Module: PWN::Plugins::Sock

Defined in:
lib/pwn/plugins/sock.rb

Overview

This plugin was created to support fuzzing various networking protocols

Constant Summary collapse

@@logger = 
PWN::Plugins::PWNLogger.create

Class Method Summary collapse

Class Method Details

.authors ⇒ Object

Author(s)

0day Inc. <[email protected]>



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# File 'lib/pwn/plugins/sock.rb', line 312

public_class_method def self.authors
  "AUTHOR(S):
    0day Inc. <[email protected]>
  "
end

.check_port_in_use(opts = {}) ⇒ Object

Supported Method Parameters

PWN::Plugins::Sock.check_port_in_use(

port: 'required - target port',
server_ip: 'optional - target host or ip to check (Defaults to 127.0.0.1)',
protocol: 'optional - :tcp || :udp (defaults to tcp)'

)



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# File 'lib/pwn/plugins/sock.rb', line 121

public_class_method def self.check_port_in_use(opts = {})
  server_ip = opts[:server_ip] ||= '127.0.0.1'
  port      = opts[:port]
  protocol  = (opts[:protocol] ||= :tcp).to_s.downcase.to_sym

  ct = 0.5 # connect timeout in seconds

  case protocol
  when :tcp
    # Use &:close intead of block
    Socket.tcp(server_ip, port, connect_timeout: ct, &:close)
    # Port is already in use (or no permission)
    true

  when :udp
    socket = UDPSocket.new
    socket.bind(server_ip, port)
    # Port is NOT in use (or at least we can use it)
    false
  else
    raise "Unsupported protocol: #{protocol}"
  end
rescue Errno::EADDRINUSE, # address already in use
       Errno::EACCES # permission denied

  state = true if protocol == :udp
  state = false if protocol == :tcp

  state
rescue Errno::ECONNREFUSED, # connection refused (usually means port exists but no listener)
       Errno::EHOSTUNREACH, # host unreachable
       Errno::ETIMEDOUT # connection timed out

  # Port is NOT in use (or at least we can use it)
  false
rescue SocketError => e
  # Usually means invalid address / interface
  raise "Socket error while checking port #{port}: #{e.message}"
rescue StandardError => e
  warn "[!] Unexpected error while checking port: #{e.class} – #{e.message}"
  false
ensure
  socket.close if protocol == :udp && !socket.nil?
end

.connect(opts = {}) ⇒ Object

Supported Method Parameters

sock_obj = PWN::Plugins::Sock.connect(

target: 'required - target host or ip',
port: 'required - target port',
protocol: 'optional - :tcp || :udp (defaults to :tcp)',
tls: 'optional - boolean connect to target socket using TLS (defaults to false)'

)



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# File 'lib/pwn/plugins/sock.rb', line 20

public_class_method def self.connect(opts = {})
  target = opts[:target].to_s.scrub
  port = opts[:port].to_i

  protocol = opts[:protocol]
  protocol ||= :tcp

  # TODO: Add proxy support

  tls = true if opts[:tls]
  tls ||= false

  tls_min_version = OpenSSL::SSL::TLS1_VERSION if tls_min_version.nil?

  case protocol.to_s.to_sym
  when :tcp
    if tls
      sock = TCPSocket.open(target, port)
      tls_context = OpenSSL::SSL::SSLContext.new
      tls_context.set_params(verify_mode: OpenSSL::SSL::VERIFY_NONE)
      tls_context.min_version = tls_min_version
      # tls_context.ciphers = tls_context.ciphers.select do |cipher|
      #   cipher[1] == cipher_tls
      # end
      tls_sock = OpenSSL::SSL::SSLSocket.new(sock, tls_context)
      tls_sock.hostname = target
      sock_obj = tls_sock.connect
      sock_obj.sync_close = true
    else
      sock_obj = TCPSocket.open(target, port)
    end
  when :udp
    sock_obj = UDPSocket.new
    sock_obj.connect(target, port)
  else
    raise "Unsupported protocol: #{protocol}"
  end

