CVE-2023-42822

Name	CVE-2023-42822
Description	xrdp is an open source remote desktop protocol server. Access to the font glyphs in xrdp_painter.c is not bounds-checked . Since some of this data is controllable by the user, this can result in an out-of-bounds read within the xrdp executable. The vulnerability allows an out-of-bounds read within a potentially privileged process. On non-Debian platforms, xrdp tends to run as root. Potentially an out-of-bounds write can follow the out-of-bounds read. There is no denial-of-service impact, providing xrdp is running in forking mode. This issue has been addressed in release 0.9.23.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1053284

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xrdp (PTS)	buster	0.9.9-1+deb10u1	vulnerable
	buster (security)	0.9.9-1+deb10u3	vulnerable
	bullseye (security), bullseye	0.9.21.1-1~deb11u1	vulnerable
	bookworm	0.9.21.1-1	vulnerable
	sid, trixie	0.9.24-4	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
xrdp	source	experimental	0.9.24-1
xrdp	source	(unstable)	0.9.24-2			1053284

Notes

[bookworm] - xrdp <no-dsa> (Minor issue)
[bullseye] - xrdp <no-dsa> (Minor issue)
[buster] - xrdp <no-dsa> (Minor issue)
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-2hjx-rm4f-r9hw
https://github.com/neutrinolabs/xrdp/commit/73acbe1f7957c65122b00de4d6f57a8d0d257c40