Date: Thu, 24 Mar 2005 22:52:14 +0100
From: Thierry Carrez <koon@gentoo.org.>
To: gentoo-announce@robin.gentoo.org
Subject: [ GLSA 200503-29 ] GnuPG: OpenPGP protocol attack
X-Enigmail-Version: 0.89.5.0
X-Enigmail-Supports: pgp-inline, pgp-mime
Content-Type: multipart/signed; micalg=pgp-sha1;
protocol="application/pgp-signature";
boundary="------------enigEF5CF5206AC5CA39D5F767AE"
X-Virus-Scanned: antivirus-gw at tyumen.ru
This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enigEF5CF5206AC5CA39D5F767AE
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200503-29
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Low
Title: GnuPG: OpenPGP protocol attack
Date: March 24, 2005
Bugs: #85547
ID: 200503-29
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
Automated systems using GnuPG may leak plaintext portions of an
encrypted message.
Background
==========
GnuPG is complete and free replacement for PGP, a tool for secure
communication and data storage.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-crypt/gnupg < 1.4.1 >= 1.4.1
Description
===========
A flaw has been identified in an integrity checking mechanism of the
OpenPGP protocol.
Impact
======
An automated system using GnuPG that allows an attacker to repeatedly
discover the outcome of an integrity check (perhaps by observing the
time required to return a response, or via overly verbose error
messages) could theoretically reveal a small portion of plaintext.
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 ">=app-crypt/gnupg-1.4.1"
References
==========
[ 1 ] CERT VU#303094
http://www.kb.cert.org/vuls/id/303094
[ 2 ] CAN-2005-0366
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0366
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200503-29.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 2005 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
--------------enigEF5CF5206AC5CA39D5F767AE
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.6 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iD8DBQFCQzaTvcL1obalX08RAuwHAJ9BGoRtqAim7RI+JEpnafdTSd6BhQCgg5eQ
kL6OV0UTgLNKZhOPpLu7xe8=
=04mz
-----END PGP SIGNATURE-----
--------------enigEF5CF5206AC5CA39D5F767AE--
