USN-1682-1: GnuPG vulnerability

Ubuntu Security Notice USN-1682-1

9th January, 2013

gnupg, gnupg2 vulnerability

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

  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 10.04 LTS
  • Ubuntu 8.04 LTS

Summary

GnuPG could be made to corrupt the keyring if it imported a specially crafted key.

Software description

  • gnupg - GNU privacy guard - a free PGP replacement
  • gnupg2 - GNU privacy guard - a free PGP replacement

Details

KB Sriram discovered that GnuPG incorrectly handled certain malformed keys.
If a user or automated system were tricked into importing a malformed key,
the GnuPG keyring could become corrupted.

Update instructions

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

Ubuntu 12.10:
gnupg2 2.0.17-2ubuntu3.1
gnupg 1.4.11-3ubuntu4.1
Ubuntu 12.04 LTS:
gnupg2 2.0.17-2ubuntu2.12.04.2
gnupg 1.4.11-3ubuntu2.2
Ubuntu 11.10:
gnupg2 2.0.17-2ubuntu2.11.10.2
gnupg 1.4.11-3ubuntu1.11.10.2
Ubuntu 10.04 LTS:
gnupg2 2.0.14-1ubuntu1.5
gnupg 1.4.10-2ubuntu1.2
Ubuntu 8.04 LTS:
gnupg 1.4.6-2ubuntu5.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2012-6085