69 lines
1.1 KiB
PHP
69 lines
1.1 KiB
PHP
--TEST--
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Bug #70172 - Use After Free Vulnerability in unserialize()
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--FILE--
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<?php
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class obj implements Serializable {
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var $data;
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function serialize() {
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return serialize($this->data);
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}
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function unserialize($data) {
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$this->data = unserialize($data);
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}
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}
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class obj2 {
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var $ryat;
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function __wakeup() {
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$this->ryat = 1;
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}
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}
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$fakezval = ptr2str(1122334455);
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$fakezval .= ptr2str(0);
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$fakezval .= "\x00\x00\x00\x00";
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$fakezval .= "\x01";
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$fakezval .= "\x00";
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$fakezval .= "\x00\x00";
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$inner = 'r:2;';
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$exploit = 'a:2:{i:0;O:4:"obj2":1:{s:4:"ryat";C:3:"obj":'.strlen($inner).':{'.$inner.'}}i:1;a:1:{i:0;a:1:{i:0;R:4;}}}';
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$data = unserialize($exploit);
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for ($i = 0; $i < 5; $i++) {
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$v[$i] = $fakezval.$i;
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}
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var_dump($data);
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function ptr2str($ptr)
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{
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$out = '';
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for ($i = 0; $i < 8; $i++) {
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$out .= chr($ptr & 0xff);
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$ptr >>= 8;
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}
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return $out;
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}
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?>
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--EXPECTF--
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array(2) {
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[0]=>
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object(obj2)#%d (1) {
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["ryat"]=>
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int(1)
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}
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[1]=>
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array(1) {
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[0]=>
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array(1) {
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[0]=>
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object(obj2)#%d (1) {
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["ryat"]=>
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int(1)
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}
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}
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}
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}
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