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TUCoPS :: Linux :: Gentoo :: bt-22070.htm

OpenSSL: Multiple vulnerabilities



OpenSSL: Multiple vulnerabilities
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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