Class: Kekkan::Parsers::Cve2Document

Inherits:
Nokogiri::XML::SAX::Document
  • Object
show all
Defined in:
lib/kekkan/parsers/cve_2_sax_listener.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Cve2Document

Sets up a array of all valid XML fields



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# File 'lib/kekkan/parsers/cve_2_sax_listener.rb', line 34

def initialize
	@vals = Hash.new

	@valid_elements = Array[
		"nvd", "vuln:cve-id", "vuln:published-datetime", "vuln:last-modified-datetime",
		"cvss:score", "cvss:access-vector", "cvss:access-complexity", "cvss:authentication",
		"cvss:confidentiality-impact", "cvss:integrity-impact", "cvss:availability-impact",
		"cvss:source", "cvss:generated-on-datetime", "cvss:base_metrics", "vuln:cvss",
		"vuln:summary", "vuln:reference", " vuln:source", "vuln:references", "vuln:source",
		"entry", "vuln:vulnerable-software-list", "vuln:product", "vuln:cwe",
		"vuln:security-protection", "vuln:assessment_check", "vuln:definition",
		"vuln:scanner"
	]

	@ignored_elements = Array[
		"cpe-lang:logical-test", "vuln:vulnerable-configuration", "cpe-lang:fact-ref"
	]

	@valid_elements = @valid_elements + @ignored_elements

end

Instance Method Details

#characters(text) ⇒ Object

Called when the inner text of a element is reached

Parameters:

  • text 


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# File 'lib/kekkan/parsers/cve_2_sax_listener.rb', line 118

def characters(text)
	if @vals[@tag] == nil then
		@vals[@tag] = text.strip
	else
		@vals[@tag] << text.strip
	end
end

#end_element(element) ⇒ Object

Called when the end of the XML element is reached

Parameters:

  • element 


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# File 'lib/kekkan/parsers/cve_2_sax_listener.rb', line 129

def end_element(element)
	#puts "End element: #{element}"
	@tag = nil
	case element
		when "vuln:cve-id"
			@entry.attributes = { :cve => @vals["vuln:cve-id"] }
			@entry.save

		when "vuln:published-datetime"
			@entry.attributes = { :published_datetime => @vals["vuln:published-datetime"]	}
			@entry.save

		when "vuln:last-modified-datetime"
			@entry.attributes = { :last_modified_datetime => @vals["vuln:last-modified-datetime"]	}
			@entry.save

		when "vuln:summary"
			@entry.attributes = { :summary => @vals["vuln:summary"] }
			@entry.save

		when "vuln:security-protection"
			@entry.attributes = { :security_protection => @vals["vuln:security-protection"]}
			@entry.save

		when "vuln:product"
			@product = @entry.vulnerable_software_lists.create
			@product.attributes = { :product => @vals["vuln:product"] }
			@product.save

		when "vuln:cvss"
			@cvss.attributes = {
				:score => @vals["cvss:score"],
				:access_vector => @vals["cvss:access-vector"],
				:access_complexity  => @vals["cvss:access-complexity"],
				:authenication  => @vals["cvss:authentication"],
				:confidentiality_impact  => @vals["cvss:confidentiality-impact"],
				:integrity_impact  => @vals["cvss:integrity-impact"],
				:availability_impact  => @vals["cvss:availability-impact"],
				:source  => @vals["cvss:source"],
				:generated_on_datetime  => @vals["cvss:generated-on-datetime"]
			}
			@cvss.save

		when "vuln:references"
			@reference.attributes = {
				:source => @vals["vuln:source"],
				:reference => @vals["vuln:reference"]
			}
			@reference.save
	end
end

#start_element(element, attributes = []) ⇒ Object

Callback for when the start of a XML element is reached

Parameters:

  • element —

    XML element

  • attributes (defaults to: []) —

    Attributes for the XML element



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# File 'lib/kekkan/parsers/cve_2_sax_listener.rb', line 60

def start_element(element, attributes = [])
	@tag = element
	@vals[@tag] = ""

	if !@valid_elements.include?(element)
		puts "New XML element detected: #{element}. Please report this to #{Kekkan::EMAIL}"
	end

	case element
		when "entry"
			@entry = Kekkan::Models::Entry.create
			@entry.save

		when "vuln:cvss"
			@cvss = @entry.cvsses.create
			@cvss.save

		when "vuln:cwe"
			@entry.attributes = { :cwe => Hash[attributes]["id"] }
			@entry.save

		when "vuln:references"
			@reference = @entry.references.create
			@reference.attributes = {
				:ref_type => Hash[attributes]["reference_type"]
			}
			@reference.save

		when "vuln:reference"
			@reference.attributes = {
				:href => Hash[attributes]["href"],
				:language => Hash[attributes]["xml:lang"]
			}
			@reference.save

		when "vuln:assessment_check "
			@ass = @entry.assessment_check.create
			@ass.attributes = {
				:name => Hash[attributes]["name"],
				:href => Hash[attributes]["href"],
				:system => Hash[attributes]["system"]
			}
			@entry.save

		when "vuln:definition"
			@scanner = @entry.scanners.create
			@scanner.attributes = {
				:name => Hash[attributes]["name"],
				:href => Hash[attributes]["href"],
				:system => Hash[attributes]["system"]
			}
			@scanner.save
	end
end