USN-3689-1: Libgcrypt vulnerability

19 June 2018

libgcrypt11, libgcrypt20 vulnerability

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

• Ubuntu 18.04 LTS
• Ubuntu 17.10
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS

Summary

Libgcrypt could be made to expose sensitive information.

Software Description

• libgcrypt20 - LGPL Crypto library
• libgcrypt11 - LGPL Crypto library

Details

Keegan Ryan discovered that Libgcrypt was susceptible to a side-channel attack. A local attacker could possibly use this attack to recover ECDSA private keys.

Update instructions

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

Ubuntu 18.04 LTS

libgcrypt20 - 1.8.1-4ubuntu1.1

Ubuntu 17.10

libgcrypt20 - 1.7.8-2ubuntu1.1

Ubuntu 16.04 LTS

libgcrypt20 - 1.6.5-2ubuntu0.5

Ubuntu 14.04 LTS

libgcrypt11 - 1.5.3-2ubuntu4.6

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

from Ubuntu Security Notices https://ift.tt/2K4aNby