# CVE-2021-32939: Memory corruption in FATEK Automation FvDesigner

> An attacker can achieve arbitrary code execution by tricking a user into opening a maliciously crafted project file in FATEK Automation FvDesigner.

- **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:** 11 Aug 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-rg89-7h29-3hx2

## What is CVE-2021-32939?

CVE-2021-32939 is a high-severity memory corruption vulnerability in FATEK Automation FvDesigner, published on 11 Aug 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

FATEK Automation FvDesigner, Versions 1.5.88 and prior is vulnerable to an out-of-bounds write while processing project files, allowing an attacker to craft a project file that may permit arbitrary code execution.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2021-32939?

It affects 1 product.


Products: Fatek Fvdesigner.

## How do I fix CVE-2021-32939?

No fix has been published for CVE-2021-32939 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-32939 being exploited?

There is no known exploitation of CVE-2021-32939 in the wild and no public exploit code.

## Other vulnerabilities in FATEK Automation FvDesigner

- [CVE-2023-34262](https://insights.sbomify.com/CVE-2023-34262/): Fatek Automation FvDesigner FPJ File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability (high 7.8)
- [CVE-2023-34263](https://insights.sbomify.com/CVE-2023-34263/): Fatek Automation FvDesigner FPJ File Parsing Uninitialized Pointer Remote Code Execution Vulnerability (high 7.8)
- [CVE-2023-34264](https://insights.sbomify.com/CVE-2023-34264/): Fatek Automation FvDesigner FPJ File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability (high 7.8)
- [CVE-2023-34265](https://insights.sbomify.com/CVE-2023-34265/): Fatek Automation FvDesigner FPJ File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability (high 7.8)
- [CVE-2023-34266](https://insights.sbomify.com/CVE-2023-34266/): Fatek Automation FvDesigner FPJ File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-32939 and fix it if it is affected.

What it is: CVE-2021-32939 is a high-severity memory corruption vulnerability in FATEK Automation FvDesigner, published on 11 Aug 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-2021-32939 in the wild and no public exploit code.

Affected product: FATEK Automation FvDesigner. 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-2021-32939/ (Markdown: https://insights.sbomify.com/CVE-2021-32939/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-32939
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-32939
- OSV: https://osv.dev/vulnerability/CVE-2021-32939

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-32939/
Summaries are generated and may contain mistakes; the official description above is the record.