# CVE-2024-41798: Auth bypass in SENTRON 7KM PAC3200

> Attackers can bypass administrative access controls on SENTRON 7KM PAC3200 devices by brute-forcing the weak 4-digit PIN or sniffing clear-text Modbus traffic.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Oct 2024
- **Updated:** 8 Oct 2024
- **Also known as:** GHSA-rcxw-v8q3-f2f8

## What is CVE-2024-41798?

CVE-2024-41798 is a critical authentication bypass vulnerability in Siemens SENTRON 7KM PAC3200, published on 8 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been identified in SENTRON 7KM PAC3200 (All versions). Affected devices only provide a 4-digit PIN to protect from administrative access via Modbus TCP interface. Attackers with access to the Modbus TCP interface could easily bypass this protection by brute-force attacks or by sniffing the Modbus clear text communication.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2024-41798?


## How do I fix CVE-2024-41798?

No fix has been published for CVE-2024-41798 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-41798 being exploited?

There is no known exploitation of CVE-2024-41798 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-41798 and fix it if it is affected.

What it is: CVE-2024-41798 is a critical authentication bypass vulnerability in Siemens SENTRON 7KM PAC3200, published on 8 Oct 2024. 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-2024-41798 in the wild and no public exploit code.

Affected product: Siemens SENTRON 7KM PAC3200. 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-2024-41798/ (Markdown: https://insights.sbomify.com/CVE-2024-41798/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-41798
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-41798
- OSV: https://osv.dev/vulnerability/CVE-2024-41798

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-41798/
Summaries are generated and may contain mistakes; the official description above is the record.