USN-4236-1: Libgcrypt vulnerability

13 January 2020

libgcrypt20 vulnerability

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

  • Ubuntu 19.10
  • Ubuntu 19.04
  • Ubuntu 18.04 LTS


Libgcrypt could be made to expose sensitive information.

Software Description

  • libgcrypt20 - LGPL Crypto library


It was discovered that Libgcrypt was susceptible to a ECDSA timing attack. An attacker could possibly use this attack to recover sensitive information.

Update instructions

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

Ubuntu 19.10
libgcrypt20 - 1.8.4-5ubuntu2.1
Ubuntu 19.04
libgcrypt20 - 1.8.4-3ubuntu1.1
Ubuntu 18.04 LTS
libgcrypt20 - 1.8.1-4ubuntu1.2

To update your system, please follow these instructions:

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