USN-3390-1: PostgreSQL vulnerabilities

15 August 2017

postgresql-9.3, postgresql-9.5, postgresql-9.6 vulnerabilities

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

  • Ubuntu 17.04
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in PostgreSQL.

Software Description

  • postgresql-9.6 - object-relational SQL database
  • postgresql-9.5 - Object-relational SQL database
  • postgresql-9.3 - Object-relational SQL database

Details

Ben de Graaff, Jelte Fennema, and Jeroen van der Ham discovered that PostgreSQL allowed the use of empty passwords in some authentication methods, contrary to expected behaviour. A remote attacker could use an empty password to authenticate to servers that were believed to have password login disabled. (CVE-2017-7546)

Jeff Janes discovered that PostgreSQL incorrectly handled the pg_user_mappings catalog view. A remote attacker without server privileges could possibly use this issue to obtain certain passwords. (CVE-2017-7547)

Chapman Flack discovered that PostgreSQL incorrectly handled lo_put() permissions. A remote attacker could possibly use this issue to change the data in a large object. (CVE-2017-7548)

Update instructions

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

Ubuntu 17.04
postgresql-9.6 - 9.6.4-0ubuntu0.17.04.1
Ubuntu 16.04 LTS
postgresql-9.5 - 9.5.8-0ubuntu0.16.04.1
Ubuntu 14.04 LTS
postgresql-9.3 - 9.3.18-0ubuntu0.14.04.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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.

References