CVE-2021-45442 Path traversal in Trend Micro Worry-Free Business Security

High 7.1 Published 8 Jan 2022 Updated 4 Aug 2024

A local attacker with low privileges can overwrite arbitrary files as SYSTEM, leading to privilege escalation or denial of service in Trend Micro Worry-Free Business Security.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-45442?

CVE-2021-45442 is a high-severity path traversal vulnerability in Trendmicro Apex One, published on 8 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A link following denial-of-service vulnerability in Trend Micro Worry-Free Business Security (on prem only) could allow a local attacker to overwrite arbitrary files in the context of SYSTEM. This is similar to, but not the same as CVE-2021-44024. Please note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

Weakness: CWE-59

Which versions are affected by CVE-2021-45442?

It affects 3 products.

Products include Trendmicro Apex One, Trendmicro Worry-Free Business Security, Trendmicro Worry-Free Business Security Services.

How do I fix CVE-2021-45442?

No fix has been published for CVE-2021-45442 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2021-45442 being exploited?

There is no known exploitation of CVE-2021-45442 in the wild and no public exploit code.

All Trendmicro Apex One vulnerabilities

Sources

Also known as GHSA-vj44-3f5x-mrmp.