#46437 [Opn]: data leakage because of nonexisting boundary checking in statements for MySQL41

ID: 46437 User updated by: hostmaster at uuims dot net Reported By: hostmaster at uuims dot net Status: Open Bug Type: MySQL related Operating System: Fedora Core 4 PHP Version: 5.2.6 New Comment: My email address is hostmaster at uuism dot net. Previous Comments: ------------------------------------------------------------------------ [2008-10-31 17:50:58] hostmaster at uuims dot net Description: ------------ When I run ext/mysqli/tests/bug38710.phpt with PHP 5.2.6 and MySQL 4.1.20, the scripts fails in a manner not anticipated by the test script. The $text consists of 8240 a's followed by a string of non-printable characters (cat -v shows "^@^@^@^Y^@^@^@^M ^@^@M-t^OM-TM-7M-0LM-TM-7M-^@WM^H^@^@^@^@M--M-^F^A^@^Y^@^@^@"), followed by more a's with the non-printable characters repeated every 8000 a's or so. The string $text is not equal to str_repeat('a', 8191) for mysqli_get_server_version($db)=401020, so the ACTUAL output is: int(100000) Done Thanks. Jim Reproduce code: --------------- <?php include "connect.inc"; $db = new mysqli($host, $user, $passwd, "test"); $qry=$db->stmt_init(); $qry->prepare("SELECT REPEAT('a',100000)"); $qry->execute(); $qry->bind_result($text); $qry->fetch(); if ($text !== str_repeat('a', mysqli_get_server_version($db) > 50110? 100000:(mysqli_get_server_version($db)>=50000? 8193:8191))) { var_dump(strlen($text)); } echo "Done"; ?> Expected result: ---------------- It should pass since this is expected behavior for MySQL prior to version 5.1 Actual result: -------------- It failed ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=46437&edit=1