Tags with invalid names should also be stripped in order to prevent

XSS attacks.  Thanks Sascha Depold for the report.

2 files changed, 8 insertions, 1 deletions

diff --git a/actionpack/lib/action_controller/vendor/html-scanner/html/node.rb b/actionpack/lib/action_controller/vendor/html-scanner/html/node.rb
index 22b3243104..4e1f016431 100644
--- a/actionpack/lib/action_controller/vendor/html-scanner/html/node.rb
+++ b/actionpack/lib/action_controller/vendor/html-scanner/html/node.rb
@@ -156,7 +156,7 @@ module HTML #:nodoc:
           end
 
           closing = ( scanner.scan(/\//) ? :close : nil )
-          return Text.new(parent, line, pos, content) unless name = scanner.scan(/[\w:-]+/)
+          return Text.new(parent, line, pos, content) unless name = scanner.scan(/[^\s!>\/]+/)
           name.downcase!
 
           unless closing
diff --git a/actionpack/test/template/html-scanner/sanitizer_test.rb b/actionpack/test/template/html-scanner/sanitizer_test.rb
index 678cb9eeeb..62ad6be680 100644
--- a/actionpack/test/template/html-scanner/sanitizer_test.rb
+++ b/actionpack/test/template/html-scanner/sanitizer_test.rb
@@ -5,6 +5,13 @@ class SanitizerTest < ActionController::TestCase
     @sanitizer = nil # used by assert_sanitizer
   end
 
+  def test_strip_tags_with_quote
+    sanitizer = HTML::FullSanitizer.new
+    string    = '<" <img src="trollface.gif" onload="alert(1)"> hi'
+
+    assert_equal ' hi', sanitizer.sanitize(string)
+  end
+
   def test_strip_tags
     sanitizer = HTML::FullSanitizer.new
     assert_equal("<<<bad html", sanitizer.sanitize("<<<bad html"))