# CVE-2022-33139: Auth bypass in Cerberus DMS

> Attackers can impersonate users or exploit protocols without authentication when server-side or Kerberos authentication is disabled in Siemens SCADA systems.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 21 Jun 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-28c6-247x-r9mw

## What is CVE-2022-33139?

CVE-2022-33139 is a critical authentication bypass vulnerability in Siemens Cerberus DMS, published on 21 Jun 2022. 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 Cerberus DMS (All versions), Desigo CC (All versions), Desigo CC Compact (All versions), SIMATIC WinCC OA V3.16 (All versions in default configuration), SIMATIC WinCC OA V3.17 (All versions in non-default configuration), SIMATIC WinCC OA V3.18 (All versions in non-default configuration). Affected applications use client-side only authentication, when neither server-side authentication (SSA) nor Kerberos authentication is enabled. In this configuration, attackers could impersonate other users or exploit the client-server protocol without being authenticated.

Weakness: CWE-287 (Improper Authentication), CWE-603 (Use of Client-Side Authentication)

## Which versions are affected by CVE-2022-33139?

It affects 4 products.


Products: Siemens Cerberus Dms, Siemens Desigo Cc, Siemens Desigo Cc Compact, Siemens Wincc Open Architecture.

## How do I fix CVE-2022-33139?

No fix has been published for CVE-2022-33139 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-33139 being exploited?

There is no known exploitation of CVE-2022-33139 in the wild and no public exploit code.

## Other vulnerabilities in Siemens Cerberus DMS

- [CVE-2021-37181](https://insights.sbomify.com/CVE-2021-37181/): Deserialization in Cerberus DMS V4.0 (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-33139 and fix it if it is affected.

What it is: CVE-2022-33139 is a critical authentication bypass vulnerability in Siemens Cerberus DMS, published on 21 Jun 2022. 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-2022-33139 in the wild and no public exploit code.

Affected product: Siemens Cerberus DMS. 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-2022-33139/ (Markdown: https://insights.sbomify.com/CVE-2022-33139/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-33139
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-33139
- OSV: https://osv.dev/vulnerability/CVE-2022-33139

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-33139/
Summaries are generated and may contain mistakes; the official description above is the record.