Class: Yawast::Scanner::SslLabs

Inherits:
Object
  • Object
show all
Defined in:
lib/scanner/ssl_labs.rb

Class Method Summary collapse

Class Method Details

.cipher_suite_secure?(suite) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/scanner/ssl_labs.rb', line 472

def self.cipher_suite_secure?(suite)
  secure = suite.secure?
  # check for weak DH
  if suite.dh_strength != nil && suite.dh_strength < 2048
    secure = false
  end
  # check for RC4
  if suite.name.include? 'RC4'
    secure = false
  end
  # check for weak suites
  if suite.cipher_strength < 112
    secure = false
  end

  secure
end

.get_cert_info(ep) ⇒ Object 



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# File 'lib/scanner/ssl_labs.rb', line 63

def self.get_cert_info (ep)
  # get the ChainCert info for the server cert - needed for extra details
  cert = nil
  ossl_cert = nil
  ep.details.chain.certs.each do |c|
    if c.subject == ep.details.cert.subject
      cert = c
      ossl_cert = OpenSSL::X509::Certificate.new cert.raw
    end
  end

  puts "\tCertificate Information:"
  unless ep.details.cert.valid?
    Yawast::Utilities.puts_vuln "\t\tCertificate Has Issues - Not Valid"

    if ep.details.cert.issues & 1 != 0
      Yawast::Utilities.puts_vuln "\t\tCertificate Issue: no chain of trust"
    end

    if ep.details.cert.issues & (1<<1) != 0
      Yawast::Utilities.puts_vuln "\t\tCertificate Issue: certificate not yet valid"
    end

    if ep.details.cert.issues & (1<<2) != 0
      Yawast::Utilities.puts_vuln "\t\tCertificate Issue: certificate expired"
    end

    if ep.details.cert.issues & (1<<3) != 0
      Yawast::Utilities.puts_vuln "\t\tCertificate Issue: hostname mismatch"
    end

    if ep.details.cert.issues & (1<<4) != 0
      Yawast::Utilities.puts_vuln "\t\tCertificate Issue: revoked"
    end

    if ep.details.cert.issues & (1<<5) != 0
      Yawast::Utilities.puts_vuln "\t\tCertificate Issue: bad common name"
    end

    if ep.details.cert.issues & (1<<6) != 0
      Yawast::Utilities.puts_vuln "\t\tCertificate Issue: self-signed"
    end

    if ep.details.cert.issues & (1<<7) != 0
      Yawast::Utilities.puts_vuln "\t\tCertificate Issue: blacklisted"
    end

    if ep.details.cert.issues & (1<<8) != 0
      Yawast::Utilities.puts_vuln "\t\tCertificate Issue: insecure signature"
    end
  end

  Yawast::Utilities.puts_info "\t\tSubject: #{ep.details.cert.subject}"
  Yawast::Utilities.puts_info "\t\tCommon Names: #{ep.details.cert.common_names}"

  Yawast::Utilities.puts_info "\t\tAlternative names:"
  ep.details.cert.alt_names.each do |name|
    Yawast::Utilities.puts_info "\t\t\t#{name}"
  end

  # here we divide the time by 1000 to strip the fractions of a second off.
  Yawast::Utilities.puts_info "\t\tNot Before: #{Time.at(ep.details.cert.not_before / 1000).utc.to_datetime}"
  Yawast::Utilities.puts_info "\t\tNot After: #{Time.at(ep.details.cert.not_after / 1000).utc.to_datetime}"

  if cert.key_alg == 'EC'
    Yawast::Utilities.puts_info "\t\tKey: #{cert.key_alg} #{cert.key_size} (RSA equivalent: #{cert.key_strength})"
  else
    if cert.key_size < 2048
      Yawast::Utilities.puts_vuln "\t\tKey: #{cert.key_alg} #{cert.key_size}"
    else
      Yawast::Utilities.puts_info "\t\tKey: #{cert.key_alg} #{cert.key_size}"
    end
  end

  Yawast::Utilities.puts_info "\t\tPublic Key Hash: #{Digest::SHA1.hexdigest(ossl_cert.public_key.to_s)}"

