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Any OS user able to access the socket can connect as the bootstrap superuser and in turn execute arbitrary code as the OS user running the test. Protect against that by placing the socket in the temporary data directory, which has mode 0700 thanks to initdb. Back-patch to 8.4 (all supported versions). The hazard remains wherever the temporary cluster accepts TCP connections, notably on Windows. Attempts to run "make check" from a directory with a long name will now fail. An alternative not sharing that problem was to place the socket in a subdirectory of /tmp, but that is only secure if /tmp is sticky. The PG_REGRESS_SOCK_DIR environment variable is available as a workaround when testing from long directory paths. As a convenient side effect, this lets testing proceed smoothly in builds that override DEFAULT_PGSOCKET_DIR. Popular non-default values like /var/run/postgresql are often unwritable to the build user. Security: CVE-2014-0067
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/.