From 349725b1759b110256b54b45080b6986b471080a Mon Sep 17 00:00:00 2001
From: Michael Koziarski <michael@koziarski.com>
Date: Wed, 8 Dec 2010 13:46:37 +1300
Subject: [PATCH 1/2] Be sure to javascript_escape the email address to prevent apostrophes inadvertently causing javascript errors.

This fixes CVE-2011-0446
---
 actionpack/lib/action_view/helpers/url_helper.rb |    3 ++-
 actionpack/test/template/url_helper_test.rb      |    8 ++++----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/actionpack/lib/action_view/helpers/url_helper.rb b/actionpack/lib/action_view/helpers/url_helper.rb
index 74cb448..8654adb 100644
--- a/actionpack/lib/action_view/helpers/url_helper.rb
+++ b/actionpack/lib/action_view/helpers/url_helper.rb
@@ -471,7 +471,8 @@ module ActionView
         email_address_obfuscated.gsub!(/\./, html_options.delete("replace_dot")) if html_options.has_key?("replace_dot")
 
         if encode == "javascript"
-          "document.write('#{content_tag("a", name || email_address_obfuscated.html_safe, html_options.merge({ "href" => "mailto:"+email_address+extras }))}');".each_byte do |c|
+          html = content_tag("a", name || email_address_obfuscated.html_safe, html_options.merge({ "href" => "mailto:"+html_escape(email_address)+extras }))
+          "document.write('#{escape_javascript(html)}');".each_byte do |c|
             string << sprintf("%%%x", c)
           end
           "<script type=\"#{Mime::JS}\">eval(decodeURIComponent('#{string}'))</script>"
diff --git a/actionpack/test/template/url_helper_test.rb b/actionpack/test/template/url_helper_test.rb
index 9d541fc..480624f 100644
--- a/actionpack/test/template/url_helper_test.rb
+++ b/actionpack/test/template/url_helper_test.rb
@@ -333,11 +333,11 @@ class UrlHelperTest < ActionView::TestCase
   end
 
   def test_mail_to_with_javascript
-    assert_dom_equal "<script type=\"text/javascript\">eval(decodeURIComponent('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%22%6d%61%69%6c%74%6f%3a%6d%65%40%64%6f%6d%61%69%6e%2e%63%6f%6d%22%3e%4d%79%20%65%6d%61%69%6c%3c%2f%61%3e%27%29%3b'))</script>", mail_to("me@domain.com", "My email", :encode => "javascript")
+    assert_dom_equal "<script type=\"text/javascript\">eval(decodeURIComponent('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%5c%22%6d%61%69%6c%74%6f%3a%6d%65%40%64%6f%6d%61%69%6e%2e%63%6f%6d%5c%22%3e%4d%79%20%65%6d%61%69%6c%3c%5c%2f%61%3e%27%29%3b'))</script>", mail_to("me@domain.com", "My email", :encode => "javascript")
   end
 
   def test_mail_to_with_javascript_unicode
-    assert_dom_equal "<script type=\"text/javascript\">eval(decodeURIComponent('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%22%6d%61%69%6c%74%6f%3a%75%6e%69%63%6f%64%65%40%65%78%61%6d%70%6c%65%2e%63%6f%6d%22%3e%c3%ba%6e%69%63%6f%64%65%3c%2f%61%3e%27%29%3b'))</script>", mail_to("unicode@example.com", "únicode", :encode => "javascript")
+    assert_dom_equal "<script type=\"text/javascript\">eval(decodeURIComponent('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%5c%22%6d%61%69%6c%74%6f%3a%75%6e%69%63%6f%64%65%40%65%78%61%6d%70%6c%65%2e%63%6f%6d%5c%22%3e%c3%ba%6e%69%63%6f%64%65%3c%5c%2f%61%3e%27%29%3b'))</script>", mail_to("unicode@example.com", "únicode", :encode => "javascript")
   end
 
   def test_mail_with_options
@@ -361,8 +361,8 @@ class UrlHelperTest < ActionView::TestCase
     assert_dom_equal "<a href=\"&#109;&#97;&#105;&#108;&#116;&#111;&#58;%6d%65@%64%6f%6d%61%69%6e.%63%6f%6d\">&#109;&#101;&#40;&#97;&#116;&#41;&#100;&#111;&#109;&#97;&#105;&#110;&#46;&#99;&#111;&#109;</a>", mail_to("me@domain.com", nil, :encode => "hex", :replace_at => "(at)")
     assert_dom_equal "<a href=\"&#109;&#97;&#105;&#108;&#116;&#111;&#58;%6d%65@%64%6f%6d%61%69%6e.%63%6f%6d\">My email</a>", mail_to("me@domain.com", "My email", :encode => "hex", :replace_at => "(at)")
     assert_dom_equal "<a href=\"&#109;&#97;&#105;&#108;&#116;&#111;&#58;%6d%65@%64%6f%6d%61%69%6e.%63%6f%6d\">&#109;&#101;&#40;&#97;&#116;&#41;&#100;&#111;&#109;&#97;&#105;&#110;&#40;&#100;&#111;&#116;&#41;&#99;&#111;&#109;</a>", mail_to("me@domain.com", nil, :encode => "hex", :replace_at => "(at)", :replace_dot => "(dot)")
-    assert_dom_equal "<script type=\"text/javascript\">eval(decodeURIComponent('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%22%6d%61%69%6c%74%6f%3a%6d%65%40%64%6f%6d%61%69%6e%2e%63%6f%6d%22%3e%4d%79%20%65%6d%61%69%6c%3c%2f%61%3e%27%29%3b'))</script>", mail_to("me@domain.com", "My email", :encode => "javascript", :replace_at => "(at)", :replace_dot => "(dot)")
-    assert_dom_equal "<script type=\"text/javascript\">eval(decodeURIComponent('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%22%6d%61%69%6c%74%6f%3a%6d%65%40%64%6f%6d%61%69%6e%2e%63%6f%6d%22%3e%6d%65%28%61%74%29%64%6f%6d%61%69%6e%28%64%6f%74%29%63%6f%6d%3c%2f%61%3e%27%29%3b'))</script>", mail_to("me@domain.com", nil, :encode => "javascript", :replace_at => "(at)", :replace_dot => "(dot)")
+    assert_dom_equal "<script type=\"text/javascript\">eval(decodeURIComponent('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%5c%22%6d%61%69%6c%74%6f%3a%6d%65%40%64%6f%6d%61%69%6e%2e%63%6f%6d%5c%22%3e%4d%79%20%65%6d%61%69%6c%3c%5c%2f%61%3e%27%29%3b'))</script>", mail_to("me@domain.com", "My email", :encode => "javascript", :replace_at => "(at)", :replace_dot => "(dot)")
+    assert_dom_equal "<script type=\"text/javascript\">eval(decodeURIComponent('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%5c%22%6d%61%69%6c%74%6f%3a%6d%65%40%64%6f%6d%61%69%6e%2e%63%6f%6d%5c%22%3e%6d%65%28%61%74%29%64%6f%6d%61%69%6e%28%64%6f%74%29%63%6f%6d%3c%5c%2f%61%3e%27%29%3b'))</script>", mail_to("me@domain.com", nil, :encode => "javascript", :replace_at => "(at)", :replace_dot => "(dot)")
   end
   
   def protect_against_forgery?
-- 
1.7.2