USN-3466-1: systemd vulnerability

26 October 2017

systemd vulnerability

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

  • Ubuntu 17.10
  • Ubuntu 17.04

Summary

systemd could be made to temporarily stop responding if it received specially crafted network traffic.

Software Description

  • systemd - system and service manager

Details

Karim Hossen & Thomas Imbert and Nelson William Gamazo Sanchez independently discovered that systemd-resolved incorrectly handled certain DNS responses. A remote attacker could possibly use this issue to cause systemd to temporarily stop responding, resulting in a denial of service.

Update instructions

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

Ubuntu 17.10
systemd - 234-2ubuntu12.1
Ubuntu 17.04
systemd - 232-21ubuntu7.1

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