1--TEST-- 2Bug #72562: Use After Free in unserialize() with Unexpected Session Deserialization 3--EXTENSIONS-- 4session 5--SKIPIF-- 6<?php include('skipif.inc'); ?> 7--FILE-- 8<?php 9 10ini_set('session.serialize_handler', 'php_binary'); 11session_start(); 12$sess = "\x1xi:1;\x2y"; 13session_decode($sess); 14$uns_1 = '{'; 15$out_1[] = unserialize($uns_1); 16unset($out_1); 17$fakezval = ptr2str(1122334455); 18$fakezval .= ptr2str(0); 19$fakezval .= "\x00\x00\x00\x00"; 20$fakezval .= "\x01"; 21$fakezval .= "\x00"; 22$fakezval .= "\x00\x00"; 23for ($i = 0; $i < 5; $i++) { 24 $v[$i] = $fakezval.$i; 25} 26$uns_2 = 'R:2;'; 27$out_2 = unserialize($uns_2); 28var_dump($out_2); 29 30function ptr2str($ptr) 31{ 32 $out = ''; 33 for ($i = 0; $i < 8; $i++) { 34 $out .= chr($ptr & 0xff); 35 $ptr >>= 8; 36 } 37 return $out; 38} 39?> 40--EXPECTF-- 41Warning: session_decode(): Failed to decode session object. Session has been destroyed in %s%ebug72562.php on line %d 42 43Warning: unserialize(): Error at offset 0 of 1 bytes in %s on line %d 44 45Warning: unserialize(): Error at offset 4 of 4 bytes in %s on line %d 46bool(false) 47
