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Gentoo Linux Security Advisory                           GLSA 200608-23
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http://security.gentoo.org/ 
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  Severity: Normal
     Title: Heartbeat: Denial of Service
      Date: August 24, 2006
      Bugs: #141894
        ID: 200608-23

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Synopsis
=======
Heartbeat is vulnerable to a Denial of Service which can be triggered
by a remote attacker without authentication.

Background
=========
Heartbeat is a component of the High-Availability Linux project. It is
used to perform death-of-node detection, communications and cluster
management.

Affected packages
================
    -------------------------------------------------------------------
     Package                /  Vulnerable  /                Unaffected
    -------------------------------------------------------------------
  1  sys-cluster/heartbeat       < 2.0.7                      >= 2.0.7

Description
==========
Yan Rong Ge discovered that the peel_netstring() function in
cl_netstring.c does not validate the "length" parameter of user input,
which can lead to an out-of-bounds memory access when processing
certain Heartbeat messages (CVE-2006-3121). Furthermore an unspecified
local DoS issue was fixed (CVE-2006-3815).

Impact
=====
By sending a malicious UDP Heartbeat message, even before
authentication, a remote attacker can crash the master control process
of the cluster.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All Heartbeat users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-cluster/heartbeat-2.0.7"

References
=========
  [ 1 ] CVE-2006-3121
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3121 
  [ 2 ] CVE-2006-3815
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3815 

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200608-23.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 2006 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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