USN-3995-2: Keepalived vulnerability

28 May 2019

keepalived vulnerability

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

  • Ubuntu 14.04 ESM
  • Ubuntu 12.04 ESM


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

Software Description

  • keepalived - Failover and monitoring daemon for LVS clusters


USN-3995-1 fixed a vulnerability in keepalived. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that Keepalived incorrectly handled certain HTTP status response codes. A remote attacker could use this issue to cause Keepalived to crash, resulting in 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 14.04 ESM
keepalived - 1:1.2.7-1ubuntu1+esm1
Ubuntu 12.04 ESM
keepalived - 1:1.2.2-3ubuntu1.2

To update your system, please follow these instructions:

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