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

Summary

GnuPG could allow unintended access to network services.

Software Description

• gnupg2 - GNU privacy guard - a free PGP replacement

Details

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: https://wiki.ubuntu.com/Security/Upgrades.

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

References

from Ubuntu Security Notices http://bit.ly/2FnAO2N