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This commit applies timingsafe_bcmp() to authentication paths that handle attributes or data previously compared with memcpy() or strcmp(), which are sensitive to timing attacks. The following data is concerned by this change, some being in the backend and some in the frontend: - For a SCRAM or MD5 password, the computed key or the MD5 hash compared with a password during a plain authentication. - For a SCRAM exchange, the stored key, the client's final nonce and the server nonce. - RADIUS (up to v18), the encrypted password. - For MD5 authentication, the MD5(MD5()) hash. Reported-by: Joe Conway <mail@joeconway.com> Security: CVE-2026-6478 Author: Michael Paquier <michael@paquier.xyz> Reviewed-by: John Naylor <johncnaylorls@gmail.com> Backpatch-through: 14 |
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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/.