CVE-2022-2663
MEDIUMLinux Kernel - Firewall Bypass via IRC Connection Tracking Confusion
Title source: llmDescription
An issue was found in the Linux kernel in nf_conntrack_irc where the message handling can be confused and incorrectly matches the message. A firewall may be able to be bypassed when users are using unencrypted IRC with nf_conntrack_irc configured.
References (7)
Core 7
Core References
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
Third Party Advisory vendor-advisory
https://www.debian.org/security/2022/dsa-5257
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
Exploit, Third Party Advisory
https://dgl.cx/2022/08/nat-again-irc-cve-2022-2663
Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/08/30/1
Exploit, Third Party Advisory
https://www.youtube.com/watch?v=WIq-YgQuYCA
Scores
CVSS v3
5.3
EPSS
0.0020
EPSS Percentile
42.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Details
CWE
CWE-923
Status
published
Products (3)
debian/debian_linux
10.0
debian/debian_linux
11.0
linux/linux_kernel
Published
Sep 01, 2022
Tracked Since
Feb 18, 2026