# CVE-2022-32136: Codesys runtime systems: Access of uninitialised pointer lead to denial of service.

> A remote attacker can cause a denial of service in CODESYS runtime systems by triggering a read access to an uninitialized pointer.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Jun 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-c3w4-9vwq-3594

## What is CVE-2022-32136?

CVE-2022-32136 is a medium-severity vulnerability in CODESYS PLCWinNT, published on 24 Jun 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In multiple CODESYS products, a low privileged remote attacker may craft a request that cause a read access to an uninitialized pointer, resulting in a denial-of-service. User interaction is not required.

Weakness: CWE-824 (Access of Uninitialized Pointer)

## Which versions are affected by CVE-2022-32136?

It affects 2 products.


Products: Codesys Plcwinnt, Codesys Runtime Toolkit.

## How do I fix CVE-2022-32136?

No fix has been published for CVE-2022-32136 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-32136 being exploited?

There is no known exploitation of CVE-2022-32136 in the wild and no public exploit code.

## Other vulnerabilities in CODESYS PLCWinNT

- [CVE-2022-31806](https://insights.sbomify.com/CVE-2022-31806/): Insecure default settings in CODESYS Runtime Toolkit 32 bit full and CODESYS PLCWinNT (critical 9.8)
- [CVE-2022-32137](https://insights.sbomify.com/CVE-2022-32137/): CODESYS Runtime System prone to heap based buffer overflow (high 8.8)
- [CVE-2022-32138](https://insights.sbomify.com/CVE-2022-32138/): CODESYS runtime system prone to denial of service due to Unexpected Sign Extension (high 8.8)
- [CVE-2022-32143](https://insights.sbomify.com/CVE-2022-32143/): CODESYS runtime system prone to directory acces (high 8.8)
- [CVE-2022-1965](https://insights.sbomify.com/CVE-2022-1965/): CODESYS runtime system prone to file deletion due to improper error handling (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-32136 and fix it if it is affected.

What it is: CVE-2022-32136 is a medium-severity vulnerability in CODESYS PLCWinNT, published on 24 Jun 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-32136 in the wild and no public exploit code.

Affected product: CODESYS PLCWinNT. 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-2022-32136/ (Markdown: https://insights.sbomify.com/CVE-2022-32136/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-32136
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-32136
- OSV: https://osv.dev/vulnerability/CVE-2022-32136

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-32136/
Summaries are generated and may contain mistakes; the official description above is the record.