Affected Version(s)

Solution

Trend Micro has released the following solutions to address the issue:

These are the minimum recommended version(s) of the patches and/or builds required to address the issue. Trend Micro highly encourages customers to obtain the latest version of the product if there is a newer one available than the one listed in this bulletin.

Customers are encouraged to visit Trend Micro’s Download Center to obtain prerequisite software (such as Service Packs) before applying any of the solutions above.

Vulnerability Details

CVE-2021-32463:  Incorrect Permission Assignment Denial-of-Service Vulnerability 
CVSSv3: 6.1: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
An incorrect permission assignment denial-of-service vulnerability in Trend Micro Apex One and Apex One as a Service (SaaS) could allow a local attacker to escalate privileges and delete files with system privileges on affected installations.

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

Mitigating Factors

Exploiting these type of vulnerabilities generally require that an attacker has access (physical or remote) to a vulnerable machine. In addition to timely application of patches and updated solutions, customers are also advised to review remote access to critical systems and ensure policies and perimeter security is up-to-date.

However, even though an exploit may require several specific conditions to be met, Trend Micro strongly encourages customers to update to the latest builds as soon as possible.

Acknowledgement

Trend Micro would like to thank the following individuals for responsibly disclosing these issues and working with Trend Micro to help protect our customers:

• Lynn working with Trend Micro's Zero Day Initiative

External Reference(s)

• ZDI-CAN-12151