[ GLSA 200508-05 ] Heartbeat: Insecure temporary file creation

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200508-05
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Heartbeat: Insecure temporary file creation
      Date: August 07, 2005
      Bugs: #97175
        ID: 200508-05

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Synopsis
========

Heartbeat is vulnerable to symlink attacks, potentially allowing a
local user to overwrite arbitrary files.

Background
==========

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

Affected packages
=================

    -------------------------------------------------------------------
     Package                /  Vulnerable  /                Unaffected
    -------------------------------------------------------------------
  1  sys-cluster/heartbeat     < 1.2.3-r1                  >= 1.2.3-r1

Description
===========

Eric Romang has discovered that Heartbeat insecurely creates temporary
files with predictable filenames.

Impact
======

A local attacker could create symbolic links in the temporary file
directory, pointing to a valid file somewhere on the filesystem. When a
vulnerable script is executed, this could lead to the file being
overwritten with the rights of the user running the affected
application.

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-1.2.3-r1"

References
==========

  [ 1 ] CAN-2005-2231
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2231

Availability
============

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

  http://security.gentoo.org/glsa/glsa-200508-05.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 2005 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/2.0

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