USN-4149-1: Unbound vulnerability

8 October 2019

unbound vulnerability

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

  • Ubuntu 19.04

Summary

Unbound could be made to crash if it received a specially crafted NOTIFY query.

Software Description

  • unbound - validating, recursive, caching DNS resolver

Details

It was discovered that Unbound incorrectly handled certain NOTIFY queries. An attacker could possibly use this issue to cause a denial of service.

Update instructions

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

Ubuntu 19.04
libunbound8 - 1.9.0-2ubuntu0.1
unbound - 1.9.0-2ubuntu0.1

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