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Versions: 45
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Contents
require 'brakeman/checks/base_check'
class Brakeman::CheckXMLDoS < Brakeman::BaseCheck
Brakeman::Checks.add self
@description = "Checks for XML denial of service (CVE-2015-3227)"
def run_check
version = rails_version
fix_version = case
when version_between?("2.0.0", "3.2.21")
"3.2.22"
when version_between?("4.1.0", "4.1.10")
"4.1.11"
when version_between?("4.2.0", "4.2.1")
"4.2.2"
when version_between?("4.0.0", "4.0.99")
"4.2.2"
when (version.nil? and tracker.options[:rails3])
version = "3.x"
"3.2.22"
when (version.nil? and tracker.options[:rails4])
version = "4.x"
"4.2.2"
else
return
end
return if has_workaround?
message = "Rails #{version} is vulnerable to denial of service via XML parsing (CVE-2015-3227). Upgrade to Rails version #{fix_version}"
warn :warning_type => "Denial of Service",
:warning_code => :CVE_2015_3227,
:message => message,
:confidence => CONFIDENCE[:med],
:gem_info => gemfile_or_environment,
:link_path => "https://groups.google.com/d/msg/rubyonrails-security/bahr2JLnxvk/x4EocXnHPp8J"
end
def has_workaround?
tracker.check_initializers(:"ActiveSupport::XmlMini", :backend=).any? do |match|
arg = match.call.first_arg
if string? arg
value = arg.value
value == 'Nokogiri' or value == 'LibXML'
end
end
end
end
Version data entries
45 entries across 45 versions & 3 rubygems