Home » 2009 » December » 3 » [ GLSA 200912-01 ] OpenSSL: Multiple vulnerabilities
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[ GLSA 200912-01 ] OpenSSL: Multiple vulnerabilities
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Gentoo Linux Security Advisory                           GLSA 200912-01
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                                           http://security.gentoo.org/
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 Severity: Normal
    Title: OpenSSL: Multiple vulnerabilities
     Date: December 01, 2009
     Bugs: #270305, #280591, #292022
       ID: 200912-01

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Synopsis
========

Multiple vulnerabilities in OpenSSL might allow remote attackers to
conduct multiple attacks, including the injection of arbitrary data
into encrypted byte streams.

Background
==========

OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer
(SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general
purpose cryptography library.

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

   -------------------------------------------------------------------
    Package           /   Vulnerable   /                   Unaffected
   -------------------------------------------------------------------
 1  dev-libs/openssl      < 0.9.8l-r2                    >= 0.9.8l-r2

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

Multiple vulnerabilities have been reported in OpenSSL:

* Marsh Ray of PhoneFactor and Martin Rex of SAP independently
 reported that the TLS protocol does not properly handle session
 renegotiation requests (CVE-2009-3555).

* The MD2 hash algorithm is no longer considered to be
 cryptographically strong, as demonstrated by Dan Kaminsky.
 Certificates using this algorithm are no longer accepted
 (CVE-2009-2409).

* Daniel Mentz and Robin Seggelmann reported the following
 vulnerabilities related to DTLS: A use-after-free flaw
 (CVE-2009-1379) and a NULL pointer dereference (CVE-2009-1387) in the
 dtls1_retrieve_buffered_fragment() function in src/d1_both.c,
 multiple memory leaks in the dtls1_process_out_of_seq_message()
 function in src/d1_both.c (CVE-2009-1378), and a processing error
 related to a large amount of DTLS records with a future epoch in the
 dtls1_buffer_record() function in ssl/d1_pkt.c (CVE-2009-1377).

Impact
======

A remote unauthenticated attacker, acting as a Man in the Middle, could
inject arbitrary plain text into a TLS session, possibly leading to the
ability to send requests as if authenticated as the victim. A remote
attacker could furthermore send specially crafted DTLS packages to a
service using OpenSSL for DTLS support, possibly resulting in a Denial
of Service. Also, a remote attacker might be able to create rouge
certificates, facilitated by a MD2 collision. NOTE: The amount of
computation needed for this attack is still very large.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenSSL users should upgrade to the latest version:

   # emerge --sync
   # emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8l-r2"

References
==========

 [ 1 ] CVE-2009-1377
       http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1377
 [ 2 ] CVE-2009-1378
       http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1378
 [ 3 ] CVE-2009-1379
       http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1379
 [ 4 ] CVE-2009-1387
       http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1387
 [ 5 ] CVE-2009-2409
       http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2409
 [ 6 ] CVE-2009-3555
       http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555

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

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

 http://security.gentoo.org/glsa/glsa-200912-01.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.

License
=======

Copyright 2009 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
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