# CVE-2020-16243: Memory corruption in LeviStudioU

> Attackers can execute arbitrary code by tricking users into opening malicious project files in LeviStudioU, posing a risk to industrial control system operators.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **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 available:** No
- **Published:** 23 Feb 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-fj3m-f5px-cp9p

## What is CVE-2020-16243?

CVE-2020-16243 is a high-severity memory corruption vulnerability in LeviStudioU, published on 23 Feb 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

Multiple buffer overflow vulnerabilities exist when LeviStudioU (Version 2019-09-21 and prior) processes project files. Opening a specially crafted project file could allow an attacker to exploit and execute code under the privileges of the application.

Weakness: CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2020-16243?

It affects 1 product.


Products: We-Con Levistudiou.

## How do I fix CVE-2020-16243?

No fix has been published for CVE-2020-16243 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-16243 being exploited?

There is no known exploitation of CVE-2020-16243 in the wild and no public exploit code.

## Other vulnerabilities in LeviStudioU

- [CVE-2018-10610](https://insights.sbomify.com/CVE-2018-10610/): Memory corruption in LeviStudioU (high 8.8)
- [CVE-2018-10614](https://insights.sbomify.com/CVE-2018-10614/): XML external entity in LeviStudioU (high 8.8)
- [CVE-2018-10602](https://insights.sbomify.com/CVE-2018-10602/): Memory corruption in LeviStudioU (high 8.8)
- [CVE-2018-10606](https://insights.sbomify.com/CVE-2018-10606/): Memory corruption in LeviStudioU (high 8.8)
- [CVE-2021-23138](https://insights.sbomify.com/CVE-2021-23138/): WECON LeviStudioU (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-16243 and fix it if it is affected.

What it is: CVE-2020-16243 is a high-severity memory corruption vulnerability in LeviStudioU, published on 23 Feb 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.
Exploitation: There is no known exploitation of CVE-2020-16243 in the wild and no public exploit code.

Affected product: LeviStudioU. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-16243/ (Markdown: https://insights.sbomify.com/CVE-2020-16243/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-16243
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-16243
- OSV: https://osv.dev/vulnerability/CVE-2020-16243

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-16243/
Summaries are generated and may contain mistakes; the official description above is the record.