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bugtraq: [ GLSA 200806-08 ] OpenSSL: Denial of Service

[ 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
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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