CVE-2022-46343

Name	CVE-2022-46343
Description	A vulnerability was found in X.Org. This security flaw occurs because the handler for the ScreenSaverSetAttributes request may write to memory after it has been freed. This issue can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for ssh X forwarding sessions.
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-3256-1, DSA-5304-1, ELA-782-1
Debian Bugs	1026071

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xorg-server (PTS)	jessie, jessie (lts)	2:1.16.4-1+deb8u17	fixed
	stretch (security)	2:1.19.2-1+deb9u9	vulnerable
	stretch (lts), stretch	2:1.19.2-1+deb9u20	fixed
	buster, buster (lts)	2:1.20.4-1+deb10u15	fixed
	buster (security)	2:1.20.4-1+deb10u14	fixed
	bullseye	2:1.20.11-1+deb11u13	fixed
	bullseye (security)	2:1.20.11-1+deb11u14	fixed
	bookworm (security), bookworm	2:21.1.7-3+deb12u8	fixed
	trixie	2:21.1.14-2	fixed
	sid	2:21.1.15-2	fixed
xwayland (PTS)	bookworm	2:22.1.9-1	fixed
	sid, trixie	2:24.1.4-2	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
xorg-server	source	jessie	2:1.16.4-1+deb8u9	ELA-782-1
xorg-server	source	stretch	2:1.19.2-1+deb9u12	ELA-782-1
xorg-server	source	buster	2:1.20.4-1+deb10u7	DLA-3256-1
xorg-server	source	bullseye	2:1.20.11-1+deb11u4	DSA-5304-1
xorg-server	source	(unstable)	2:21.1.5-1		1026071
xwayland	source	(unstable)	2:22.1.6-1

Notes

https://lists.x.org/archives/xorg-announce/2022-December/003302.html
https://gitlab.freedesktop.org/xorg/xserver/commit/842ca3ccef100ce010d1d8f5f6d6cc1915055900