  sock_obj
rescue OpenSSL::SSL::SSLError => e
  case tls_min_version
  when OpenSSL::SSL::TLS1_VERSION
    puts 'Attempting OpenSSL::SSL::TLS1_1_VERSION...'
    # cipher_tls = 'TLSv1.0'
    tls_min_version = OpenSSL::SSL::TLS1_1_VERSION
  when OpenSSL::SSL::TLS1_1_VERSION
    puts 'Attempting OpenSSL::SSL::TLS1_2_VERSION...'
    # cipher_tls = 'TLSv1.2'
    tls_min_version = OpenSSL::SSL::TLS1_2_VERSION
  when OpenSSL::SSL::TLS1_2_VERSION
    puts 'Attempting OpenSSL::SSL::TLS1_3_VERSION...'
    # cipher_tls = 'TLSv1.3'
    tls_min_version = OpenSSL::SSL::TLS1_3_VERSION
  else
    tls_min_version = :abort
  end

  retry unless tls_min_version == :abort
  raise "\n#{e.inspect}" if tls_min_version == :abort
rescue StandardError => e
  sock_obj = disconnect(sock_obj: sock_obj) unless sock_obj.nil?
  raise e
end

.disconnect(opts = {}) ⇒ Object

Supported Method Parameters

sock_obj = PWN::Plugins::Sock.disconnect(

sock_obj: 'required - sock_obj returned from #connect method'

)



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# File 'lib/pwn/plugins/sock.rb', line 292

public_class_method def self.disconnect(opts = {})
  sock_obj = opts[:sock_obj]
  return unless sock_obj.respond_to?(:close)

  # Shutdown both directions to terminate flows immediately
  # sock_obj.shutdown(Socket::SHUT_RDWR)

  # Set SO_LINGER=0 to force RST (skips TIME_WAIT; ideal for fuzzing)
  # linger = [1, 0].pack('ii')
  # sock_obj.setsockopt(Socket::SOL_SOCKET, Socket::SO_LINGER, linger)

  sock_obj.close
rescue StandardError => e
  raise e
ensure
  sock_obj = nil
end

.get_random_unused_port(opts = {}) ⇒ Object

Supported Method Parameters

PWN::Plugins::Sock.get_random_unused_port(

server_ip: 'optional - target host or ip to check (Defaults to 127.0.0.1)',
protocol: 'optional - :tcp || :udp (defaults to tcp)'

)



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# File 'lib/pwn/plugins/sock.rb', line 90

public_class_method def self.get_random_unused_port(opts = {})
  server_ip = opts[:server_ip]
  server_ip ||= '127.0.0.1'
  port = -1
  protocol = opts[:protocol]
  protocol ||= :tcp

  port_in_use = true
  while port_in_use
    port = Random.rand(1024..65_535)
    port_in_use = check_port_in_use(
      server_ip: server_ip,
      port: port,
      protocol: protocol
    )
  end

  port
rescue Errno::ECONNREFUSED,
       Errno::EHOSTUNREACH,
       Errno::ETIMEDOUT
  false
end

.get_tls_cert(opts = {}) ⇒ Object

Supported Method Parameters

cert_obj = PWN::Plugins::Sock.get_tls_cert(

target: 'required - target host or ip',
port: 'optional - target port (defaults to 443)'

)



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# File 'lib/pwn/plugins/sock.rb', line 269

public_class_method def self.get_tls_cert(opts = {})
  target = opts[:target].to_s.scrub
  port = opts[:port]
  port ||= 443

  tls_sock_obj = connect(
    target: target,
    port: port,
    protocol: :tcp,
    tls: true
  )
  tls_sock_obj.peer_cert
rescue StandardError => e
  raise e
ensure
  tls_sock_obj = disconnect(sock_obj: tls_sock_obj) unless tls_sock_obj.nil?
end

.help ⇒ Object

Display Usage for this Module



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# File 'lib/pwn/plugins/sock.rb', line 320

public_class_method def self.help
  puts "USAGE:
    sock_obj = #{self}.connect(
      target: 'required - target host or ip',
      port: 'required - target port',
      protocol: 'optional - :tcp || :udp (defaults to tcp)',
      tls: 'optional - boolean connect to target socket using TLS (defaults to false)'
    )

    port = #{self}.get_random_unused_port(
      server_ip: 'optional - target host or ip to check (Defaults to 127.0.0.1)',
      protocol: 'optional - :tcp || :udp (defaults to tcp)'
    )

