CVE-2017-11104

MEDIUM 5.9CVE-2017-11104 · Published 08/07/2017 · updated 17/06/2026

In short

CVE-2017-11104 is a MEDIUM (CVSS 5.9) vulnerability affecting knot dns (knot-dns).
Chance of exploitation in the next 30 days (EPSS): 2.7%, higher than 85.9% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
knot dns knot-dns	`= 2.5.0= 2.5.1≤ 2.4.4`	No fix yet

Description

Knot DNS before 2.4.5 and 2.5.x before 2.5.2 contains a flaw within the TSIG protocol implementation that would allow an attacker with a valid key name and algorithm to bypass TSIG authentication if no additional ACL restrictions are set, because of an improper TSIG validity period check.

References

lists.opensuse.org/opensuse-security-announce/2020-07/msg00076.html · Broken Link
lists.opensuse.org/opensuse-security-announce/2020-07/msg00078.html · Broken Link
lists.opensuse.org/opensuse-security-announce/2020-07/msg00089.html · Broken Link
lists.opensuse.org/opensuse-security-announce/2020-09/msg00049.html · Broken Link
debian.org/security/2017/dsa-3910 · Third Party Advisory
securityfocus.com/bid/99598 · Broken Link
synacktiv.ninja/ressources/Knot_DNS_TSIG_Signature_Forgery.pdf · Exploit
bugs.debian.org/865678 · Issue Tracking
lists.nic.cz/pipermail/knot-dns-users/2017-June/001144.html · Broken Link

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