xrdp: CVE-2023-42822: Unchecked access to font glyph info

Debian Bug report logs - #1053284
xrdp: CVE-2023-42822: Unchecked access to font glyph info

Reply or subscribe to this bug.

Toggle useless messages

Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: xrdp: CVE-2023-42822: Unchecked access to font glyph info

Date: Sat, 30 Sep 2023 20:57:22 +0200

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

Send a report that this bug log contains spam.