full-disclosure - [ GLSA 200604-13 ] fbida: Insecure temporary file creation

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Date: Sun Apr 23 20:50:49 2006
From: jaervosz at gentoo.org (Sune Kloppenborg Jeppesen)
Subject: [ GLSA 200604-13 ] fbida: Insecure temporary file
	creation

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Gentoo Linux Security Advisory                           GLSA 200604-13
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: fbida: Insecure temporary file creation
      Date: April 23, 2006
      Bugs: #129470
        ID: 200604-13

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Synopsis
========

fbida is vulnerable to linking attacks, potentially allowing a local
user to overwrite arbitrary files.

Background
==========

fbida is a collection of image viewers and editors for the framebuffer
console and X11.

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

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  media-gfx/fbida      < 2.03-r3                         >= 2.03-r3

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

Jan Braun has discovered that the "fbgs" script provided by fbida
insecurely creates temporary files in the "/var/tmp" directory.

Impact
======

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

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All fbida users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-gfx/fbida-2.03-r3"

References
==========

  [ 1 ] CVE-2006-1695
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-1695

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

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

  http://security.gentoo.org/glsa/glsa-200604-13.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@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2006 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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