Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Knot-Dns | Knot Dns | <= 2.4.4 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00076.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00078.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00089.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00049.htmlBroken Link
- http://www.debian.org/security/2017/dsa-3910Third Party Advisory
- http://www.securityfocus.com/bid/99598Broken Link
- http://www.synacktiv.ninja/ressources/Knot_DNS_TSIG_Signature_Forgery.pdfExploitMitigationPatch
- https://bugs.debian.org/865678Issue TrackingThird Party Advisory
- https://lists.nic.cz/pipermail/knot-dns-users/2017-June/001144.htmlBroken LinkMailing ListPatch
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00076.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00078.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00089.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00049.htmlBroken Link
- http://www.debian.org/security/2017/dsa-3910Third Party Advisory
- http://www.securityfocus.com/bid/99598Broken Link
FAQ
What is CVE-2017-11104?
CVE-2017-11104 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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 n...
How severe is CVE-2017-11104?
CVE-2017-11104 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-11104?
Check the references section above for vendor advisories and patch information. Affected products include: Knot-Dns Knot Dns, Debian Debian Linux.