    #{self}.check_port_in_use(
      server_ip: 'optional - target host or ip to check (Defaults to 127.0.0.1)',
      port: 'required - target port',
      protocol: 'optional - :tcp || :udp (defaults to tcp)'
    )

    listen_obj = #{self}.listen(
      port: 'required - target port',
      server_ip: 'optional - target host or ip to listen (Defaults to 127.0.0.1')',
      protocol: 'optional - :tcp || :udp (defaults to tcp)',
      tls: 'optional - boolean listen on TLS-enabled socket (defaults to false)',
      detach: 'optional - boolean to detach listener to background (defaults to false)'
    )

    cert_obj = #{self}.get_tls_cert(
      target: 'required - target host or ip',
      port: 'optional - target port (defaults to 443)'
    )

    sock_obj = #{self}.disconnect(
      sock_obj: 'required - sock_obj returned from #connect method'
    )

    #{self}.authors
  "
end

.listen(opts = {}) ⇒ Object

Supported Method Parameters

listen_obj = PWN::Plugins::Sock.listen(

port: 'required - target port',
server_ip: 'optional - target host or ip to listen (Defaults to 127.0.0.1')',
protocol: 'optional - :tcp || :udp (defaults to tcp)',
tls: 'optional - boolean listen on TLS-enabled socket (defaults to false)',
detach: 'optional - boolean to detach listener to background (defaults to false)'

)



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# File 'lib/pwn/plugins/sock.rb', line 175

public_class_method def self.listen(opts = {})
  port = opts[:port]
  raise 'ERROR: Missing required parameter: port' if port.nil?

  server_ip = opts[:server_ip] ||= '127.0.0.1'
  protocol = (opts[:protocol] ||= :tcp).to_s.downcase.to_sym
  tls = opts[:tls] || false
  detach = opts[:detach] || false

  listen_obj = nil

  case protocol
  when :tcp
    server = TCPServer.open(server_ip, port)

    if tls
      tls_context = OpenSSL::SSL::SSLContext.new
      tls_context.set_params(verify_mode: OpenSSL::SSL::VERIFY_NONE)
      # TODO: min_version, ciphers, etc.
      listen_obj = OpenSSL::SSL::SSLServer.new(server, tls_context)
    else
      listen_obj = server
    end

    unless detach
      # Default blocking mode - simple accept-and-handle loop
      # puts "[*] Listening on #{server_ip}:#{port} (#{tls ? 'TLS' : 'plain'} TCP)..."

      loop do
        client = listen_obj.accept
        Thread.new(client) do |c|
          peer = c.peeraddr
          puts "[+] Connection from #{peer}"

          while (data = c.gets)
            puts "[#{peer}] #{data.strip}"
            # Optional: echo back
            # c.puts "ECHO: #{data}"
          end
        rescue Errno::ECONNRESET, Errno::EPIPE, IOError
          # Client disconnected
        ensure
          client.close unless client.nil?
        end
      end
    end

  when :udp
    listen_obj = UDPSocket.new
    listen_obj.bind(server_ip, port)

    # puts "[*] Listening on #{server_ip}:#{port} (UDP)..."

    unless detach
      # Simple single-threaded UDP receive loop
      loop do
        msg, addrinfo = listen_obj.recvmsg
        next unless msg && !msg.empty?

        peer = "#{addrinfo.ip_address}:#{addrinfo.ip_port}"
        puts "[#{peer}] #{msg.inspect}"
        # Optional: echo back
        # listen_obj.send("ECHO: #{msg}", 0, addrinfo.ip_address, addrinfo.ip_port)
      end
    end

  else
    raise "Unsupported protocol: #{protocol}"
  end

  loop do
    listening = check_port_in_use(
      server_ip: server_ip,
      port: port,
      protocol: protocol
    )
    break if listening
  end

  listen_obj
rescue Interrupt
  puts "\n[!] Caught interrupt, shutting down listener..."
rescue StandardError => e
  raise
ensure
  listen_obj.close unless listen_obj.nil? || detach
end