Advisory Details

May 18th, 2017

(Pwn2Own) Apple macOS smbfs Out-Of-Bounds Access Privilege Escalation Vulnerability

CVE ID	CVE-2017-2546
CVSS SCORE	7.2, AV:L/AC:L/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	Apple
AFFECTED PRODUCTS	macOS
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 smbfs. 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 buffer. An attacker can leverage this vulnerability 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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