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 discoveredthat Libgcrypt was susceptible to an attack via physical side channels. Alocal 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 Source: ubuntu-usn