USN-4000-1: Corosync vulnerability

30 May 2019

corosync vulnerability

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

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS


Corosync could be made to crash or execute arbitrary code if it received a specially crafted request.

Software Description

  • corosync - cluster engine daemon and utilities


It was discovered that Corosync incorrectly handled certain requests. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code.

Update instructions

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

Ubuntu 18.04 LTS
corosync - 2.4.3-0ubuntu1.1
libtotem-pg5 - 2.4.3-0ubuntu1.1
Ubuntu 16.04 LTS
corosync - 2.3.5-3ubuntu2.3
libtotem-pg5 - 2.3.5-3ubuntu2.3

To update your system, please follow these instructions:

After a standard system update you need to restart Corosync to make all the necessary changes.