Advisory Details

July 24th, 2019

Apple macOS AMDRadeonX4000_AMDAccelResource initialize Out-Of-Bounds Read Privilege Escalation Vulnerability

CVE ID	CVE-2019-8692
CVSS SCORE	4.7, AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
AFFECTED VENDORS	Apple
AFFECTED PRODUCTS	macOS
VULNERABILITY DETAILS	This vulnerability allows local attackers to disclose sensitive information 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 initialize method of the AMDRadeonX4000_AMDAccelSharedUserClient class. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges to the level 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/HT210348
DISCLOSURE TIMELINE	2019-04-03 - Vulnerability reported to vendor 2019-07-24 - Coordinated public release of advisory
CREDIT	Lilang Wu and Moony Li of TrendMicro Mobile Security Research Team

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