Knot DNS before 2.4.5 and 2.5.x before 2.5.2 contains a flaw within the TSIG protocol…
Priority LOW 31CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.02681 85th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:knot-dns:knot_dns:*:*:*:*:*:*:*:* | up to 2.4.4 | Vulnerable | Knot-dns |
| cpe:2.3:a:knot-dns:knot_dns:2.5.0:*:*:*:*:*:*:* | 2.5.0 | Vulnerable | Knot-dns |
| cpe:2.3:a:knot-dns:knot_dns:2.5.1:*:*:*:*:*:*:* | 2.5.1 | Vulnerable | Knot-dns |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
- cpe:2.3:a:knot-dns:knot_dns:*:*:*:*:*:*:*:* Versions up to 2.4.4 Vulnerable ·Knot-dns
- cpe:2.3:a:knot-dns:knot_dns:2.5.0:*:*:*:*:*:*:* Versions 2.5.0 Vulnerable ·Knot-dns
- cpe:2.3:a:knot-dns:knot_dns:2.5.1:*:*:*:*:*:*:* Versions 2.5.1 Vulnerable ·Knot-dns
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2017-11104
- 2026-10-03 Alias added: GHSA-xhxv-xr8w-7xpm
References
Sources
- CVE-2017-11104 · CVE Program
- CVE-2017-11104 · NVD
- FIRST EPSS
- GHSA-xhxv-xr8w-7xpm · GitHub Advisory Database · CC BY 4.0
- CVE-2017-11104 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences