bugtraq - [ GLSA 200801-14 ] Blam: User-assisted execution of arbitrary code

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Date: Sun, 27 Jan 2008 18:08:30 +0100
From: Robert Buchholz <rbu@...too.org>
To: gentoo-announce@...too.org
Cc: bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200801-14 ] Blam: User-assisted execution of arbitrary code

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Gentoo Linux Security Advisory                           GLSA 200801-14
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Blam: User-assisted execution of arbitrary code
      Date: January 27, 2008
      Bugs: #199841
        ID: 200801-14

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Synopsis
========

Blam doesn't properly handle environment variables, potentially
allowing a local attacker to execute arbitrary code.

Background
==========

Blam is an RSS and Atom feed reader for GNOME written in C#.

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

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  net-news/blam       < 1.8.4                              >= 1.8.4

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

The "/usr/bin/blam" script sets the "LD_LIBRARY_PATH" environment
variable incorrectly, which might result in the current working
directory (.) being included when searching for dynamically linked
libraries of the Mono Runtime application.

Impact
======

A local attacker could entice a user to run Blam in a directory
containing a specially crafted library file which could result in the
execution of arbitrary code with the privileges of the user running
Blam.

Workaround
==========

Do not run Blam from an untrusted working directory.

Resolution
==========

All Blam users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-news/blam-1.8.4"

References
==========

  [ 1 ] CVE-2005-4790
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4790

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

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

  http://security.gentoo.org/glsa/glsa-200801-14.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 2008 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/2.5

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