AusCERT - ESB-2013.0609 - [Linux][Debian] strongswan: Unauthorised access

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ESB-2013.0609 - [Linux][Debian] strongswan: Unauthorised access - Remote/unauthenticated
Date: 01 May 2013
References: ESB-2012.0510

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2013.0609
                        strongswan security update
                                1 May 2013

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           strongswan
Publisher:         Debian
Operating System:  Debian GNU/Linux 6
                   Linux variants
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2013-2944 CVE-2012-2388 

Reference:         ESB-2012.0510

Original Bulletin: 
   http://www.debian.org/security/2013/dsa-2665

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running strongswan check for an updated version of the software for
         their operating system.

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- - -------------------------------------------------------------------------
Debian Security Advisory DSA-2665-1                   security@debian.org
http://www.debian.org/security/                         Yves-Alexis Perez
April 30, 2013                         http://www.debian.org/security/faq
- - -------------------------------------------------------------------------

Package        : strongswan
Vulnerability  : authentication bypass
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2013-2944

Kevin Wojtysiak discovered a vulnerability in strongSwan, an IPsec based VPN
solution.

When using the openssl plugin for ECDSA based authentication, an empty, zeroed
or otherwise invalid signature is handled as a legitimate one. An attacker
could use a forged signature to authenticate like a legitimate user and gain
access to the VPN (and everything protected by this).

While the issue looks like CVE-2012-2388 (RSA signature based authentication
bypass), it is unrelated.

For the stable distribution (squeeze), this problem has been fixed in
version 4.4.1-5.3.

For the testing distribution (wheezy), this problem has been fixed in
version 4.5.2-1.5+deb7u1.

For the unstable distribution (sid), this problem has been fixed in
version 4.6.4-7.

We recommend that you upgrade your strongswan packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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===========================================================================
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