Advisory Details

April 1st, 2022

Trend Micro Antivirus for Mac Link Following Privilege Escalation Vulnerability

ZDI-22-546
ZDI-CAN-14816

CVE ID CVE-2022-27883
CVSS SCORE 7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS Trend Micro
AFFECTED PRODUCTS Antivirus for Mac
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of Trend Micro Antivirus for Mac. 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 libTmUtil dylib. By creating a symbolic link, an attacker can abuse the product to loosen permissions on a local file. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of root.

ADDITIONAL DETAILS Trend Micro has issued an update to correct this vulnerability. More details can be found at:
https://helpcenter.trendmicro.com/en-us/article/tmka-10978
DISCLOSURE TIMELINE
  • 2021-10-15 - Vulnerability reported to vendor
  • 2022-04-01 - Coordinated public release of advisory
CREDIT Cees Elzinga
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