CVE-2021-33439 Integer overflow in n/a
An integer overflow in the mJS JavaScript engine's garbage collection can lead to a null pointer dereference and denial of service.
- 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-2021-33439?
CVE-2021-33439 is a medium-severity vulnerability in Cesanta Mjs, published on 26 Jul 2022. 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
An issue was discovered in mjs (mJS: Restricted JavaScript engine), ES6 (JavaScript version 6). There is Integer overflow in gc_compact_strings() in mjs.c.
Which versions are affected by CVE-2021-33439?
It affects 1 product.
Products include Cesanta Mjs.
How do I fix CVE-2021-33439?
No fix has been published for CVE-2021-33439 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-33439 being exploited?
There is no known exploitation of CVE-2021-33439 in the wild and no public exploit code.
Other vulnerabilities in Cesanta Mjs
Sources
Also known as GHSA-h6mp-42gx-78qp.