CVE-2021-20836 Memory corruption in OMRON CX-Supervisor
An attacker with admin privileges can trigger an out-of-bounds read via crafted project files, leading to information disclosure or code execution in OMRON CX-Supervisor.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-20836?
CVE-2021-20836 is a medium-severity memory corruption vulnerability in OMRON CX-Supervisor, published on 19 Oct 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
Out-of-bounds read vulnerability in CX-Supervisor v4.0.0.13 and v4.0.0.16 allows an attacker with administrative privileges to cause information disclosure and/or arbitrary code execution by opening a specially crafted SCS project files.
Weakness: CWE-125
Which versions are affected by CVE-2021-20836?
It affects 1 product.
Products include Omron Cx-Supervisor.
How do I fix CVE-2021-20836?
No fix has been published for CVE-2021-20836 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-2021-20836 being exploited?
There is no known exploitation of CVE-2021-20836 in the wild and no public exploit code.
Other vulnerabilities in OMRON CX-Supervisor
Sources
Also known as GHSA-vphf-83wr-763v.