CVE-2024-31081

NameCVE-2024-31081
DescriptionA heap-based buffer over-read vulnerability was found in the X.org server's ProcXIPassiveGrabDevice() 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3787-1, DSA-5657-1, ELA-1072-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xorg-server (PTS)jessie, jessie (lts)2:1.16.4-1+deb8u17fixed
stretch (security)2:1.19.2-1+deb9u9vulnerable
stretch (lts), stretch2:1.19.2-1+deb9u20fixed
buster, buster (lts)2:1.20.4-1+deb10u15fixed
buster (security)2:1.20.4-1+deb10u14fixed
bullseye2:1.20.11-1+deb11u13fixed
bullseye (security)2:1.20.11-1+deb11u14fixed
bookworm (security), bookworm2:21.1.7-3+deb12u8fixed
trixie2:21.1.14-2fixed
sid2:21.1.15-2fixed
xwayland (PTS)bookworm2:22.1.9-1vulnerable
sid, trixie2:24.1.4-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xorg-serversourcejessie2:1.16.4-1+deb8u16ELA-1072-1
xorg-serversourcestretch2:1.19.2-1+deb9u19ELA-1072-1
xorg-serversourcebuster2:1.20.4-1+deb10u14DLA-3787-1
xorg-serversourcebullseye2:1.20.11-1+deb11u13DSA-5657-1
xorg-serversourcebookworm2:21.1.7-3+deb12u7DSA-5657-1
xorg-serversource(unstable)2:21.1.11-3
xwaylandsource(unstable)2:23.2.6-1

Notes

[bookworm] - xwayland <ignored> (Minor issue; Xwayland shouldn't be running as root)
Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/3e77295f888c67fc7645db5d0c00926a29ffecee
https://lists.x.org/archives/xorg-announce/2024-April/003497.html

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