USN-3995-1: Keepalived vulnerability

28 May 2019

keepalived vulnerability

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

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS


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


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 18.10
keepalived - 1:1.3.9-1ubuntu1.1
Ubuntu 18.04 LTS
keepalived - 1:1.3.9-1ubuntu0.18.04.2
Ubuntu 16.04 LTS
keepalived - 1:1.2.24-1ubuntu0.16.04.2

To update your system, please follow these instructions:

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