USN-2896-1: Libgcrypt vulnerability

Ubuntu Security Notice USN-2896-1

15th 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

• libgcrypt11 - LGPL Crypto library
• libgcrypt20 - 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 version:

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

CVE-2015-7511