require 'benchmark'
require 'rubygems'

valid = Benchmark.measure do
  Gem::Version.new '1.22.333.4444.55555.666666.7777777'
end

puts 'Valid version time:'
puts valid

invalid = Benchmark.measure do
  begin
    Gem::Version.new '1.22.333.4444.55555.666666.7777777.'
  rescue
  end
end

puts 'Invalid version time:'
puts invalid

n = (valid.real - invalid.real).abs

if 0.1 < n then
  puts 'You are vulnerable to CVE-2013-4287.'
else
  puts 'You are NOT vulnerable to CVE-2013-4287.'
end