[gentoo-announce] [ GLSA 200806-08 ] OpenSSL: Denial of Service

[news 28]

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Gentoo Linux Security Advisory GLSA 200806-08

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http://security.gentoo.org/

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Severity: Normal

Title: OpenSSL: Denial of Service

Date: June 23, 2008

Bugs: #223429

ID: 200806-08

 

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Synopsis

========

 

Two vulnerabilities might allow for a Denial of Service of daemons

using OpenSSL.

 

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 < 0.9.8g-r2 >= 0.9.8g-r2

< 0.9.8f

 

Description

===========

 

Ossi Herrala and Jukka Taimisto of Codenomicon discovered two

vulnerabilities:

 

* A double free() call in the TLS server name extension

(CVE-2008-0891).

 

* The OpenSSL client code does not properly handle servers that omit

the Server Key Exchange message in the TLS handshake (CVE-2008-1672).

 

Impact

======

 

A remote attacker could connect to a vulnerable server, or entice a

daemon to connect to a malicious server, causing a Denial of Service of

the daemon in both cases.

 

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-0.9.8g-r2"

 

References

==========

 

[ 1 ] CVE-2008-0891

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0891

[ 2 ] CVE-2008-1672

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1672

 

Availability

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

 

This GLSA and any updates to it are available for viewing at

the Gentoo Security Website:

 

http://security.gentoo.org/glsa/glsa-200806-08.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 ( -at -) gentoo.org or alternatively, you may file a bug at

http://bugs.gentoo.org.

 

License

=======

 

Copyright 2008 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