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