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[gentoo-announce] [ GLSA 202507-04 ] strongSwan: Buffer Overflow

Posted on 09 July 2025
Gentoo-announce

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Gentoo Linux Security Advisory GLSA 202507-04
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https://security.gentoo.org/
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Severity: Normal
Title: strongSwan: Buffer Overflow
Date: July 08, 2025
Bugs: #920105
ID: 202507-04

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Synopsis
========
A buffer overflow has been discovered in strongSwan, which can lead to
remote code execution.

Background
==========
strongSwan is an IPSec implementation for Linux.

Affected packages
=================
Package Vulnerable Unaffected
------------------ ------------ ------------
net-vpn/strongswan < 5.9.13 >= 5.9.13

Description
===========
Multiple vulnerabilities have been discovered in strongSwan. Please
review the CVE identifiers referenced below for details.

Impact
======
A vulnerability in charon-tkm related to processing DH public values was
discovered in strongSwan that can result in a buffer overflow and
potentially remote code execution.

Workaround
==========
There is no known workaround at this time.

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

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-vpn/strongswan-5.9.13"

References
==========
[ 1 ] CVE-2023-41913
https://nvd.nist.gov/vuln/detail/CVE-2023-41913

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

https://security.gentoo.org/glsa/202507-04

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 2025 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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