| Main Archive Page > Month Archives > bugtraq archives |
[ GLSA 200806-08 ] OpenSSL: Denial of Service
From: Robert Buchholz <rbu_at_nospam>Date: Mon Jun 23 2008 - 22:48:39 GMT
To: gentoo-announce@gentoo.org
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200806-08
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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