USN-1229-1: PostgreSQL vulnerability

13 October 2011

postgresql-8.3, postgresql-8.4 vulnerability

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

  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 8.04 LTS


PostgreSQL incorrectly handled blowfish passwords.

Software Description

  • postgresql-8.4 - Object-relational SQL database
  • postgresql-8.3 - Object-relational SQL database


It was discovered that the blowfish algorithm in the pgcrypto module incorrectly handled certain 8-bit characters, resulting in the password hashes being easier to crack than expected. An attacker who could obtain the password hashes would be able to recover the plaintext with less effort.

Update instructions

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

Ubuntu 11.04
postgresql-8.4 - 8.4.9-0ubuntu0.11.04
Ubuntu 10.10
postgresql-8.4 - 8.4.9-0ubuntu0.10.10
Ubuntu 10.04 LTS
postgresql-8.4 - 8.4.9-0ubuntu0.10.04
Ubuntu 8.04 LTS
postgresql-8.3 - 8.3.16-0ubuntu0.8.04

To update your system, please follow these instructions:

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