GLSA 200705-09: IPsec-Tools: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	IPsec-Tools: Denial of Service
Date:	05/08/2007
Bugs:	#173219
ID:	200705-09

Synopsis

IPsec-Tools contains a vulnerability that allows a remote attacker to crash the IPsec tunnel.

Background

IPsec-Tools is a port of KAME's implementation of the IPsec utilities. It contains a collection of network monitoring tools, including racoon, ping, and ping6.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-firewall/ipsec-tools	< 0.6.7	>= 0.6.7	All supported architectures

Description

The isakmp_info_recv() function in src/racoon/isakmp_inf.c does not always check that DELETE (ISAKMP_NPTYPE_D) and NOTIFY (ISAKMP_NPTYPE_N) packets are encrypted.

Impact

A remote attacker could send a specially crafted IPsec message to one of the two peers during the beginning of phase 1, resulting in the termination of the IPsec exchange.

Workaround

There is no known workaround at this time.

Resolution

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

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-firewall/ipsec-tools-0.6.7"

References

CVE-2007-1841

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200705-09.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.