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Clean tag attributes before passing through the escape_once logic.

Addresses CVE-2009-3009
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1 parent e3db21f commit 9af2823b32e001358babde7644e5cc1c0ec29d6e @NZKoz NZKoz committed Aug 31, 2009
Showing with 1 addition and 1 deletion.
  1. +1 −1 actionpack/lib/action_view/helpers/tag_helper.rb
@@ -101,7 +101,7 @@ def cdata_section(content)
# escape_once("<< Accept & Checkout")
# # => "<< Accept & Checkout"
def escape_once(html)
- html.to_s.gsub(/[\"><]|&(?!([a-zA-Z]+|(#\d+));)/) { |special| ERB::Util::HTML_ESCAPE[special] }
+ ActiveSupport::Multibyte.clean(html.to_s).gsub(/[\"><]|&(?!([a-zA-Z]+|(#\d+));)/) { |special| ERB::Util::HTML_ESCAPE[special] }
end
private

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