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Gentoo Linux Security Advisory                           GLSA 200508-05
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                                            https://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:

  https://security.gentoo.org/glsa/200508-05

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
https://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.

https://creativecommons.org/licenses/by-sa/2.0/