Class: Intrigue::Ident::Cpe

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

Instance Method Summary collapse

Constructor Details

#initialize(cpe_string) ⇒ Cpe

Returns a new instance of Cpe.



5
6
7
8
9
10
11
12
13
14
15
 
# 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 



17
18
19
 
# File 'lib/cpe.rb', line 17

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

#>(another) ⇒ Object 



21
22
23
 
# 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



26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
 
# 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