Severity: High
Title: rxvt-unicode: Arbitrary Code Execution
Date: October 30, 2023
Bugs: #884787
ID: 202310-20

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Synopsis
========

A vulnerability has been discovered in rxvt-unicode where data written
to the terminal can lead to code execution.

Background
==========

rxvt-unicode is a clone of the well known terminal emulator rxvt.

Affected packages
=================

Package Vulnerable Unaffected
---------------------- ------------ ------------
x11-terms/rxvt-unicode < 9.30 >= 9.30

Description
===========

A vulnerability has been discovered in rxvt-unicode. Please review the
CVE identifiers referenced below for details.

Impact
======

in the Perl background extension, when an attacker can
control the data written to the user's terminal and certain options are
set.

The "background" extension is automatically loaded if certain X
resources are set such as 'transparent' (see the full list at the top of
src/perl/background[1]). So it is possible to be using this extension
without realising it.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All rxvt-unicode users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-terms/rxvt-unicode-9.30"

References
==========

[ 1 ] CVE-2022-4170
https://nvd.nist.gov/vuln/detail/CVE-2022-4170

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/202310-20

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2023 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5