# CVE-2023-4834: Missing authorization in mbCONNECT24

> Authenticated low-privileged attackers can access unauthorized device information due to improper access validation in Red Lion and Helmholz industrial gateways.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`)
- **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:** 16 Oct 2023
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-rqp9-whcw-xww5

## What is CVE-2023-4834?

CVE-2023-4834 is a medium-severity missing authorization vulnerability in Helmholz mbCONNECT24, published on 16 Oct 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In Red Lion Europe mbCONNECT24 and mymbCONNECT24 and Helmholz myREX24 and myREX24.virtual up to and including 2.14.2 an improperly implemented access validation allows an authenticated, low privileged attacker to gain read access to limited, non-critical device information in his account he should not have access to.

Weakness: CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2023-4834?

It affects 4 products.


Products: Helmholz Myrex24, Helmholz Myrex24.virtual, Mbconnectline Mbconnect24, Mbconnectline Mymbconnect24.

## How do I fix CVE-2023-4834?

No fix has been published for CVE-2023-4834 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-4834 being exploited?

There is no known exploitation of CVE-2023-4834 in the wild and no public exploit code.

## Other vulnerabilities in Helmholz mbCONNECT24

- [CVE-2020-35558](https://insights.sbomify.com/CVE-2020-35558/): SSRF in products of MB connect line and Helmholz (high 7.5)
- [CVE-2020-12527](https://insights.sbomify.com/CVE-2020-12527/): Improper Access Validation in products of MB connect line and Helmholz (medium 6.5)
- [CVE-2020-35557](https://insights.sbomify.com/CVE-2020-35557/): Improper Access Validation in products of MB connect line and Helmholz (medium 6.5)
- [CVE-2022-22520](https://insights.sbomify.com/CVE-2022-22520/): User enumeration vulnerability in MB connect line and Helmholz products (medium 5.3)
- [CVE-2020-35561](https://insights.sbomify.com/CVE-2020-35561/): SSRF in variuos products of MB connect line and Helmholz (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-4834 and fix it if it is affected.

What it is: CVE-2023-4834 is a medium-severity missing authorization vulnerability in Helmholz mbCONNECT24, published on 16 Oct 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-4834 in the wild and no public exploit code.

Affected product: Helmholz mbCONNECT24. 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-2023-4834/ (Markdown: https://insights.sbomify.com/CVE-2023-4834/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-4834
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-4834
- OSV: https://osv.dev/vulnerability/CVE-2023-4834

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-4834/
Summaries are generated and may contain mistakes; the official description above is the record.