USN-2896-1: Libgcrypt vulnerability

15 February 2016

libgcrypt11, libgcrypt20 vulnerability

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

  • Ubuntu 15.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

Summary

Libgcrypt could be made to expose sensitive information.

Software Description

  • libgcrypt20 - LGPL Crypto library
  • libgcrypt11 - LGPL Crypto library

Details

Daniel Genkin, Lev Pachmanov, Itamar Pipman and Eran Tromer discovered that Libgcrypt was susceptible to an 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 15.10
libgcrypt20 - 1.6.3-2ubuntu1.1
Ubuntu 14.04 LTS
libgcrypt11 - 1.5.3-2ubuntu4.3
Ubuntu 12.04 LTS
libgcrypt11 - 1.5.0-3ubuntu0.5

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