RHSA-2008:0040: Moderate: postgresql security update

First published: Fri Feb 01 2008(Updated: )

PostgreSQL is an advanced Object-Relational database management system<br>(DBMS). The postgresql packages include the client programs and libraries<br>needed to access a PostgreSQL DBMS server.<br>Will Drewry discovered multiple flaws in PostgreSQL's regular expression<br>engine. An authenticated attacker could use these flaws to cause a denial<br>of service by causing the PostgreSQL server to crash, enter an infinite<br>loop, or use extensive CPU and memory resources while processing queries<br>containing specially crafted regular expressions. Applications that accept<br>regular expressions from untrusted sources may expose this problem to<br>unauthorized attackers. (CVE-2007-4769, CVE-2007-4772, CVE-2007-6067)<br>A privilege escalation flaw was discovered in PostgreSQL. An authenticated<br>attacker could create an index function that would be executed with<br>administrator privileges during database maintenance tasks, such as<br>database vacuuming. (CVE-2007-6600)<br>A privilege escalation flaw was discovered in PostgreSQL's Database Link<br>library (dblink). An authenticated attacker could use dblink to possibly<br>escalate privileges on systems with "trust" or "ident" authentication<br>configured. Please note that dblink functionality is not enabled by<br>default, and can only by enabled by a database administrator on systems<br>with the postgresql-contrib package installed.<br>(CVE-2007-3278, CVE-2007-6601)<br>All postgresql users should upgrade to these updated packages, which<br>include PostgreSQL 8.1.11 and 8.2.6, and resolve these issues.

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