CVE-2022-44572

Name	CVE-2022-44572
Description	A denial of service vulnerability in the multipart parsing component of Rack fixed in 2.0.9.2, 2.1.4.2, 2.2.4.1 and 3.0.0.1 could allow an attacker tocraft input that can cause RFC2183 multipart boundary parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. Any applications that parse multipart posts using Rack (virtually all Rails applications) are impacted.
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-3298-1, DSA-5530-1
Debian Bugs	1029832

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ruby-rack (PTS)	bullseye (security), bullseye	2.1.4-3+deb11u2	fixed
	bookworm, bookworm (security)	2.2.6.4-1+deb12u1	fixed
	sid, trixie	2.2.7-1.1	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
ruby-rack	source	buster	2.0.6-3+deb10u2	DLA-3298-1
ruby-rack	source	bullseye	2.1.4-3+deb11u1	DSA-5530-1
ruby-rack	source	(unstable)	2.2.4-3		1029832

Notes

https://github.com/rack/rack/commit/dc50f8e495f67eb933b1fc33ebee550908d945e6 (v2.0.9.2)
https://github.com/rack/rack/commit/8291f502b0e1dcf514cc25c34e4bf0beec7a92ae (v2.1.4.2)
https://github.com/rack/rack/commit/19e49f0f185d7e42ed5b402baec6c897a8c48029 (v2.2.6.1)