Bug#1053284: xrdp: CVE-2023-42822: Unchecked access to font glyph info
Source: xrdp
Version: 0.9.21.1-1
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>
Hi,
The following vulnerability was published for xrdp.
CVE-2023-42822[0]:
| 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.
If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.
For further information see:
[0] https://security-tracker.debian.org/tracker/CVE-2023-42822
https://www.cve.org/CVERecord?id=CVE-2023-42822
[1] https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-2hjx-rm4f-r9hw
[2] https://github.com/neutrinolabs/xrdp/commit/73acbe1f7957c65122b00de4d6f57a8d0d257c40
Please adjust the affected versions in the BTS as needed.
Regards,
Salvatore
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