Security researcher Stefan Esser published the details of a vulnerability in OS X a couple weeks ago that allows an attacker to gain root privileges.
This week, Esser’s findings are back in the spotlight, due to some controversy regarding how this was done. Most people, though, are probably more interested in what the vulnerability is and how it might affect them.
The problem, in essence, is a root privilege escalation bug. Every Unix system, and OS X is no exception, has many hidden users defined by the system, besides the one or more that the average person is aware of (ie, the ones that show up on the OS X login screen).
Read the entire article here: