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[gentoo-announce] [ GLSA 202409-23 ] ZNC: Remote Code Execution

Posted on 24 September 2024
Gentoo-announce

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Gentoo Linux Security Advisory GLSA 202409-23
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https://security.gentoo.org/
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Severity: Normal
Title: ZNC: Remote Code Execution
Date: September 24, 2024
Bugs: #935422
ID: 202409-23

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Synopsis
========
A vulnerability has been found in ZNC which could result in remote code
execution.

Background
==========
ZNC is an advanced IRC bouncer.

Affected packages
=================
Package Vulnerable Unaffected
----------- ------------ ------------
net-irc/znc < 1.9.1 >= 1.9.1

Description
===========
ZNC's modtcl could allow for remote code execution via a KICK.

Impact
======
A vulnerable ZNC with the modtcl module loaded could be exploited for
remote code execution.

Workaround
==========
Unload the mod_tcl module.

Resolution
==========
All ZNC users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-irc/znc-1.9.1"

References
==========
[ 1 ] CVE-2024-39844
https://nvd.nist.gov/vuln/detail/CVE-2024-39844

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

https://security.gentoo.org/glsa/202409-23

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
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======
Copyright 2024 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
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