Apple macOS getsockopt Out-Of-Bounds Access Privilege Escalation Vulnerability
October 17th, 2018
Vulnerability Details
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 handling of the getsockopt system call. The issue results from the lack of validating that user-supplied options are of the appropriate size. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code under the context of the kernel.
Additional Details
This issue was addressed with macOS High Sierra 10.13.6, iOS 11.4.1, tvOS 11.4.1, and watchOS 4.3.2.
Disclosure Timeline
- 2018-05-18 - Vulnerability reported to vendor
- 2018-10-17 - Coordinated public release of advisory
- 2018-10-17 - Advisory Updated
Credit
juwei lin (@panicaII) of Trend Micro
