# CVE-2023-3569: PHOENIX CONTACT: Denial-of-Service due to malicious XML files in TC ROUTER, TC CLOUD CLIENT and CLOUD CLIENT

> An authenticated admin can cause denial of service by uploading a malicious XML file to PHOENIX CONTACT routers and cloud clients.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Aug 2023
- **Updated:** 27 Feb 2025
- **Also known as:** GHSA-4322-9574-7cv6

## What is CVE-2023-3569?

CVE-2023-3569 is a medium-severity vulnerability in PHOENIX CONTACT CLOUD CLIENT 1101T-TX/TX, published on 8 Aug 2023. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

In PHOENIX CONTACTs TC ROUTER and TC CLOUD CLIENT in versions prior to 2.07.2  as well as CLOUD CLIENT 1101T-TX/TX prior to 2.06.10 an authenticated remote attacker with admin privileges could upload a crafted XML file which causes a denial-of-service.

Weakness: CWE-776 (Improper Restriction of Recursive Entity References in DTDs)

## Which versions are affected by CVE-2023-3569?

It affects 7 products.


Products: Phoenixcontact Cloud Client 1101t-Tx Firmware, Phoenixcontact Tc Cloud Client 1002-4g Att Firmware, Phoenixcontact Tc Cloud Client 1002-4g Firmware, Phoenixcontact Tc Cloud Client 1002-4g Vzw Firmware, Phoenixcontact Tc Router 3002t-4g Att Firmware, Phoenixcontact Tc Router 3002t-4g Firmware, Phoenixcontact Tc Router 3002t-4g Vzw Firmware.

## How do I fix CVE-2023-3569?

No fix has been published for CVE-2023-3569 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-3569 being exploited?

There is no known exploitation of CVE-2023-3569 in the wild and no public exploit code.

## Other vulnerabilities in PHOENIX CONTACT CLOUD CLIENT 1101T-TX/TX

- [CVE-2023-3526](https://insights.sbomify.com/CVE-2023-3526/): PHOENIX CONTACT: Cross-site Scripting vulnerability in TC ROUTER, TC CLOUD CLIENT and CLOUD CLIENT devices (critical 9.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-3569 and fix it if it is affected.

What it is: CVE-2023-3569 is a medium-severity vulnerability in PHOENIX CONTACT CLOUD CLIENT 1101T-TX/TX, published on 8 Aug 2023. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-3569 in the wild and no public exploit code.

Affected product: PHOENIX CONTACT CLOUD CLIENT 1101T-TX/TX. 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-2023-3569/ (Markdown: https://insights.sbomify.com/CVE-2023-3569/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-3569
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3569
- OSV: https://osv.dev/vulnerability/CVE-2023-3569

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-3569/
Summaries are generated and may contain mistakes; the official description above is the record.