Paranoid Android

Paranoid Android can protect you from this potential vulnerability until Apple makes an official fix available. It does this by watching the URL schemes that are requested and delaying them until you've had a chance to say whether you'd like to proceed or not. If you know that the url that's being loaded is legit, go ahead, but if it looks suspicious, Paranoid Android gives you an opportunity to cancel it.

だそうで、プロトコルヘルパーの変更による対処とは違うようですね。
Application Enhancer が必要みたいです。＜ ネタ元 Paranoid Android Protects and Serve（The Cult of Mac Blog）