USN-2339-1: GnuPG vulnerability

3 September 2014

gnupg vulnerability

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

  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Summary

GnuPG could expose sensitive information when performing decryption.

Software Description

  • gnupg - GNU privacy guard - a free PGP replacement

Details

Daniel Genkin, Adi Shamir, and Eran Tromer discovered that GnuPG was susceptible to an adaptive chosen ciphertext attack via physical side channels. A local attacker could use this attack to possibly recover private keys.

Update instructions

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

Ubuntu 12.04 LTS
gnupg - 1.4.11-3ubuntu2.7
Ubuntu 10.04 LTS
gnupg - 1.4.10-2ubuntu1.7

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