3d2aed664e
Historically, pg_dump has "set search_path = foo, pg_catalog" when dumping an object in schema "foo", and has also caused that setting to be used while restoring the object. This is problematic because functions and operators in schema "foo" could capture references meant to refer to pg_catalog entries, both in the queries issued by pg_dump and those issued during the subsequent restore run. That could result in dump/restore misbehavior, or in privilege escalation if a nefarious user installs trojan-horse functions or operators. This patch changes pg_dump so that it does not change the search_path dynamically. The emitted restore script sets the search_path to what was used at dump time, and then leaves it alone thereafter. Created objects are placed in the correct schema, regardless of the active search_path, by dint of schema-qualifying their names in the CREATE commands, as well as in subsequent ALTER and ALTER-like commands. Since this change requires a change in the behavior of pg_restore when processing an archive file made according to this new convention, bump the archive file version number; old versions of pg_restore will therefore refuse to process files made with new versions of pg_dump. Security: CVE-2018-1058 |
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| README.git | ||
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README
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/.