CVE-2020-24606

Name	CVE-2020-24606
Description	Squid before 4.13 and 5.x before 5.0.4 allows a trusted peer to perform Denial of Service by consuming all available CPU cycles during handling of a crafted Cache Digest response message. This only occurs when cache_peer is used with the cache digests feature. The problem exists because peerDigestHandleReply() livelocking in peer_digest.cc mishandles EOF.
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-2394-1, DSA-4751-1
Debian Bugs	968933

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
squid (PTS)	bullseye (security), bullseye	4.13-10+deb11u3	fixed
	bookworm, bookworm (security)	5.7-2+deb12u2	fixed
	sid, trixie	6.12-1	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+deb10u4	DSA-4751-1
squid	source	(unstable)	4.13-1		968933
squid3	source	stretch	3.5.23-5+deb9u5	DLA-2394-1
squid3	source	(unstable)	(unfixed)

Notes

https://github.com/squid-cache/squid/security/advisories/GHSA-vvj7-xjgq-g2jg
Squid 4: http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_9.patch