# CVE-2021-29242: Other in n/a

> Attackers can manipulate communication routing in CODESYS Control Runtime by sending crafted packets, potentially altering low-level communication packages.

- **Severity:** High 7.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 May 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-85g9-hgxq-755v

## What is CVE-2021-29242?

CVE-2021-29242 is a high-severity vulnerability in Codesys Control for Beaglebone Sl, published on 3 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send crafted communication packets to change the router's addressing scheme and may re-route, add, remove or change low level communication packages.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2021-29242?

It affects 22 products.


Products: Codesys Control for Beaglebone Sl, Codesys Control for Empc-A\/Imx6 Sl, Codesys Control for Iot2000 Sl, Codesys Control for Linux Arm Sl, Codesys Control for Linux Sl, Codesys Control for Pfc100 Sl, Codesys Control for Pfc200 Sl, Codesys Control for Plcnext Sl, Codesys Control for Raspberry Pi Sl, Codesys Control for Wago Touch Panels 600 Sl, Codesys Control Rte, Codesys Control Runtime System Toolkit, Codesys Control Win, Codesys Edge Gateway, Codesys Embedded Target Visu Toolkit, Codesys Gateway, Codesys Hmi, Codesys Opc Server, Codesys Plchandler, Codesys Remote Target Visu Toolkit and 2 more.

## How do I fix CVE-2021-29242?

No fix has been published for CVE-2021-29242 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-29242 being exploited?

There is no known exploitation of CVE-2021-29242 in the wild and no public exploit code.

## Other vulnerabilities in Codesys Control for Beaglebone Sl

- [CVE-2019-9010](https://insights.sbomify.com/CVE-2019-9010/): Missing authorization in n/a (critical 9.8)
- [CVE-2018-10612](https://insights.sbomify.com/CVE-2018-10612/): Misconfiguration in 3S-Smart Software Solutions GmbH CODESYS Control V3 products prior to version 3.5.14.0 (critical 9.8)
- [CVE-2023-6357](https://insights.sbomify.com/CVE-2023-6357/): OS Command Injection in multiple CODESYS products (high 8.8)
- [CVE-2022-4046](https://insights.sbomify.com/CVE-2022-4046/): CODESYS: Improper memory restrictions fro CODESYS Control (high 8.8)
- [CVE-2022-47379](https://insights.sbomify.com/CVE-2022-47379/): CODESYS: Multiple products prone to out-of-bounds write (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-29242 and fix it if it is affected.

What it is: CVE-2021-29242 is a high-severity vulnerability in Codesys Control for Beaglebone Sl, published on 3 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-29242 in the wild and no public exploit code.

Affected product: Codesys Control for Beaglebone Sl. 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-2021-29242/ (Markdown: https://insights.sbomify.com/CVE-2021-29242/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-29242
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-29242
- OSV: https://osv.dev/vulnerability/CVE-2021-29242

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-29242/
Summaries are generated and may contain mistakes; the official description above is the record.