  Yawast::Utilities.puts_info "\t\tVersion: #{ossl_cert.version}"

  Yawast::Utilities.puts_info "\t\tSerial: #{ossl_cert.serial}"

  Yawast::Utilities.puts_info "\t\tIssuer: #{ep.details.cert.issuer_label}"

  if ep.details.cert.sig_alg.include?('SHA1') || ep.details.cert.sig_alg.include?('MD5')
    Yawast::Utilities.puts_vuln "\t\tSignature algorithm: #{ep.details.cert.sig_alg}"
  else
    Yawast::Utilities.puts_info "\t\tSignature algorithm: #{ep.details.cert.sig_alg}"
  end

  #todo - figure out what the options for this value are
  if ep.details.cert.validation_type == 'E'
    Yawast::Utilities.puts_info "\t\tExtended Validation: Yes"
  elsif ep.details.cert.validation_type == 'D'
    Yawast::Utilities.puts_info "\t\tExtended Validation: No (Domain Control)"
  else
    Yawast::Utilities.puts_info "\t\tExtended Validation: No"
  end

  if ep.details.cert.sct?
    # check the first bit, SCT in cert
    if ep.details.has_sct & 1 != 0
      Yawast::Utilities.puts_info "\t\tCertificate Transparency: SCT in certificate"
    end

    # check second bit, SCT in stapled OSCP response
    if ep.details.has_sct & (1<<1) != 0
      Yawast::Utilities.puts_info "\t\tCertificate Transparency: SCT in the stapled OCSP response"
    end

    # check third bit, SCT in the TLS extension
    if ep.details.has_sct & (1<<2) != 0
      Yawast::Utilities.puts_info "\t\tCertificate Transparency: SCT in the TLS extension (ServerHello)"
    end
  else
    Yawast::Utilities.puts_info "\t\tCertificate Transparency: No"
  end

  case ep.details.cert.must_staple
    when 0
      Yawast::Utilities.puts_info "\t\tOCSP Must Staple: No"
    when 1
      Yawast::Utilities.puts_warn "\t\tOCSP Must Staple: Supported, but OCSP response is not stapled"
    when 2
      Yawast::Utilities.puts_info "\t\tOCSP Must Staple: OCSP response is stapled"
    else
      Yawast::Utilities.puts_error "\t\tOCSP Must Staple: Unknown Response #{ep.details.cert.must_staple}"
  end

  if ep.details.cert.revocation_info & 1 != 0
    Yawast::Utilities.puts_info "\t\tRevocation information: CRL information available"
  end
  if ep.details.cert.revocation_info & (1<<1) != 0
    Yawast::Utilities.puts_info "\t\tRevocation information: OCSP information available"
  end

  case ep.details.cert.revocation_status
    when 0
      Yawast::Utilities.puts_info "\t\tRevocation status: not checked"
    when 1
      Yawast::Utilities.puts_vuln "\t\tRevocation status: certificate revoked"
    when 2
      Yawast::Utilities.puts_info "\t\tRevocation status: certificate not revoked"
    when 3
      Yawast::Utilities.puts_error "\t\tRevocation status: revocation check error"
    when 4
      Yawast::Utilities.puts_info "\t\tRevocation status: no revocation information"
    when 5
      Yawast::Utilities.puts_error "\t\tRevocation status: SSL Labs internal error"
    else
      Yawast::Utilities.puts_error "\t\tRevocation status: Unknown response #{ep.details.cert.revocation_status}"
  end

