[ GLSA 200406-20 ] FreeS/WAN, Openswan, strongSwan: Vulns.

[pahud]

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Gentoo Linux Security Advisory GLSA 200406-20
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http://security.gentoo.org/
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Severity: Normal
Title: FreeS/WAN, Openswan, strongSwan: Vulnerabilities in
certificate handling
Date: June 25, 2004
ID: 200406-20

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Synopsis
========

FreeS/WAN, Openswan, strongSwan and Super-FreeS/WAN contain two bugs
when authenticating PKCS#7 certificates. This could allow an attacker
to authenticate with a fake certificate.

Background
==========

FreeS/WAN, Openswan, strongSwan and Super-FreeS/WAN are Open Source
implementations of IPsec for the Linux operating system. They are all
based on the discontinued FreeS/WAN project.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/freeswan < 2.04-r1 >= 2.04-r1
== 1.99-r1
2 net-misc/openswan < 2.1.4 >= 2.1.4
== 1.0.6_rc1
3 net-misc/strongswan < 2.1.3 >= 2.1.3
4 net-misc/super-freeswan <= 1.99.7.3 Vulnerable!

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

All these IPsec implementations have several bugs in the
verify_x509cert() function, which performs certificate validation, that
make them vulnerable to malicious PKCS#7 wrapped objects.

Impact
======

With a carefully crafted certificate payload an attacker can
successfully authenticate against FreeS/WAN, Openswan, strongSwan or
Super-FreeS/WAN, or make the daemon go into an endless loop.

Workaround
==========

There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version.

Resolution
==========

All FreeS/WAN 1.9x users should upgrade to the latest stable version:

# emerge sync

# emerge -pv "=net-misc/freeswan-1.99-r1"
# emerge "=net-misc/freeswan-1.99-r1"

All FreeS/WAN 2.x users should upgrade to the latest stable version:

# emerge sync

# emerge -pv ">=net-misc/freeswan-2.04-r1"
# emerge ">=net-misc/freeswan-2.04-r1"

All Openswan 1.x users should upgrade to the latest stable version:

# emerge sync

# emerge -pv "=net-misc/openswan-1.0.6_rc1"
# emerge "=net-misc/openswan-1.0.6_rc1"

All Openswan 2.x users should upgrade to the latest stable version:

# emerge sync

# emerge -pv ">=net-misc/openswan-2.1.4"
# emerge ">=net-misc/openswan-2.1.4"

All strongSwan users should upgrade to the latest stable version:

# emerge sync

# emerge -pv ">=net-misc/strongswan-2.1.3"
# emerge ">=net-misc/strongswan-2.1.3"

All Super-FreeS/WAN users should migrate to the latest stable version
of Openswan. Note that Portage will force a move for Super-FreeS/WAN
users to Openswan.

# emerge sync

# emerge -pv "=net-misc/openswan-1.0.6_rc1"
# emerge "=net-misc/openswan-1.0.6_rc1"

References
==========

[ 1 ] Openswan/strongSwan Authentication Bug
http://lists.openswan.org/pipermail/dev ... 00370.html

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

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

http://security.gentoo.org/glsa/glsa-200406-20.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 2004 Gentoo Technologies, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

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