Ubuntu Security Notice USN-834-1
21st September, 2009
postgresql-8.1, postgresql-8.3 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 9.04
- Ubuntu 8.10
- Ubuntu 8.04 LTS
- Ubuntu 6.06 LTS
Software description
- postgresql-8.1
- postgresql-8.3
Details
It was discovered that PostgreSQL could be made to unload and reload an
already loaded module by using the LOAD command. A remote authenticated
attacker could exploit this to cause a denial of service. This issue did
not affect Ubuntu 6.06 LTS. (CVE-2009-3229)
Due to an incomplete fix for CVE-2007-6600, RESET ROLE and RESET SESSION
AUTHORIZATION operations were allowed inside security-definer functions. A
remote authenticated attacker could exploit this to escalate privileges
within PostgreSQL. (CVE-2009-3230)
It was discovered that PostgreSQL did not properly perform LDAP
authentication under certain circumstances. When configured to use LDAP
with anonymous binds, a remote attacker could bypass authentication by
supplying an empty password. This issue did not affect Ubuntu 6.06 LTS.
(CVE-2009-3231)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 9.04:
- postgresql-8.3 8.3.8-0ubuntu9.04
- Ubuntu 8.10:
- postgresql-8.3 8.3.8-0ubuntu8.10
- Ubuntu 8.04 LTS:
- postgresql-8.3 8.3.8-0ubuntu8.04
- Ubuntu 6.06 LTS:
- postgresql-8.1 8.1.18-0ubuntu0.6.06
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system upgrade is sufficient to effect the
necessary changes.