USN-4050-1: ZeroMQ vulnerability

8 July 2019

zeromq3 vulnerability

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

  • Ubuntu 19.04
  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS


ZeroMQ could be made to crash or run programs if it received specially crafted network traffic.

Software Description

  • zeromq3 - lightweight messaging kernel


It was discovered that ZeroMQ incorrectly handled certain application metadata. A remote attacker could use this issue to cause ZeroMQ to crash, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 19.04
libzmq5 - 4.3.1-3ubuntu2.1
Ubuntu 18.10
libzmq5 - 4.2.5-2ubuntu0.2
Ubuntu 18.04 LTS
libzmq5 - 4.2.5-1ubuntu0.2
Ubuntu 16.04 LTS
libzmq5 - 4.1.4-7ubuntu0.1

To update your system, please follow these instructions:

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