A new security update has been released for Gentoo Linux - IPsec-Tools: Denial of Service. Here the announcement:
Gentoo Linux Security Advisory GLSA 200705-09
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http://security.gentoo.org/
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Severity: Normal
Title: IPsec-Tools: Denial of Service
Date: May 08, 2007
Bugs: #173219
ID: 200705-09
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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
-------------------------------------------------------------------
1 net-firewall/ipsec-tools < 0.6.7 >= 0.6.7
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
==========
[ 1 ] CVE-2007-1841
http://cve.mitre.org/cgi-bin/cvename.cgi?name=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
http://bugs.gentoo.org.
License
=======
Copyright 2007 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
