Ubuntu Security Notice USN-3995-1
May 28, 2019
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.
– 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
The problem can be corrected by updating your system to the following
Ubuntu 18.04 LTS:
Ubuntu 16.04 LTS:
In general, a standard system update will make all the necessary changes.