USN-2339-2: Libgcrypt vulnerability

3 September 2014

libgcrypt11 vulnerability

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

  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Summary

Libgcrypt could expose sensitive information when performing decryption.

Software Description

  • libgcrypt11 - LGPL Crypto library

Details

Daniel Genkin, Adi Shamir, and Eran Tromer discovered that Libgcrypt 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 14.04 LTS
libgcrypt11 - 1.5.3-2ubuntu4.1
Ubuntu 12.04 LTS
libgcrypt11 - 1.5.0-3ubuntu0.3
Ubuntu 10.04 LTS
libgcrypt11 - 1.4.4-5ubuntu2.3

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