Advisory Details

November 26th, 2019

Apple macOS UIFoundation Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-19-995
ZDI-CAN-8585

CVE ID CVE-2019-8831
CVSS SCORE 3.3, AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
AFFECTED VENDORS Apple
AFFECTED PRODUCTS macOS
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information 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 UIFoundation module. 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 in conjunction with other vulnerabilities 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/HT210604
DISCLOSURE TIMELINE
  • 2019-07-16 - Vulnerability reported to vendor
  • 2019-11-26 - Coordinated public release of advisory
CREDIT riusksk of VulWar Corp
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