Several vulnerabilities have been discovered in PostgreSQL, a database server. The Common Vulnerabilities and Exposures project identifies the following problems: It was discovered that PostgreSQL did not properly verify the Common Name attribute in X.509 certificates, enabling attackers to bypass the TLS protection on client-server connections, by relying on a certificate from a trusted CA which contains an embedded NUL byte in the Common Name . Authenticated database users could elevate their privileges by creating specially-crafted index functions . The following table shows fixed source package versions for the respective distributions. oldstable/etch stable/lenny testing/unstable postgresql-7.4 7.4.27-0etch1 postgresql-8.1 8.1.19-0etch1 postgresql-8.3 8.3.9-0lenny1 8.3.9-1 postgresql-8.4 8.4.2-1 In addition to these security fixes, the updates contain reliability improvements and fix other defects. We recommend that you upgrade your PostgreSQL packages.