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With GB18030 as source encoding, applications could crash the server via SQL functions convert() or convert_from(). Applications themselves could crash after passing unterminated GB18030 input to libpq functions PQescapeLiteral(), PQescapeIdentifier(), PQescapeStringConn(), or PQescapeString(). Extension code could crash by passing unterminated GB18030 input to jsonapi.h functions. All those functions have been intended to handle untrusted, unterminated input safely. A crash required allocating the input such that the last byte of the allocation was the last byte of a virtual memory page. Some malloc() implementations take measures against that, making the SIGSEGV hard to reach. Back-patch to v13 (all supported versions). Author: Noah Misch <noah@leadboat.com> Author: Andres Freund <andres@anarazel.de> Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com> Backpatch-through: 13 Security: CVE-2025-4207 |
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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/.