USN-3066-1: PostgreSQL vulnerabilities

18 August 2016

postgresql-9.1, postgresql-9.3, postgresql-9.5 vulnerabilities

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

  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


Several security issues were fixed in PostgreSQL.

Software Description

  • postgresql-9.5 - object-relational SQL database
  • postgresql-9.3 - Object-relational SQL database
  • postgresql-9.1 - Object-relational SQL database


Heikki Linnakangas discovered that PostgreSQL incorrectly handled certain nested CASE/WHEN expressions. A remote attacker could possibly use this issue to cause PostgreSQL to crash, resulting in a denial of service. (CVE-2016-5423)

Nathan Bossart discovered that PostgreSQL incorrectly handled special characters in database and role names. A remote attacker could possibly use this issue to escalate privileges. (CVE-2016-5424)

Update instructions

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

Ubuntu 16.04 LTS
postgresql-9.5 - 9.5.4-0ubuntu0.16.04
Ubuntu 14.04 LTS
postgresql-9.3 - 9.3.14-0ubuntu0.14.04
Ubuntu 12.04 LTS
postgresql-9.1 - 9.1.23-0ubuntu0.12.04

To update your system, please follow these instructions:

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.