USN-3228-1: libevent vulnerabilities

13 March 2017

libevent vulnerabilities

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

  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


Several security issues were fixed in libevent.

Software Description

  • libevent - Asynchronous event notification library


Guido Vranken discovered that libevent incorrectly handled memory when processing certain data. A remote attacker could possibly use this issue with an application that uses libevent to cause a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 16.10
libevent-2.0-5 - 2.0.21-stable-2ubuntu0.16.10.1
Ubuntu 16.04 LTS
libevent-2.0-5 - 2.0.21-stable-2ubuntu0.16.04.1
Ubuntu 14.04 LTS
libevent-2.0-5 - 2.0.21-stable-1ubuntu1.14.04.2
Ubuntu 12.04 LTS
libevent-2.0-5 - 2.0.16-stable-1ubuntu0.2

To update your system, please follow these instructions:

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