# CVE-2022-43606: Null dereference in OpENer

> An attacker can crash the OpENer EtherNet/IP server by sending crafted requests that trigger a null pointer dereference.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Mar 2023
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-xh44-7m8v-gqg4

## What is CVE-2022-43606?

CVE-2022-43606 is a high-severity vulnerability in EIP Stack Group OpENer, published on 16 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A use-of-uninitialized-pointer vulnerability exists in the Forward Open connection_management_entry functionality of EIP Stack Group OpENer development commit 58ee13c. A specially-crafted EtherNet/IP request can lead to use of a null pointer, causing the server to crash. An attacker can send a series of EtherNet/IP requests to trigger this vulnerability.

Weakness: CWE-824 (Access of Uninitialized Pointer)

## Which versions are affected by CVE-2022-43606?

It affects 1 product.


Products: Opener Project Opener.

## How do I fix CVE-2022-43606?

No fix has been published for CVE-2022-43606 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-43606 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-43606 exists.

## Other vulnerabilities in EIP Stack Group OpENer

- [CVE-2022-43604](https://insights.sbomify.com/CVE-2022-43604/): Memory corruption in OpENer (critical 10.0)
- [CVE-2022-43605](https://insights.sbomify.com/CVE-2022-43605/): Memory corruption in OpENer (critical 10.0)
- [CVE-2026-51540](https://insights.sbomify.com/CVE-2026-51540/): Integer overflow in n/a (critical 9.8)
- [CVE-2020-13556](https://insights.sbomify.com/CVE-2020-13556/): Memory corruption in EIP Stack Group (critical 9.8)
- [CVE-2026-51536](https://insights.sbomify.com/CVE-2026-51536/): Integer overflow in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-43606 and fix it if it is affected.

What it is: CVE-2022-43606 is a high-severity vulnerability in EIP Stack Group OpENer, published on 16 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-43606 exists.

Affected product: EIP Stack Group OpENer. 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-2022-43606/ (Markdown: https://insights.sbomify.com/CVE-2022-43606/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-43606
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-43606
- OSV: https://osv.dev/vulnerability/CVE-2022-43606

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-43606/
Summaries are generated and may contain mistakes; the official description above is the record.