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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade knot | Sep 22, 2017 | Jul 8, 2017 |
| Debian | — | Upgrade knot | Jul 15, 2017 | Jul 8, 2017 |
| Suse | — | Upgrade knot | May 24, 2018 | Jul 8, 2017 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Jul 8, 2017 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub