GLSA 200612-03 GnuPG: Multiple vulnerabilities
Posted on: 12/10/2006 02:55 PM

A new security update has been released for Gentoo Linux - GnuPG: Multiple vulnerabilities. Here the announcement:

Gentoo Linux Security Advisory GLSA 200612-03
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http://security.gentoo.org/
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Severity: Normal
Title: GnuPG: Multiple vulnerabilities
Date: December 10, 2006
Bugs: #156476, #156947
ID: 200612-03

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Synopsis
========

GnuPG is vulnerable to a buffer overflow and an erroneous function
pointer dereference that can result in the execution of arbitrary code.

Background
==========

The GNU Privacy Guard, GnuPG, is a free replacement for the PGP suite
of cryptographic software.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-crypt/gnupg lt; 1.4.6 gt;= 1.4.6

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

Hugh Warrington has reported a boundary error in GnuPG, in the
"ask_outfile_name()" function from openfile.c: the
make_printable_string() function could return a string longer than
expected. Additionally, Tavis Ormandy of the Gentoo Security Team
reported a design error in which a function pointer can be incorrectly
dereferenced.

Impact
======

A remote attacker could entice a user to interactively use GnuPG on a
crafted file and trigger the boundary error, which will result in a
buffer overflow. They could also entice a user to process a signed or
encrypted file with gpg or gpgv, possibly called through another
application like a mail client, to trigger the dereference error. Both
of these vulnerabilities would result in the execution of arbitrary
code with the permissions of the user running GnuPG. gpg-agent, gpgsm
and other tools are not affected.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GnuPG users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=app-crypt/gnupg-1.4.6"

References
==========

[ 1 ] CVE-2006-6169
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6169
[ 2 ] CVE-2006-6235
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6235

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

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

http://security.gentoo.org/glsa/glsa-200612-03.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 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/2.5



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