mirror of
https://github.com/php/php-src.git
synced 2026-03-28 18:22:42 +01:00
56 lines
1.0 KiB
PHP
56 lines
1.0 KiB
PHP
--TEST--
|
|
Bug #70436: Use After Free Vulnerability in unserialize()
|
|
--FILE--
|
|
<?php
|
|
|
|
class obj implements Serializable
|
|
{
|
|
var $data;
|
|
|
|
function serialize()
|
|
{
|
|
return serialize($this->data);
|
|
}
|
|
|
|
function unserialize($data)
|
|
{
|
|
$this->data = unserialize($data);
|
|
}
|
|
}
|
|
|
|
$fakezval = ptr2str(1122334455);
|
|
$fakezval .= ptr2str(0);
|
|
$fakezval .= "\x00\x00\x00\x00";
|
|
$fakezval .= "\x01";
|
|
$fakezval .= "\x00";
|
|
$fakezval .= "\x00\x00";
|
|
|
|
$inner = 'C:3:"obj":3:{ryat';
|
|
$exploit = 'a:4:{i:0;i:1;i:1;C:3:"obj":'.strlen($inner).':{'.$inner.'}i:2;s:'.strlen($fakezval).':"'.$fakezval.'";i:3;R:5;}';
|
|
|
|
$data = unserialize($exploit);
|
|
|
|
var_dump($data);
|
|
|
|
function ptr2str($ptr)
|
|
{
|
|
$out = '';
|
|
|
|
for ($i = 0; $i < 8; $i++) {
|
|
$out .= chr($ptr & 0xff);
|
|
$ptr >>= 8;
|
|
}
|
|
|
|
return $out;
|
|
}
|
|
?>
|
|
DONE
|
|
--EXPECTF--
|
|
Notice: unserialize(): Error at offset 0 of 3 bytes in %sbug70436.php on line %d
|
|
|
|
Notice: unserialize(): Error at offset 16 of 17 bytes in %sbug70436.php on line %d
|
|
|
|
Notice: unserialize(): Error at offset 93 of 94 bytes in %sbug70436.php on line %d
|
|
bool(false)
|
|
DONE
|