USN-3853-1: GnuPG vulnerability

10 January 2019

gnupg2 vulnerability

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

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS


GnuPG could allow unintended access to network services.

Software Description

  • gnupg2 - GNU privacy guard - a free PGP replacement


Ben Fuhrmannek discovered that GnuPG incorrectly handled Web Key Directory lookups. A remote attacker could possibly use this issue to cause a denial of service, or perform Cross-Site Request Forgery attacks.

Update instructions

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

Ubuntu 18.10
gnupg - 2.2.8-3ubuntu1.1
gpg-wks-client - 2.2.8-3ubuntu1.1
Ubuntu 18.04 LTS
gnupg - 2.2.4-1ubuntu1.2
gpg-wks-client - 2.2.4-1ubuntu1.2

To update your system, please follow these instructions:

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