USN-970-1: GnuPG2 vulnerability

11 August 2010

gnupg2 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 10.04 LTS
  • Ubuntu 9.10
  • Ubuntu 9.04
  • Ubuntu 8.04 LTS


Software Description

  • gnupg2


It was discovered that GPGSM in GnuPG2 did not correctly handle certificates with a large number of Subject Alternate Names. If a user or automated system were tricked into processing a specially crafted certificate, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 10.04 LTS
gpgsm - 2.0.14-1ubuntu1.2
Ubuntu 9.10
gpgsm - 2.0.12-0ubuntu2.1
Ubuntu 9.04
gpgsm - 2.0.9-3.1ubuntu0.1
Ubuntu 8.04 LTS
gpgsm - 2.0.7-1ubuntu0.1

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.