[USN-3417-1] Libgcrypt vulnerability

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-3417-1
September 14, 2017

libgcrypt20 vulnerability
==========================================================================

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

- Ubuntu 17.04

Summary:

Libgcrypt could be made to expose sensitive information.

Software Description:
- libgcrypt20: LGPL Crypto library

Details:

Daniel Genkin, Luke Valenta, and Yuval Yarom discovered that Libgcrypt was
susceptible to an attack via side channels. A local attacker could use this
attack to recover Curve25519 private keys.

Update instructions:

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

Ubuntu 17.04:
  libgcrypt20                     1.7.6-1ubuntu0.2

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

References:
  https://www.ubuntu.com/usn/usn-3417-1
  CVE-2017-0379

Package Information:
  https://launchpad.net/ubuntu/+source/libgcrypt20/1.7.6-1ubuntu0.2


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