CVE-2022-39957

Name	CVE-2022-39957
Description	The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass. A client can issue an HTTP Accept header field containing an optional "charset" parameter in order to receive the response in an encoded form. Depending on the "charset", this response can not be decoded by the web application firewall. A restricted resource, access to which would ordinarily be detected, may therefore bypass detection. The legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and 3.3.2. Integrators and users are advised to upgrade to 3.2.2 and 3.3.3 respectively.
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-3293-1, ELA-783-1
Debian Bugs	1021137

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
modsecurity-crs (PTS)	jessie	2.2.9-1+deb8u1	vulnerable
	stretch (lts), stretch	3.2.3-0+deb9u1	fixed
	buster (security), buster, buster (lts)	3.2.3-0+deb10u3	fixed
	bullseye	3.3.0-1+deb11u1	vulnerable
	bookworm	3.3.4-1	fixed
	sid, trixie	3.3.7-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
modsecurity-crs	source	jessie	(unfixed)	end-of-life
modsecurity-crs	source	stretch	3.2.3-0+deb9u1		ELA-783-1
modsecurity-crs	source	buster	3.2.3-0+deb10u3		DLA-3293-1
modsecurity-crs	source	(unstable)	3.3.4-1			1021137

Notes

[bullseye] - modsecurity-crs <no-dsa> (Minor issues; will be fixed in point release)
https://coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cves/