Security Bulletin: Trend Micro Antivirus for MAC Improper Access Control Privilege Escalation Vulnerability

Bulletin Date: November 16, 2021

CVE Vulnerability Identifier: CVE-2021-43771

Platform: Macintosh OS

CVSSv3 Score: 7.8: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity Rating: High

Summary

Trend Micro has released updated versions of the Trend Micro Antivirus for MAC 2021 family of consumer products which resolves an Improper Access Control Privilege Escalation vulnerability.

Affected versions

Solution

Trend Micro has released a new build and an update for the affected version via the product’s ActiveUpdate automatic update mechanism and customers should receive the update automatically as long as they are connected to the Internet or can upgrade to the latest product version.

Vulnerability Details

Trend Micro Antivirus for Mac 2021 v11 (Consumer) is vulnerable to an improper access control privilege escalation vulnerability that could allow an attacker to establish a connection that could lead to full local privilege escalation within the application.

Please note that an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

Trend Micro has received no reports nor is aware of any actual attacks against the affected product related to this vulnerability at this time.

Acknowledgement

Trend Micro would like to thank the following individual for responsibly disclosing the issue and working with Trend Micro to help protect our customers:

• Wojciech Regula working with Trend Micro’s Zero Day Initiative

Additional Assistance

Customers who have questions are encouraged to contact Trend Micro Technical Support for further assistance.

Reference

• ZDI-CAN-13882