A new security update has been released for Gentoo Linux - Blam: User-assisted execution of arbitrary code. Here the announcement:

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@gentoo.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