[Full-disclosure] [ GLSA 200510-01 ] gtkdiskfree: Insecure temporary file creation

[Thierry Carrez]

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Gentoo Linux Security Advisory                           GLSA 200510-01
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: gtkdiskfree: Insecure temporary file creation
      Date: October 03, 2005
      Bugs: #104565
        ID: 200510-01

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Synopsis
========

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

Background
==========

gtkdiskfree is a GTK-based GUI to show free disk space.

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

    -------------------------------------------------------------------
     Package                /  Vulnerable  /                Unaffected
    -------------------------------------------------------------------
  1  app-admin/gtkdiskfree     < 1.9.3-r1                  >= 1.9.3-r1

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

Eric Romang discovered that gtkdiskfree insecurely creates a
predictable temporary file to handle command output.

Impact
======

A local attacker could create a symbolic link in the temporary files
directory, pointing to a valid file somewhere on the filesystem. When
gtkdiskfree is executed, this would result in the file being
overwritten with the rights of the user running the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All gtkdiskfree users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-admin/gtkdiskfree-1.9.3-r1"

References
==========

  [ 1 ] CAN-2005-2918
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2918
  [ 2 ] Original Advisory
        http://www.zataz.net/adviso/gtkdiskfree-09052005.txt

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

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

  http://security.gentoo.org/glsa/glsa-200510-01.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 at 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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