CVE-2017-11104 Information

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 Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00076.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00078.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00089.html http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00049.html http://www.debian.org/security/2017/dsa-3910 http://www.securityfocus.com/bid/99598 http://www.synacktiv.ninja/ressources/Knot_DNS_TSIG_Signature_Forgery.pdf https://bugs.debian.org/865678 https://lists.nic.cz/pipermail/knot-dns-users/2017-June/001144.html

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

5.9