GLSA 200503-29: GnuPG: OpenPGP protocol attack

http://security.gentoo.org/

Severity:	low
Title:	GnuPG: OpenPGP protocol attack
Date:	03/24/2005
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	Architecture(s)
app-crypt/gnupg	< 1.4.1	>= 1.4.1	All supported architectures

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

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 https://bugs.gentoo.org.