  Yawast::Utilities.puts_info "\t\tExtensions:"
  ossl_cert.extensions.each { |ext| Yawast::Utilities.puts_info "\t\t\t#{ext}" unless ext.oid == 'subjectAltName' }

  hash = Digest::SHA1.hexdigest(ossl_cert.to_der)
  Yawast::Utilities.puts_info "\t\tHash: #{hash}"
  puts "\t\t\thttps://censys.io/certificates?q=#{hash}"
  puts "\t\t\thttps://crt.sh/?q=#{hash}"

  puts
end

.get_config_info(ep) ⇒ Object 



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# File 'lib/scanner/ssl_labs.rb', line 225

def self.get_config_info(ep)
  puts "\tConfiguration Information:"

  puts "\t\tProtocol Support:"
  ep.details.protocols.each do |proto|
    if proto.name == 'SSL'
      Yawast::Utilities.puts_vuln "\t\t\t#{proto.name} #{proto.version}"
    else
      Yawast::Utilities.puts_info "\t\t\t#{proto.name} #{proto.version}"
    end
  end
  puts

  puts "\t\tCipher Suite Support:"
  if ep.details.suites.list != nil
    ep.details.suites.list.each do |suite|
      ke = nil
      if suite.ecdh_bits != nil || suite.dh_strength != nil
        if suite.name.include? 'ECDHE'
          ke = "ECDHE-#{suite.ecdh_bits}-bits"
        elsif suite.name.include? 'ECDH'
          ke = "ECDH-#{suite.ecdh_bits}"
        elsif suite.name.include? 'DHE'
          ke = "DHE-#{suite.dh_strength}-bits"
        elsif suite.name.include? 'DH'
          ke = "DH-#{suite.dh_strength}-bits"
        end
      end

      strength = suite.cipher_strength
      if suite.name.include? '3DES'
        # in this case, the effective strength is only 112 bits,
        #  which is what we want to report. So override SSL Labs
        strength = 112
      end

      suite_info = nil
      if ke != nil
        suite_info = "#{suite.name.ljust(50)} - #{strength}-bits - #{ke}"
      else
        suite_info = "#{suite.name.ljust(50)} - #{strength}-bits"
      end

      if cipher_suite_secure? suite
        if strength >= 128
          Yawast::Utilities.puts_info "\t\t\t#{suite_info}"
        else
          Yawast::Utilities.puts_warn "\t\t\t#{suite_info}"
        end
      else
        Yawast::Utilities.puts_vuln "\t\t\t#{suite_info}"
      end
    end
  else
    Yawast::Utilities.puts_error "\t\t\tInformation Not Available"
  end

  puts

  puts "\t\tHandshake Simulation:"
  if ep.details.sims.results != nil
    ep.details.sims.results.each do |sim|
      name = "#{sim.client.name} #{sim.client.version}"
      if sim.client.platform != nil
        name += " / #{sim.client.platform}"
      end
      name = name.ljust(28)

      if sim.success?
        protocol = nil
        ep.details.protocols.each do |proto|
          if sim.protocol_id == proto.id
            protocol = "#{proto.name} #{proto.version}"
          end
        end

        suite_name = nil
        secure = true
        ep.details.suites.list.each do |suite|
          if sim.suite_id == suite.id
            suite_name = suite.name
            secure = cipher_suite_secure? suite
          end
        end

        if secure
          Yawast::Utilities.puts_info "\t\t\t#{name} - #{protocol} - #{suite_name}"
        else
          Yawast::Utilities.puts_vuln "\t\t\t#{name} - #{protocol} - #{suite_name}"
        end
      else
        Yawast::Utilities.puts_error "\t\t\t#{name} - Simulation Failed"
      end
    end
  else
    Yawast::Utilities.puts_error "\t\t\tInformation Not Available"
  end

  puts
end

.get_proto_info(ep) ⇒ Object 



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# File 'lib/scanner/ssl_labs.rb', line 326

def self.get_proto_info(ep)
  puts "\t\tProtocol & Vulnerability Information:"

  if ep.details.drown_vulnerable?
    Yawast::Utilities.puts_vuln "\t\t\tDROWN: Vulnerable"

    ep.details.drown_hosts.each do |dh|
      Yawast::Utilities.puts_vuln "\t\t\t\t#{dh['ip']}:#{dh['port']} - #{dh['status']}"
      puts "\t\t\t\thttps://test.drownattack.com/?site=#{dh['ip']}"
    end
  else
    Yawast::Utilities.puts_info "\t\t\tDROWN: No"
  end

