Vulnerability Details : 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.

Published 2022-09-01 21:15:10

Updated 2023-02-12 22:15:28

Source Red Hat, Inc.

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2022-2663

Probability of exploitation activity in the next 30 days: 0.13%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 47 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2022-2663

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
5.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	3.9	1.4	nvd@nist.gov
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: Low Availability: None

CWE ids for CVE-2022-2663

CWE-923 Improper Restriction of Communication Channel to Intended Endpoints

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.

Assigned by: secalert@redhat.com (Primary)

References for CVE-2022-2663

https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html

[SECURITY] [DLA 3131-1] linux security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://lore.kernel.org/netfilter-devel/20220826045658.100360-1-dgl%40dgl.cx/T/

[PATCH 1/2] netfilter: nf_conntrack_irc: Tighten matching on DCC message
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html

[SECURITY] [DLA 3173-1] linux-5.10 security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://www.youtube.com/watch?v=WIq-YgQuYCA

NAT-Again IRC demo with Irssi - YouTube
Exploit;Third Party Advisory
https://www.debian.org/security/2022/dsa-5257

Debian -- Security Information -- DSA-5257-1 linux
Third Party Advisory

CVEs referencing this url
https://dgl.cx/2022/08/nat-again-irc-cve-2022-2663

NAT-Again: IRC NAT helper flaws
Exploit;Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/08/30/1

oss-security - CVE-2022-2663: Linux netfilter: nf_conntrack_irc message handling
Mailing List;Third Party Advisory

Products affected by CVE-2022-2663

Debian » Debian Linux » Version: 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 11.0
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
Matching versions
Linux » Linux Kernel » Version: N/A
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Matching versions