GLSA 200512-04: Openswan, IPsec-Tools: Vulnerabilities in ISAKMP Protocol implementation

http://security.gentoo.org/

Severity:	low
Title:	Openswan, IPsec-Tools: Vulnerabilities in ISAKMP Protocol implementation
Date:	12/12/2005
Bugs:	#112568, #113201
ID:	200512-04

Synopsis

Openswan and IPsec-Tools suffer from an implementation flaw which may allow a Denial of Service attack.

Background

Openswan is an implementation of IPsec for Linux. IPsec-Tools is a port of KAME's implementation of the IPsec utilities, including racoon, an Internet Key Exchange daemon. Internet Key Exchange version 1 (IKEv1), a derivate of ISAKMP, is an important part of IPsec. IPsec is widely used to secure exchange of packets at the IP layer and mostly used to implement Virtual Private Networks (VPNs).

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/openswan	< 2.4.4	>= 2.4.4	All supported architectures
net-firewall/ipsec-tools	< 0.6.3	>= 0.6.3	All supported architectures

Description

The Oulu University Secure Programming Group (OUSPG) discovered that various ISAKMP implementations, including Openswan and racoon (included in the IPsec-Tools package), behave in an anomalous way when they receive and handle ISAKMP Phase 1 packets with invalid or abnormal contents.

Impact

A remote attacker could craft specific packets that would result in a Denial of Service attack, if Openswan and racoon are used in specific, weak configurations.

Workaround

There is no known workaround at this time.

Resolution

All Openswan users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/openswan-2.4.4"

All IPsec-Tools users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose net-firewall/ipsec-tools

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200512-04.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.