CVE-2021-33004 Memory corruption in WebAccess HMI Designer

High 7.8 Published 24 Jun 2021 Updated 3 Aug 2024

An attacker can execute arbitrary code by tricking a user into opening a malicious file in WebAccess HMI Designer.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-33004?

CVE-2021-33004 is a high-severity memory corruption vulnerability in WebAccess HMI Designer, published on 24 Jun 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

The affected product is vulnerable to memory corruption condition due to lack of proper validation of user supplied files, which may allow an attacker to execute arbitrary code. User interaction is required on the WebAccess HMI Designer (versions 2.1.9.95 and prior).

Weakness: CWE-787, CWE-119

Which versions are affected by CVE-2021-33004?

It affects 1 product.

Products include Advantech Webaccess\/Hmi Designer.

How do I fix CVE-2021-33004?

No fix has been published for CVE-2021-33004 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-33004 being exploited?

There is no known exploitation of CVE-2021-33004 in the wild and no public exploit code.

Sources

Also known as GHSA-q569-xrrr-6gvr.