The dochangetype function in fs/namespace.c in the Linux kernel before 2.6.22 does not verify that the caller has the CAPSYSADMIN capability, which allows local users to gain privileges or cause a denial of service by modifying the properties of a mountpoint.

Quoting upstream PostgreSQL security page: http://www.postgresql.org/support/security.html

If PostgreSQL is configured with LDAP authentication, and your LDAP configuration allows anonymous binds, it is possible for a user to authenticate themselves with an empty password.

Affected versions: 8.3, 8.2

Fixed in versions: 8.3.8, 8.2.14

Severity: A - A vulnerability that is exploitable for privilege escalation without requiring a prior login.