# CVE-2022-33137: Auth bypass in SIMATIC MV540 H

> Authenticated attackers can hijack user sessions due to improper session invalidation on logout in Siemens SIMATIC MV series devices.

- **Severity:** High 8.0 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Jul 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-jp3h-x882-5crh

## What is CVE-2022-33137?

CVE-2022-33137 is a high-severity authentication bypass vulnerability in Siemens SIMATIC MV540 H, published on 12 Jul 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A vulnerability has been identified in SIMATIC MV540 H (All versions < V3.3), SIMATIC MV540 S (All versions < V3.3), SIMATIC MV550 H (All versions < V3.3), SIMATIC MV550 S (All versions < V3.3), SIMATIC MV560 U (All versions < V3.3), SIMATIC MV560 X (All versions < V3.3). The web session management of affected devices does not invalidate session ids in certain logout scenarios. This could allow an authenticated remote attacker to hijack other users' sessions.

Weakness: CWE-613 (DEPRECATED: Insufficient Session Expiration)

## Which versions are affected by CVE-2022-33137?

It affects 6 products.


Products: Siemens Simatic Mv540 H Firmware, Siemens Simatic Mv540 S Firmware, Siemens Simatic Mv550 H Firmware, Siemens Simatic Mv550 S Firmware, Siemens Simatic Mv560 U Firmware, Siemens Simatic Mv560 X Firmware.

## How do I fix CVE-2022-33137?

No fix has been published for CVE-2022-33137 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-33137 being exploited?

There is no known exploitation of CVE-2022-33137 in the wild and no public exploit code.

## Other vulnerabilities in Siemens SIMATIC MV540 H

- [CVE-2023-36521](https://insights.sbomify.com/CVE-2023-36521/): Denial of service in SIMATIC MV540 H (high 8.6)
- [CVE-2023-35920](https://insights.sbomify.com/CVE-2023-35920/): Denial of service in SIMATIC MV540 H (high 7.5)
- [CVE-2023-35921](https://insights.sbomify.com/CVE-2023-35921/): Denial of service in SIMATIC MV540 H (high 7.5)
- [CVE-2022-33138](https://insights.sbomify.com/CVE-2022-33138/): Missing authorization in SIMATIC MV540 H (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-33137 and fix it if it is affected.

What it is: CVE-2022-33137 is a high-severity authentication bypass vulnerability in Siemens SIMATIC MV540 H, published on 12 Jul 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2022-33137 in the wild and no public exploit code.

Affected product: Siemens SIMATIC MV540 H. 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-2022-33137/ (Markdown: https://insights.sbomify.com/CVE-2022-33137/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-33137
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-33137
- OSV: https://osv.dev/vulnerability/CVE-2022-33137

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-33137/
Summaries are generated and may contain mistakes; the official description above is the record.