  if ep.details.reneg_support & 1 != 0
    Yawast::Utilities.puts_vuln "\t\t\tSecure Renegotiation: insecure client-initiated renegotiation supported"
  end
  if ep.details.reneg_support & (1<<1) != 0
    Yawast::Utilities.puts_info "\t\t\tSecure Renegotiation: secure renegotiation supported"
  end
  if ep.details.reneg_support & (1<<2) != 0
    Yawast::Utilities.puts_info "\t\t\tSecure Renegotiation: secure client-initiated renegotiation supported"
  end
  if ep.details.reneg_support & (1<<3) != 0
    Yawast::Utilities.puts_info "\t\t\tSecure Renegotiation: server requires secure renegotiation support"
  end

  if ep.details.poodle?
    Yawast::Utilities.puts_vuln "\t\t\tPOODLE (SSL): Vulnerable"
  else
    Yawast::Utilities.puts_info "\t\t\tPOODLE (SSL): No"
  end

  case ep.details.poodle_tls
    when -3
      Yawast::Utilities.puts_info "\t\t\tPOODLE (TLS): Inconclusive (Timeout)"
    when -2
      Yawast::Utilities.puts_info "\t\t\tPOODLE (TLS): TLS Not Supported"
    when -1
      Yawast::Utilities.puts_error "\t\t\tPOODLE (TLS): Test Failed"
    when 0
      Yawast::Utilities.puts_error "\t\t\tPOODLE (TLS): Test Failed (Unknown)"
    when 1
      Yawast::Utilities.puts_info "\t\t\tPOODLE (TLS): No"
    when 2
      Yawast::Utilities.puts_vuln "\t\t\tPOODLE (TLS): Vulnerable"
    else
      Yawast::Utilities.puts_error "\t\t\tPOODLE (TLS): Unknown Response #{ep.details.poodle_tls}"
  end

  if ep.details.fallback_scsv?
    Yawast::Utilities.puts_info "\t\t\tDowngrade Prevention: Yes"
  else
    Yawast::Utilities.puts_warn "\t\t\tDowngrade Prevention: No"
  end

  if ep.details.compression_methods & 1 != 0
    Yawast::Utilities.puts_warn "\t\t\tCompression: DEFLATE"
  else
    Yawast::Utilities.puts_info "\t\t\tCompression: No"
  end

  if ep.details.heartbleed?
    Yawast::Utilities.puts_vuln "\t\t\tHeartbleed: Vulnerable"
  else
    Yawast::Utilities.puts_info "\t\t\tHeartbleed: No"
  end

  case ep.details.open_ssl_ccs
    when -1
      Yawast::Utilities.puts_error "\t\t\tOpenSSL CCS (CVE-2014-0224): Test Failed"
    when 0
      Yawast::Utilities.puts_error "\t\t\tOpenSSL CCS (CVE-2014-0224): Test Failed (Unknown)"
    when 1
      Yawast::Utilities.puts_info "\t\t\tOpenSSL CCS (CVE-2014-0224): No"
    when 2
      Yawast::Utilities.puts_vuln "\t\t\tOpenSSL CCS (CVE-2014-0224): Vulnerable - Not Exploitable"
    when 3
      Yawast::Utilities.puts_vuln "\t\t\tOpenSSL CCS (CVE-2014-0224): Vulnerable"
    else
      Yawast::Utilities.puts_error "\t\t\tOpenSSL CCS (CVE-2014-0224): Unknown Response #{ep.details.open_ssl_ccs}"
  end

  case ep.details.open_ssl_lucky_minus20
    when -1
      Yawast::Utilities.puts_error "\t\t\tOpenSSL Padding Oracle (CVE-2016-2107): Test Failed"
    when 0
      Yawast::Utilities.puts_error "\t\t\tOpenSSL Padding Oracle (CVE-2016-2107): Test Failed (Unknown)"
    when 1
      Yawast::Utilities.puts_info "\t\t\tOpenSSL Padding Oracle (CVE-2016-2107): No"
    when 2
      Yawast::Utilities.puts_vuln "\t\t\tOpenSSL Padding Oracle (CVE-2016-2107): Vulnerable"
    else
      Yawast::Utilities.puts_error "\t\t\tOpenSSL Padding Oracle (CVE-2016-2107): Unknown Response #{ep.details.open_ssl_lucky_minus20}"
  end

