[ GLSA 201110-15 ] GnuPG: User-assisted execution of arbitrary code

[GLSA]

Gentoo Linux Security Advisory

Title: GnuPG: User-assisted execution of arbitrary code (GLSA 201110-15)
Severity: normal
Exploitable: remote
Date: October 22, 2011
Bug(s): #329583
ID: 201110-15

Synopsis

The GPGSM utility included in GnuPG contains a use-after-free
vulnerability that may allow an unauthenticated remote attacker to execute
arbitrary code.


Background

The GNU Privacy Guard, GnuPG, is a free replacement for the PGP suite of
cryptographic software. The GPGSM utility in GnuPG is responsible for
processing X.509 certificates, signatures and encryption as well as
S/MIME messages.


Affected Packages

Package: app-crypt/gnupg
Vulnerable: < 2.0.16-r1
Unaffected: >= 2.0.16-r1
Unaffected: < 2.0
Architectures: All supported architectures


Description

The GPGSM utility in GnuPG contains a use-after-free vulnerability that
may be exploited when importing a crafted X.509 certificate explicitly or
during the signature verification process.


Impact

An unauthenticated remote attacker may execute arbitrary code with the
privileges of the user running GnuPG by enticing them to import a crafted
certificate.


Workaround

There is no known workaround at this time.

Resolution

All GnuPG 2.x users should upgrade to the latest version: