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Sicherheit: Denial of Service in OpenSSL
Aktuelle Meldungen Distributionen
Name: Denial of Service in OpenSSL
ID: 200806-08
Distribution: Gentoo
Plattformen: Keine Angabe
Datum: Di, 24. Juni 2008, 00:54
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0891
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1672
Applikationen: OpenSSL

Originalnachricht

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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@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

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