Advisory Details

October 8th, 2019

Apple macOS CFFromShiftJISLen Out-Of-Bounds Read Remote Code Execution

ZDI-19-863
ZDI-CAN-8588

CVE ID CVE-2019-8745
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Apple
AFFECTED PRODUCTS macOS
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Apple macOS. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the CFFromShiftJISLen function. Crafted data in a DOC file can trigger a read past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Apple has issued an update to correct this vulnerability. More details can be found at:
https://support.apple.com/en-us/HT210634
DISCLOSURE TIMELINE
  • 2019-05-31 - Vulnerability reported to vendor
  • 2019-10-08 - Coordinated public release of advisory
CREDIT riusksk of VulWar Corp
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