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Gentoo Linux Security Advisory                           GLSA 200405-05
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                                            https://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:

     https://security.gentoo.org/glsa/200405-05

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 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.

https://creativecommons.org/licenses/by-sa/1.0/