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