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[gentoo-announce] [ GLSA 200912-01 ] OpenSSL: Multiple vulnerabilities

Posted on 01 December 2009
Gentoo-announce

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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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