CVE-2022-2663

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.

Weakness

The product establishes a communication channel to (or from) an endpoint for privileged or protected operations, but it does not properly ensure that it is communicating with the correct endpoint.

Affected Software

Extended Description

Attackers might be able to spoof the intended endpoint from a different system or process, thus gaining the same level of access as the intended endpoint. While this issue frequently involves authentication between network-based clients and servers, other types of communication channels and endpoints can have this weakness.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/161.html
• https://cwe.mitre.org/data/definitions/481.html
• https://cwe.mitre.org/data/definitions/501.html
• https://cwe.mitre.org/data/definitions/697.html

References

• https://dgl.cx/2022/08/nat-again-irc-cve-2022-2663
• https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
• https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
• https://lore.kernel.org/netfilter-devel/20220826045658.100360-1-dgl%40dgl.cx/T/
• https://www.debian.org/security/2022/dsa-5257
• https://www.openwall.com/lists/oss-security/2022/08/30/1
• https://www.youtube.com/watch?v=WIq-YgQuYCA