GLSA 200503-29: GnuPG: OpenPGP protocol attack
Posted on: 03/25/2005 06:42 AM

A GnuPG security update has been released for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200503-29
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http://security.gentoo.org/
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Severity: Low
Title: GnuPG: OpenPGP protocol attack
Date: March 24, 2005
Bugs: #85547
ID: 200503-29

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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
================

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Package / Vulnerable / Unaffected
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1 app-crypt/gnupg lt; 1.4.1 gt;= 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 "gt;=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


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