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Substituting such values in extension scripts facilitated SQL injection when @extowner@, @extschema@, or @extschema:...@ appeared inside a quoting construct (dollar quoting, '', or ""). No bundled extension was vulnerable. Vulnerable uses do appear in a documentation example and in non-bundled extensions. Hence, the attack prerequisite was an administrator having installed files of a vulnerable, trusted, non-bundled extension. Subject to that prerequisite, this enabled an attacker having database-level CREATE privilege to execute arbitrary code as the bootstrap superuser. By blocking this attack in the core server, there's no need to modify individual extensions. Back-patch to v11 (all supported versions). Reported by Micah Gate, Valerie Woolard, Tim Carey-Smith, and Christoph Berg. Security: CVE-2023-39417 |
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PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.