  if ep.details.forward_secrecy & (1<<2) != 0
    Yawast::Utilities.puts_info "\t\t\tForward Secrecy: Yes (all simulated clients)"
  elsif ep.details.forward_secrecy & (1<<1) != 0
    Yawast::Utilities.puts_info "\t\t\tForward Secrecy: Yes (modern clients)"
  elsif ep.details.forward_secrecy & 1 != 0
    Yawast::Utilities.puts_warn "\t\t\tForward Secrecy: Yes (limited support)"
  else
    Yawast::Utilities.puts_vuln "\t\t\tForward Secrecy: No"
  end

  if ep.details.ocsp_stapling?
    Yawast::Utilities.puts_info "\t\t\tOCSP Stapling: Yes"
  else
    Yawast::Utilities.puts_warn "\t\t\tOCSP Stapling: No"
  end

  if ep.details.freak?
    Yawast::Utilities.puts_vuln "\t\t\tFREAK: Vulnerable"
  else
    Yawast::Utilities.puts_info "\t\t\tFREAK: No"
  end

  if ep.details.logjam?
    Yawast::Utilities.puts_vuln "\t\t\tLogjam: Vulnerable"
  else
    Yawast::Utilities.puts_info "\t\t\tLogjam: No"
  end

  case ep.details.dh_uses_known_primes
    when 0
      Yawast::Utilities.puts_info "\t\t\tUses common DH primes: No"
    when 1
      Yawast::Utilities.puts_warn "\t\t\tUses common DH primes: Yes (not weak)"
    when 2
      Yawast::Utilities.puts_vuln "\t\t\tUses common DH primes: Yes (weak)"
    else
      unless ep.details.dh_uses_known_primes == nil
        Yawast::Utilities.puts_error "\t\t\tUses common DH primes: Unknown Response #{ep.details.dh_uses_known_primes}"
      end
  end

  if ep.details.dh_ys_reuse?
    Yawast::Utilities.puts_vuln "\t\t\tDH public server param (Ys) reuse: Yes"
  else
    Yawast::Utilities.puts_info "\t\t\tDH public server param (Ys) reuse: No"
  end

  puts
end

.info(uri, sslsessioncount) ⇒ Object 



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# File 'lib/scanner/ssl_labs.rb', line 9

def self.info(uri, sslsessioncount)
  puts 'Beginning SSL Labs scan (this could take a minute or two)'

  api = Ssllabs::Api.new

  info = api.info

  info.messages.each do |msg|
    puts "[SSL Labs]\t#{msg}"
  end

  begin
    api.analyse(host: uri.host, publish: 'off', startNew: 'on', all: 'done', ignoreMismatch: 'on')

    status = ''
    host = nil
    until status == 'READY' || status == 'ERROR' || status == 'DNS'
      # poll for updates every 5 seconds
      # don't want to poll faster, to avoid excess load / errors
      sleep(5)

      host = api.analyse(host: uri.host, publish: 'off', all: 'done', ignoreMismatch: 'on')
      status = host.status

      print '.'
    end
    puts
    puts

    host.endpoints.each do |ep|
      Yawast::Utilities.puts_info "IP: #{ep.ip_address} - Grade: #{ep.grade}"
      puts

      begin
        if ep.status_message == 'Ready'
          get_cert_info(ep)
          get_config_info(ep)
          get_proto_info(ep)
        else
          Yawast::Utilities.puts_error "Error getting information for IP: #{ep.ip_address}: #{ep.status_message}"
        end
      rescue => e
        Yawast::Utilities.puts_error "Error getting information for IP: #{ep.ip_address}: #{e.message}"
      end

      Yawast::Scanner::Ssl.get_session_msg_count(uri) if sslsessioncount

      puts
    end
  rescue => e
    Yawast::Utilities.puts_error "SSL Labs Error: #{e.message}"
  end
end