Apple macOS process_token_GenerateMipmaps Time-Of-Check Time-Of-Use Privilege Escalation Vulnerability
December 9th, 2020
Vulnerability Details
This vulnerability allows local attackers to escalate privileges on affected 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 AppleIntelKBLGraphics kext. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the kernel.
Additional Details
This issue was addressed in macOS Big Sur 11.0.1 and iOS 14.
Disclosure Timeline
- 2020-07-15 - Vulnerability reported to vendor
- 2020-12-09 - Coordinated public release of advisory
Credit
ABC Research s.r.o.
