(Pwn2Own) Apple macOS authd Privilege Escalation Vulnerability

2017-05-18T00:00:00
ID ZDI-17-356
Type zdi
Reporter Samuel Gro and Niklas Baumstark
Modified 2017-05-18T00:00:00

Description

This vulnerability allows local attackers to escalate privileges on vulnerable installations of Apple macOS. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the authd service. The issue lies in the lack of proper validation of authorization tokens prior to using them. An attacker can leverage this vulnerability to escalate privileges under the context of root.