GnuPG: User-assisted execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 201110-15 / GnuPG
Release Date	October 22, 2011
Latest Revision	October 22, 2011: 1
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-crypt/gnupg	< 2.0.16-r1	>= 2.0.16-r1, < 2.0	All supported architectures

Related bugreports: #329583

Synopsis

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

2. Impact Information

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.

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.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

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

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-crypt/gnupg-2.0.16-r1"

4. References

CVE-2010-2547

Page updated October 22, 2011

Summary: This is a Gentoo Linux Security Advisory

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