From ${URL} : Possible Input Validation Circumvention in Active Model There is a possible input validation circumvention vulnerability in Active Model. This vulnerability has been assigned the CVE identifier CVE-2016-0753. Versions Affected: 4.1.0 and newer Not affected: 4.0.13 and older Fixed Versions: 5.0.0.beta1.1, 4.2.5.1, 4.1.14.1 Impact ------ Code that uses Active Model based models (including Active Record models) and does not validate user input before passing it to the model can be subject to an attack where specially crafted input will cause the model to skip validations. Vulnerable code will look something like this: ```ruby SomeModel.new(unverified_user_input) ``` Rails users using Strong Parameters are generally not impacted by this issue as they are encouraged to whitelist parameters and must specifically opt-out of input verification using the `permit!` method to allow mass assignment. For example, a vulnerable Rails application will have code that looks like this: ```ruby def create params.permit! # allow all parameters @user = User.new params[:users] end ``` Active Model and Active Record objects are not equipped to handle arbitrary user input. It is up to the application to verify input before passing it to Active Model models. Rails users already have Strong Parameters in place to handle white listing, but applications using Active Model and Active Record outside of a Rails environment may be impacted. @maintainer(s): since the fixed version is already in the tree, please remove the affected versions.
Vulnerable versions of Rails 4.1 and 4.2 have been removed.
Cleanup complete per previous comments.
