Advisory Details

October 30th, 2018

Apple macOS libATSServer Heap-based Buffer Overflow Privilege Escalation Vulnerability

ZDI-18-1327
ZDI-CAN-6360

CVE ID CVE-2018-4411
CVSS SCORE 4.4, AV:L/AC:M/Au:N/C:P/I:P/A:P
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 FODBWriteToAnnex method. The issue lies in the failure to properly validate the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current user.
ADDITIONAL DETAILS Apple has issued an update to correct this vulnerability. More details can be found at:
https://support.apple.com/kb/HT201222
DISCLOSURE TIMELINE
  • 2018-07-12 - Vulnerability reported to vendor
  • 2018-10-30 - Coordinated public release of advisory
  • 2018-10-30 - Advisory Updated
CREDIT lilang wu
moony Li of Trend Micro
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