require 'railroader/checks/base_check' # Check for uses of strip_tags in Rails versions before 3.0.17, 3.1.8, 3.2.8 (including 2.3.x): # https://groups.google.com/d/topic/rubyonrails-security/FgVEtBajcTY/discussion # # Check for uses of strip_tags in Rails versions before 2.3.13 and 3.0.10: # http://groups.google.com/group/rubyonrails-security/browse_thread/thread/2b9130749b74ea12 # # Check for user of strip_tags with rails-html-sanitizer 1.0.2: # https://groups.google.com/d/msg/rubyonrails-security/OU9ugTZcbjc/PjEP46pbFQAJ class Railroader::CheckStripTags < Railroader::BaseCheck Railroader::Checks.add self @description = "Report strip_tags vulnerabilities" def run_check if uses_strip_tags? cve_2011_2931 cve_2012_3465 end cve_2015_7579 end def cve_2011_2931 if version_between?('2.0.0', '2.3.12') or version_between?('3.0.0', '3.0.9') if rails_version =~ /^3/ message = "Versions before 3.0.10 have a vulnerability in strip_tags (CVE-2011-2931)" else message = "Versions before 2.3.13 have a vulnerability in strip_tags (CVE-2011-2931)" end warn :warning_type => "Cross-Site Scripting", :warning_code => :CVE_2011_2931, :message => message, :gem_info => gemfile_or_environment, :confidence => :high, :link_path => "https://groups.google.com/d/topic/rubyonrails-security/K5EwdJt06hI/discussion" end end def cve_2012_3465 case when (version_between?('2.0.0', '2.3.14') and tracker.config.escape_html?) message = "All Rails 2.x versions have a vulnerability in strip_tags (CVE-2012-3465)" when version_between?('3.0.10', '3.0.16') message = "Rails #{rails_version} has a vulnerability in strip_tags (CVE-2012-3465). Upgrade to 3.0.17" when version_between?('3.1.0', '3.1.7') message = "Rails #{rails_version} has a vulnerability in strip_tags (CVE-2012-3465). Upgrade to 3.1.8" when version_between?('3.2.0', '3.2.7') message = "Rails #{rails_version} has a vulnerability in strip_tags (CVE-2012-3465). Upgrade to 3.2.8" else return end warn :warning_type => "Cross-Site Scripting", :warning_code => :CVE_2012_3465, :message => message, :confidence => :high, :gem_info => gemfile_or_environment, :link_path => "https://groups.google.com/d/topic/rubyonrails-security/FgVEtBajcTY/discussion" end def cve_2015_7579 if tracker.config.gem_version(:'rails-html-sanitizer') == '1.0.2' if uses_strip_tags? confidence = :high else confidence = :medium end message = "rails-html-sanitizer 1.0.2 is vulnerable (CVE-2015-7579). Upgrade to 1.0.3" warn :warning_type => "Cross-Site Scripting", :warning_code => :CVE_2015_7579, :message => message, :confidence => confidence, :gem_info => gemfile_or_environment, :link_path => "https://groups.google.com/d/msg/rubyonrails-security/OU9ugTZcbjc/PjEP46pbFQAJ" end end def uses_strip_tags? Railroader.debug "Finding calls to strip_tags()" not tracker.find_call(:target => false, :method => :strip_tags, :nested => true).empty? end end