=========================================================================Ubuntu Security Notice USN-2555-1
April 01, 2015

libgcrypt11, libgcrypt20 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in Libgcrypt.

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.
(CVE-2014-3591)

Daniel Genkin, Adi Shamir, 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. (CVE-2015-0837)

Update instructions:

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

Ubuntu 14.10:
  libgcrypt11                     1.5.4-2ubuntu1.1
  libgcrypt20                     1.6.1-2ubuntu1.14.10.1

Ubuntu 14.04 LTS:
  libgcrypt11                     1.5.3-2ubuntu4.2

Ubuntu 12.04 LTS:
  libgcrypt11                     1.5.0-3ubuntu0.4

Ubuntu 10.04 LTS:
  libgcrypt11                     1.4.4-5ubuntu2.4

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-2555-1
  CVE-2014-3591, CVE-2015-0837

Package Information:
  https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.4-2ubuntu1.1
  https://launchpad.net/ubuntu/+source/libgcrypt20/1.6.1-2ubuntu1.14.10.1
  https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.3-2ubuntu4.2
  https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.0-3ubuntu0.4
  https://launchpad.net/ubuntu/+source/libgcrypt11/1.4.4-5ubuntu2.4