USN-4027-1: PostgreSQL vulnerability

20 June 2019

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



  • postgresql-10 - Object-relational SQL database
  • postgresql-11 - Object-relational SQL database


Alexander Lakhin discovered that PostgreSQL incorrectly handled
authentication. An authenticated attacker or a rogue server could use this
issue to cause PostgreSQL to crash, resulting in a denial of service, or
possibly execute arbitrary code. The default compiler options for affected
releases should reduce the vulnerability to a denial of service.

Update instructions

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

Ubuntu 19.04
Ubuntu 18.10
Ubuntu 18.04

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart PostgreSQL to
make all the necessary changes.