[ GLSA 200405-05 ] Utempter symlink vulnerability

[Kurt Lieber <klieber () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200405-05
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Utempter symlink vulnerability
      Date: May 13, 2004
      Bugs: #49536
        ID: 200405-05

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Synopsis
========

Utempter contains a vulnerability that may allow local users to
overwrite arbitrary files via a symlink attack.

Background
==========

Utempter is an application that allows non-privileged apps to write
utmp (login) info, which otherwise needs root access.

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

    -------------------------------------------------------------------
     Package            /   Vulnerable   /                  Unaffected
    -------------------------------------------------------------------
  1  sys-apps/utempter       < 0.5.5.4                      >= 0.5.5.4

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

Utempter contains a vulnerability that may allow local users to
overwrite arbitrary files via a symlink attack.

Impact
======

This vulnerability may allow arbitrary files to be overwritten with
root privileges.

Workaround
==========

There is no known workaround at this time. All users are advised to
upgrade to the latest available version of utempter.

Resolution
==========

All users of utempter should upgrade to the latest stable version:

    # emerge sync

    # emerge -pv ">=sys-apps/utempter-0.5.5.4"
    # emerge ">=sys-apps/utempter-0.5.5.4"

References
==========

  [ 1 ] CAN-2004-0233
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0233

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

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

     http://security.gentoo.org/glsa/glsa-200405-05.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 2004 Gentoo Technologies, 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/1.0

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