CVE-2024-31082

Name	CVE-2024-31082
Description	A heap-based buffer over-read vulnerability was found in the X.org server's ProcAppleDRICreatePixmap() function. This issue occurs when byte-swapped length values are used in replies, potentially leading to memory leakage and segmentation faults, particularly when triggered by a client with a different endianness. This vulnerability could be exploited by an attacker to cause the X server to read heap memory values and then transmit them back to the client until encountering an unmapped page, resulting in a crash. Despite the attacker's inability to control the specific memory copied into the replies, the small length values typically stored in a 32-bit integer can result in significant attempted out-of-bounds reads.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

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	vulnerable
	stretch (security)	2:1.19.2-1+deb9u9	vulnerable
	stretch (lts), stretch	2:1.19.2-1+deb9u20	vulnerable
	buster, buster (lts)	2:1.20.4-1+deb10u15	vulnerable
	buster (security)	2:1.20.4-1+deb10u14	vulnerable
	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
	sid, trixie	2:21.1.14-2	fixed

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

Package	Type	Release	Fixed Version	Urgency
xorg-server	source	bullseye	2:1.20.11-1+deb11u13
xorg-server	source	bookworm	2:21.1.7-3+deb12u7
xorg-server	source	(unstable)	2:21.1.11-3	unimportant

Notes

Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/6c684d035c06fd41c727f0ef0744517580864cef
https://lists.x.org/archives/xorg-announce/2024-April/003497.html
Affects the XQuartz (X11 server and client libraries for macOS) component