The Reminders component in Apple OS X before 10.11.4 allows attackers to bypass an intended user-confirmation requirement and trigger a dialing action via a tel: URL.
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
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Access control involves the use of several protection mechanisms such as:
When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: