CVE-2023-50269

Name	CVE-2023-50269
Description	Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3709-1, DSA-5637-1
Debian Bugs	1058721

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
squid (PTS)	buster	4.6-1+deb10u7	vulnerable
	buster (security)	4.6-1+deb10u10	fixed
	bullseye	4.13-10+deb11u2	vulnerable
	bullseye (security)	4.13-10+deb11u3	fixed
	bookworm	5.7-2	vulnerable
	bookworm (security)	5.7-2+deb12u1	fixed
	trixie	6.6-1	fixed
	sid	6.9-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
squid	source	buster	4.6-1+deb10u9	DLA-3709-1
squid	source	bullseye	4.13-10+deb11u3	DSA-5637-1
squid	source	bookworm	5.7-2+deb12u1	DSA-5637-1
squid	source	(unstable)	6.6-1		1058721
squid3	source	(unstable)	(unfixed)

Notes

https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3
http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch
http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch