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d3cfe20c6d
The code wrote a value into the caller's field[] array before checking to see if there was room, which of course is backwards. Per report from Michael Paquier. I fixed the equivalent bug in the backend's version of this code way back in 630684d3a130bb93, but failed to think about ecpg's copy. Fortunately this doesn't look like it would be exploitable for anything worse than a core dump: an external attacker would have no control over the single word that gets written.
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: http://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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.