CVE-2021-33000 Memory corruption in WebAccess HMI Designer

High 7.8 Published 24 Jun 2021 Updated 3 Aug 2024

Attackers can execute arbitrary code by tricking users into opening a malicious project 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-2021-33000?

CVE-2021-33000 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

Parsing a maliciously crafted project file may cause a heap-based buffer overflow, which may allow an attacker to perform arbitrary code execution. User interaction is required on the WebAccess HMI Designer (versions 2.1.9.95 and prior).

Weakness: CWE-787, CWE-122

Which versions are affected by CVE-2021-33000?

It affects 1 product.

Products include Advantech Webaccess\/Hmi Designer.

How do I fix CVE-2021-33000?

No fix has been published for CVE-2021-33000 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-2021-33000 being exploited?

There is no known exploitation of CVE-2021-33000 in the wild and no public exploit code.

Sources

Also known as GHSA-v5mq-7f48-6rhv.