gitlab.labs.nic.cz/labs/knot/issues/464nvdVendor Advisory
gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adae82/NEWSnvdRelease NotesVDB Entry
lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.htmlnvdTechnical Description

News mentions

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