CVE-2017-11104: Debian Linux

Medium severity, CVSS 5.9. EPSS: 2.7% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Knot-DNS Knot DNS: up to and including 2.4.4; version 2.5.0 only; version 2.5.1 only

Published 2017-07-08. Last modified 2026-06-17.