A new security update has been released for Gentoo Linux - Adobe Reader: User-assisted execution of arbitrary code. Here the announcement:
"Gentoo Linux Security Advisory GLSA 200808-10
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http://security.gentoo.org/
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Severity: Normal
Title: Adobe Reader: User-assisted execution of arbitrary code
Date: August 09, 2008
Bugs: #233383
ID: 200808-10

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Synopsis
========

Adobe Reader is vulnerable to execution of arbitrary code via a crafted
PDF.

Background
==========

Adobe Reader (formerly Adobe Acrobat Reader) is a closed-source PDF
reader.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-text/acroread < 8.1.2-r3 >= 8.1.2-r3

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

The Johns Hopkins University Applied Physics Laboratory reported that
input to an unspecified JavaScript method is not properly validated.

Impact
======

A remote attacker could entice a user to open a specially crafted PDF
document, possibly resulting in the remote execution of arbitrary code
with the privileges of the user.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Adobe Reader users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/acroread-8.1.2-r3"

References
==========

[ 1 ] CVE-2008-2641
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2641

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

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

http://security.gentoo.org/glsa/glsa-200808-10.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
"


GLSA 200806-05 cbrPager: User-assisted execution of arbitrary code
Researcher slams Adobe for ‘epidemic’ of JavaScript bugs
GLSA 200807-15 Pan: User-assisted execution of arbitrary code