CVE-2022-46340

NameCVE-2022-46340
DescriptionA vulnerability was found in X.Org. This security flaw occurs becuase the swap handler for the XTestFakeInput request of the XTest extension may corrupt the stack if GenericEvents with lengths larger than 32 bytes are sent through a the XTestFakeInput request. 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. This issue does not affect systems where client and server use the same byte order.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3256-1, DSA-5304-1
Debian Bugs1026071

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xorg-server (PTS)buster2:1.20.4-1+deb10u4vulnerable
buster (security)2:1.20.4-1+deb10u14fixed
bullseye2:1.20.11-1+deb11u11fixed
bullseye (security)2:1.20.11-1+deb11u13fixed
bookworm2:21.1.7-3+deb12u5fixed
bookworm (security)2:21.1.7-3+deb12u7fixed
sid, trixie2:21.1.12-1fixed
xwayland (PTS)bookworm2:22.1.9-1fixed
trixie2:23.2.4-1fixed
sid2:23.2.6-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xorg-serversourcebuster2:1.20.4-1+deb10u7DLA-3256-1
xorg-serversourcebullseye2:1.20.11-1+deb11u4DSA-5304-1
xorg-serversource(unstable)2:21.1.5-11026071
xwaylandsource(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/b320ca0ffe4c0c872eeb3a93d9bde21f765c7c63

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