CVE-2024-25617

Name	CVE-2024-25617
Description	Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Collapse of Data into Unsafe Value bug ,Squid may be vulnerable to a Denial of Service attack against HTTP header parsing. This problem allows a remote client or a remote server to perform Denial of Service when sending oversized headers in HTTP messages. In versions of Squid prior to 6.5 this can be achieved if the request_header_max_size or reply_header_max_size settings are unchanged from the default. In Squid version 6.5 and later, the default setting of these parameters is safe. Squid will emit a critical warning in cache.log if the administrator is setting these parameters to unsafe values. Squid will not at this time prevent these settings from being changed to unsafe values. Users are advised to upgrade to version 6.5. There are no known workarounds for this vulnerability. This issue is also tracked as SQUID-2024:2
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-5637-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
squid (PTS)	buster (security), buster, buster (lts)	4.6-1+deb10u10	vulnerable
	bullseye (security), bullseye	4.13-10+deb11u3	fixed
	bookworm (security), bookworm	5.7-2+deb12u2	fixed
	sid, trixie	6.12-1	fixed
squid3 (PTS)	jessie, jessie (lts)	3.5.23-5+deb8u7	vulnerable
	stretch (security)	3.5.23-5+deb9u7	vulnerable
	stretch (lts), stretch	3.5.23-5+deb9u10	vulnerable

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

Package	Type	Release	Fixed Version	Origin
squid	source	bullseye	4.13-10+deb11u3	DSA-5637-1
squid	source	bookworm	5.7-2+deb12u1	DSA-5637-1
squid	source	(unstable)	6.5-1
squid3	source	(unstable)	(unfixed)

Notes

https://github.com/squid-cache/squid/security/advisories/GHSA-h5x6-w8mv-xfpr
https://github.com/squid-cache/squid/commit/72a3bbd5e431597c3fdb56d752bc56b010ba3817 (SQUID_6_5)
https://github.com/squid-cache/squid/pull/1536
https://megamansec.github.io/Squid-Security-Audit/response-memleaks.html