CVE-2022-2320

Name	CVE-2022-2320
Description	A flaw was found in the Xorg-x11-server. The specific flaw exists within the handling of ProcXkbSetDeviceInfo requests. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated buffer. This flaw allows an attacker to escalate privileges and execute arbitrary code in the context of root.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3068-1, DSA-5199-1
Debian Bugs	1014903

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xorg-server (PTS)	bullseye	2:1.20.11-1+deb11u13	fixed
	bullseye (security)	2:1.20.11-1+deb11u17	fixed
	bookworm	2:21.1.7-3+deb12u10	fixed
	bookworm (security)	2:21.1.7-3+deb12u11	fixed
	trixie	2:21.1.16-1.3	fixed
	trixie (security)	2:21.1.16-1.3+deb13u1	fixed
	forky, sid	2:21.1.18-2	fixed
xwayland (PTS)	bookworm	2:22.1.9-1	fixed
	trixie	2:24.1.6-1	fixed
	forky, sid	2:24.1.8-1	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
xorg-server	source	buster	2:1.20.4-1+deb10u5	DLA-3068-1
xorg-server	source	bullseye	2:1.20.11-1+deb11u2	DSA-5199-1
xorg-server	source	(unstable)	2:21.1.4-1		1014903
xwayland	source	(unstable)	2:22.1.3-1

Notes

Introduced by: https://github.com/freedesktop/xorg-xserver/commit/c06e27b2f6fd9f7b9f827623a48876a225264132 (xorg-server-1.5.99.1)
Fixed by: https://github.com/freedesktop/xorg-xserver/commit/dd8caf39e9e15d8f302e54045dd08d8ebf1025dc
Required for fixes: https://github.com/freedesktop/xorg-xserver/commit/f1070c01d616c5f21f939d5ebc533738779451ac
https://www.openwall.com/lists/oss-security/2022/07/12/1