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Ubuntu Security Notice USN-3995-2
May 28, 2019

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

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

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

Details:

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

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

References:
  https://usn.ubuntu.com/usn/usn-3995-2
  https://usn.ubuntu.com/usn/usn-3995-1
  CVE-2018-19115