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Peter Eisentraut 20f870fd7c Fix several one-byte buffer over-reads in to_number 
Several places in NUM_numpart_from_char(), which is called from the SQL
function to_number(text, text), could accidentally read one byte past
the end of the input buffer (which comes from the input text datum and
is not null-terminated).

1. One leading space character would be skipped, but there was no check
   that the input was at least one byte long.  This does not happen in
   practice, but for defensiveness, add a check anyway.

2. Commit 4a3a1e2cf apparently accidentally doubled that code that skips
   one space character (so that two spaces might be skipped), but there
   was no overflow check before skipping the second byte.  Fix by
   removing that duplicate code.

3. A logic error would allow a one-byte over-read when looking for a
   trailing sign (S) placeholder.

In each case, the extra byte cannot be read out directly, but looking at
it might cause a crash.

The third item was discovered by Piotr Stefaniak, the first two were
found and analyzed by Tom Lane and Peter Eisentraut.
2016-08-08 11:13:34 -04:00
config Fix configure's incorrect version tests for flex and perl. 2016-05-02 11:18:11 -04:00
contrib Obstruct shell, SQL, and conninfo injection via database and role names. 2016-08-08 10:07:51 -04:00
doc Introduce a psql "\connect -reuse-previous=on|off" option. 2016-08-08 10:07:51 -04:00
src Fix several one-byte buffer over-reads in to_number 2016-08-08 11:13:34 -04:00
.dir-locals.el Update Emacs configuration 2013-08-13 20:08:44 -04:00
.gitattributes gitattributes: Ignore time zone data files for whitespace checks 2014-07-22 00:12:28 -04:00
.gitignore Add *.pot to .gitignore 2013-10-19 10:56:52 -04:00
aclocal.m4 Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
configure Stamp 9.4.8. 2016-05-09 16:52:03 -04:00
configure.in Stamp 9.4.8. 2016-05-09 16:52:03 -04:00
COPYRIGHT Update copyright for 2016 2016-01-02 13:33:39 -05:00
GNUmakefile.in Add TAP tests for client programs 2014-04-14 21:33:46 -04:00
HISTORY Improve text of stub HISTORY file. 2014-02-12 18:16:17 -05:00
Makefile Allow make check in PL directories 2011-02-15 06:52:12 +02:00
README Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:04 -05:00
README.git Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:04 -05:00

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:

	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/.