[USN-3347-2] Libgcrypt vulnerability

Leonidas S. Barbosa leo.barbosa at canonical.com
Mon Jul 17 19:05:45 UTC 2017

Ubuntu Security Notice USN-3347-2
July 17, 2017

libgcrypt11 vulnerability

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

- Ubuntu 12.04 ESM


Several security issues were fixed in Libgcrypt.

Software Description:
- libgcrypt11: LGPL Crypto library


USN-3347-1 fixed a vulnerability in Libgcrypt. This update provides the
corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot
 Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal,
 Yuval Yarom discovered that Libgcrypt was susceptible to an attack via
 side channels. A local attacker could use this attack to recover RSA
 private keys. (CVE-2017-7526)

Update instructions:

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

Ubuntu 12.04 ESM:
  libgcrypt11                     1.5.0-3ubuntu0.7

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

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