Class: Intrigue::Ident::Cpe

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

Instance Method Summary collapse

Constructor Details

#initialize(cpe_string) ⇒ Cpe 



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# File 'lib/cpe.rb', line 5

def initialize(cpe_string)
  @cpe = cpe_string
  x = _parse_cpe(@cpe)

  return nil unless x

  @vendor = x[:vendor]
  @product = x[:product]
  @version = x[:version]
  @variant = x[:variant] # TODO... currenty not used
end

Instance Method Details

#<(another) ⇒ Object 



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# File 'lib/cpe.rb', line 17

def <(another)
  Gem::Version(@version) < Gem::Version(_parse_cpe(another[:version]))
end

#>(another) ⇒ Object 



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# File 'lib/cpe.rb', line 21

def >(another)
  Gem::Version(@version) > Gem::Version(_parse_cpe(another[:version]))
end

#vulns ⇒ Object

hacktastic! matches vulns by CPE



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# File 'lib/cpe.rb', line 26

def vulns

  # Set a data directory underneath our folder if we're not in the context of core
  if $intrigue_basedir
    nvd_data_directory = "#{$intrigue_basedir}/data/nvd"
  else
    nvd_data_directory = "#{File.expand_path('data/nvd', File.dirname(__FILE__))}"
  end

  # fail unless we have something to match
  return [] unless @version

  vulns = []
  files = [
      "#{nvd_data_directory}/nvdcve-1.0-2018.json",
      "#{nvd_data_directory}/nvdcve-1.0-2017.json",
      "#{nvd_data_directory}/nvdcve-1.0-2016.json",
      "#{nvd_data_directory}/nvdcve-1.0-2015.json",
      "#{nvd_data_directory}/nvdcve-1.0-2014.json",
      "#{nvd_data_directory}/nvdcve-1.0-2013.json",
      "#{nvd_data_directory}/nvdcve-1.0-2012.json",
      "#{nvd_data_directory}/nvdcve-1.0-2011.json"
    ]

  files.each do |f|
    puts "DEBUG Checking file: #{f}"
    next unless File.exist? f

    json = ::JSON.parse(File.open(f,"r").read)
    json["CVE_Items"].each do |v|

      # Note that the JSON has CVE stuff under a hash, so
      # pull that out separately (probably due to NVD responsibility vs Mitre)
      cve = v["cve"]

      # data sanity check
      unless cve["affects"] && cve["affects"]["vendor"] && cve["affects"]["vendor"]["vendor_data"]
        #puts "DEBUG No Affects data... #{cve["cve"]}"
        next
      end

      # check to make sure it includes our vendor
      vendors = cve["affects"]["vendor"]["vendor_data"].map{|x| x["vendor_name"].downcase }
      unless vendors.uniq.include? @vendor.downcase
        #vd = cve["affects"]["vendor"]["vendor_data"]
        #puts "DEBUG No vendor match: #{@vendor.downcase} in #{vendors.uniq.count} vendors..."
        next
      end

      # iterate through the heirarchy to get to product and version we can match on
      cve["affects"]["vendor"]["vendor_data"].each do |vd|
        #puts "DEBUG Checking Vendor Data #{vd}"
        vd["product"]["product_data"].each do |p|
          #puts "DEBUG Checking product #{p}"
          p["version"]["version_data"].each do |vd|
            next unless p["product_name"].downcase == @product.downcase
            #puts "DEBUG Matching: #{vd["version_value"]} with #{@version}"

            if vd["version_value"] >= @version
              #puts "MATCHED!"

              cve_id = cve["CVE_data_meta"]["ID"]
              #puts "CVE: #{cve_id}"

              # Get the CWE if we have it
              if cve["problemtype"] && cve["problemtype"]["problemtype_data"].first
                cwe_id = cve["problemtype"]["problemtype_data"].first["description"].first["value"]
                #puts "CWE: #{cwe_id}"
              end

              # Get the CVSS data if we have it
              if v["impact"]
                cvss_v2_score = v["impact"]["baseMetricV2"]["cvssV2"]["baseScore"]
                cvss_v2_vector = v["impact"]["baseMetricV2"]["cvssV2"]["vectorString"]
                #puts "CVSS v2: #{cvss_v2}"

                # v3 only goes back to 2016
                if v["impact"]["baseMetricV3"]
                  cvss_v3_score = v["impact"]["baseMetricV3"]["cvssV3"]["baseScore"]
                  cvss_v3_vector = v["impact"]["baseMetricV3"]["cvssV3"]["vectorString"]
                  #puts "CVSS v3: #{cvss_v3}"
                end
              end

              # create a hash with the vuln's data
              vuln = {
                cve_id: cve_id,
                cwe_id: cwe_id,
                cvss_v2: {score: cvss_v2_score, vector: cvss_v2_vector },
                cvss_v3: {score: cvss_v3_score, vector: cvss_v3_vector }
              }

              #puts "DEBUG Vuln: #{vuln}"

              vulns << vuln
            end

          end
        end
      end

    end
  end
  #puts "DEBUG Sending #{vulns.uniq.count} vulns"
vulns.uniq
end