USN-876-1: PostgreSQL vulnerabilities

Ubuntu Security Notice USN-876-1

3rd January, 2010

postgresql-8.1, postgresql-8.3, postgresql-8.4 vulnerabilities

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

  • Ubuntu 9.10
  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS

Software description

  • postgresql-8.1
  • postgresql-8.3
  • postgresql-8.4


It was discovered that PostgreSQL did not properly handle certificates with
NULL characters in the Common Name field of X.509 certificates. An attacker
could exploit this to perform a man in the middle attack to view sensitive
information or alter encrypted communications. (CVE-2009-4034)

It was discovered that PostgreSQL did not properly manage session-local
state. A remote authenticated user could exploit this to escalate
priviliges within PostgreSQL. (CVE-2009-4136)

Update instructions

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

Ubuntu 9.10:
postgresql-8.4 8.4.2-0ubuntu9.10
Ubuntu 9.04:
postgresql-8.3 8.3.9-0ubuntu9.04
Ubuntu 8.10:
postgresql-8.3 8.3.9-0ubuntu8.10
Ubuntu 8.04 LTS:
postgresql-8.3 8.3.9-0ubuntu8.04
Ubuntu 6.06 LTS:
postgresql-8.1 8.1.19-0ubuntu0.6.06

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the
necessary changes.


CVE-2009-4034, CVE-2009-4136