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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