USN-3417-1: Libgcrypt vulnerability

USN-3417-1: Libgcrypt vulnerability

Ubuntu Security Notice USN-3417-1

14th September, 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 version:

Ubuntu 17.04:

libgcrypt20

1.7.6-1ubuntu0.2

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-2017-0379

Source: USN-3417-1: Libgcrypt vulnerability