Apple OS X IOUSBInterfaceUserClient Out-Of-Bounds Indexing Privilege Escalation Vulnerability
Vulnerability Details
This vulnerability allows local attackers to execute arbitrary code on vulnerable installations of Apple OS X. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the handling of the IOUSBInterfaceUserClient interface. The issue lies in the failure to ensure that a user-supplied index is within the bounds of the allocated buffer. An attacker can leverage this to escalate their privileges and execute code under the context of the kernel.
Additional Details
Apple has issued an update to correct this vulnerability. More details can be found at:
https://support.apple.com/en-us/HT206167
Disclosure Timeline
- 2016-02-04 - Vulnerability reported to vendor
- 2016-03-22 - Coordinated public release of advisory
Credit
Juwei Lin of Trend Micro
