Advisory Details

December 3rd, 2020

Apple macOS libnetworkextension ne_filter_protocol_remove_input_handler Use-After-Free Remote Code Execution Vulnerability

ZDI-20-1393
ZDI-CAN-11457

CVE ID CVE-2020-9996
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 handling of network extensions in PDFs. The issue results from the lack of validating the existence of an object prior to performing operations on the object. 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/HT211931
DISCLOSURE TIMELINE
  • 2020-07-02 - Vulnerability reported to vendor
  • 2020-12-03 - Coordinated public release of advisory
CREDIT Zhiwei Yuan of Trend Micro iCore Team, Junzhi Lu and Mickey Jin of Trend Micro Mobile Security Research Team
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