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Gentoo Linux Security Advisory GLSA 201603-13
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https://security.gentoo.org/
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Severity: Normal
Title: Libreswan: Multiple Vulnerabilities
Date: March 12, 2016
Bugs: #550974, #558692
ID: 201603-13

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Synopsis
========

Multiple vulnerabilities have been found in libreSwan possibly
resulting in Denial of Service.

Background
==========

Libreswan is a free software implementation of the most widely
supported and standarized VPN protocol based on (“IPsec”) and the
Internet Key Exchange (“IKE”).

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

——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 net-misc/libreswan < 3.15 >= 3.15

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

The pluto IKE daemon in Libreswan, when built with NSS, allows remote
attackers to cause a Denial of Service (assertion failure and daemon
restart) via a zero DH g^x value in a KE payload in a IKE packet.
Additionally, remote attackers could cause a Denial of Service (daemon
restart) via an IKEv1 packet with (1) unassigned bits set in the IPSEC
DOI value or (2) the next payload value set to ISAKMP_NEXT_SAK.

Impact
======

Remote attackers could possibly cause Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Libreswan users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=net-misc/libreswan-3.15”

References
==========

[ 1 ] CVE-2015-3204
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-3204
[ 2 ] CVE-2015-3240
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-3240

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

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

https://security.gentoo.org/glsa/201603-13

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 2016 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.

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

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