54 lines
1023 B
PHP
54 lines
1023 B
PHP
--TEST--
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Bug #70436: 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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{
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var $data;
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function serialize()
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{
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return serialize($this->data);
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}
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function unserialize($data)
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{
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$this->data = unserialize($data);
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}
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}
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$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 = 'C:3:"obj":3:{rya}';
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$exploit = 'a:4:{i:0;i:1;i:1;C:3:"obj":'.strlen($inner).':{'.$inner.'}i:2;s:'.strlen($fakezval).':"'.$fakezval.'";i:3;R:5;}';
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$data = unserialize($exploit);
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var_dump($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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DONE
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--EXPECTF--
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Notice: unserialize(): Error at offset 0 of 3 bytes in %sbug70436.php on line %d
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Notice: unserialize(): Error at offset 93 of 94 bytes in %sbug70436.php on line %d
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bool(false)
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DONE
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