GLSA 201603-13: Libreswan: Multiple Vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Libreswan: Multiple Vulnerabilities
Date:	03/12/2016
Bugs:	#550974, #558692
ID:	201603-13

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	Architecture(s)
net-misc/libreswan	< 3.15	>= 3.15	All supported architectures

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

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201603-13.xml

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.