Advisory Details

May 18th, 2017

(Pwn2Own) Apple macOS HFS Uninitialized Memory Information Disclosure Privilege Escalation Vulnerability

CVE ID	CVE-2017-6990
CVSS SCORE	1.9, AV:L/AC:M/Au:N/C:P/I:N/A:N
AFFECTED VENDORS	Apple
AFFECTED PRODUCTS	macOS
VULNERABILITY DETAILS	This vulnerability allows local attackers to disclose sensitive information 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 HFS. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges in 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/HT207797
DISCLOSURE TIMELINE	2017-03-17 - Vulnerability reported to vendor 2017-05-18 - Coordinated public release of advisory
CREDIT	Chaitin Security Research Lab

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