CVE-2012-3424

The decode_credentials method in
actionpack/lib/action_controller/metal/http_authentication.rb in Ruby on
Rails 3.x before 3.0.16, 3.1.x before 3.1.7, and 3.2.x before 3.2.7
converts Digest Authentication strings to symbols, which allows remote
attackers to cause a denial of service by leveraging access to an
application that uses a with_http_digest helper method, as demonstrated by
the authenticate_or_request_with_http_digest method.
There is a DoS vulnerability in Action Pack digest authentication handling in
Rails.

Notes