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             AUSCERT External Security Bulletin Redistribution

                               ESB-2012.0074
            OpenSSL Denial of service - Remote/unauthenticated
                              20 January 2012

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

Product:           OpenSSL 1.0.0f and 0.9.8s
Publisher:         OpenSSL
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2011-4108  

Reference:         ESB-2012.0062

Original Bulletin: 
   http://www.openssl.org/news/secadv_20120118.txt

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than OpenSSL. It is recommended that administrators
         running OpenSSL 1.0.0f check for an updated version of the software
         for their operating system.

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OpenSSL Security Advisory [18 Jan 2011]
=======================================

DTLS DoS attack (CVE-2012-0050)
================================

A flaw in the fix to CVE-2011-4108 can be exploited in a denial of
service attack. Only DTLS applications using OpenSSL 1.0.0f and
0.9.8s are affected.


Thanks to Antonio Martin, Enterprise Secure Access Research and
Development, Cisco Systems, Inc. for discovering this bug and
preparing a fix.

Affected users should upgrade to OpenSSL 1.0.0g or 0.9.8t.

References
==========

URL for this Security Advisory:
http://www.openssl.org/news/secadv_20120118.txt

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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