CVE-2017-11104

Public Exploit

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.58% Top 20%
Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.debian.org/security/2017/dsa-3910 third party advisory vendor advisory
http://www.securityfocus.com/bid/99598 vdb entry broken link
https://bugs.debian.org/865678 issue tracking third party advisory
http://www.synacktiv.ninja/ressources/Knot_DNS_TSIG_Signature_Forgery.pdf patch mitigation exploit third party advisory
https://lists.nic.cz/pipermail/knot-dns-users/2017-June/001144.html mailing list patch third party advisory broken link
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00078.html vendor advisory broken link
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00076.html vendor advisory broken link
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00089.html vendor advisory broken link
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00049.html vendor advisory broken link

Frequently Asked Questions

What is the severity of CVE-2017-11104?
CVE-2017-11104 has been scored as a medium severity vulnerability.
How to fix CVE-2017-11104?
To fix CVE-2017-11104, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-11104 being actively exploited in the wild?
It is possible that CVE-2017-11104 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.