# CVE-2023-23444: Missing authorization in FX0-GENT00000 FLEXISOFT EIP GATEW.

> Unauthenticated remote attackers can disrupt device availability by modifying IP settings via UDP packets on SICK Flexi gateways.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:** 12 May 2023
- **Updated:** 1 Jun 2026
- **Also known as:** GHSA-8w5h-774q-3rhm

## What is CVE-2023-23444?

CVE-2023-23444 is a high-severity missing authorization vulnerability in SICK AG FX0-GENT00000 FLEXISOFT EIP GATEW., published on 12 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Missing Authentication for Critical Function in SICK Flexi Classic and Flexi Soft Gateways with Partnumbers 1042193, 1042964, 1044078, 1044072, 1044073, 1044074, 1099830, 1099832, 1127717, 1069070, 1112296, 1051432, 1102420, 1127487, 1121596, 1121597 allows an unauthenticated remote attacker to influence the availability of the device by changing the IP settings of the device via broadcasted UDP packets.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2023-23444?

It affects 11 products.


Products: Sick Fx0-Gent00000 Firmware, Sick Fx0-Gent00010 Firmware, Sick Fx0-Gent00030 Firmware, Sick Fx0-Gmod00000 Firmware, Sick Fx0-Gmod00010 Firmware, Sick Fx0-Gpnt00000 Firmware, Sick Fx0-Gpnt00010 Firmware, Sick Fx0-Gpnt00030 Firmware, Sick Ue410-En1 Firmware, Sick Ue410-En3 Firmware, Sick Ue410-En4 Firmware.

## How do I fix CVE-2023-23444?

No fix has been published for CVE-2023-23444 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-23444 being exploited?

There is no known exploitation of CVE-2023-23444 in the wild and no public exploit code.

## Other vulnerabilities in SICK AG FX0-GENT00000 FLEXISOFT EIP GATEW.

- [CVE-2023-23451](https://insights.sbomify.com/CVE-2023-23451/): Hardcoded credentials in SICK FX0-GENT00000, SICK FX0-GENT00030, SICK FX0-GMOD00000, SICK FX0-GMOD00010, SICK FX0-GPNT00000, SICK FX0-GPNT00030, SICK UE410-EN1, SICK UE410-EN3, SICK UE410-EN3S04, SICK UE410-EN4 (critical 9.8)
- [CVE-2023-23453](https://insights.sbomify.com/CVE-2023-23453/): Missing authorization in FX0-GENT v3 Firmware (critical 9.8)
- [CVE-2023-5246](https://insights.sbomify.com/CVE-2023-5246/): Auth bypass in FX0-GENT00000 (high 8.8)
- [CVE-2019-14753](https://insights.sbomify.com/CVE-2019-14753/): Memory corruption in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-23444 and fix it if it is affected.

What it is: CVE-2023-23444 is a high-severity missing authorization vulnerability in SICK AG FX0-GENT00000 FLEXISOFT EIP GATEW., published on 12 May 2023. 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-2023-23444 in the wild and no public exploit code.

Affected product: SICK AG FX0-GENT00000 FLEXISOFT EIP GATEW.. 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-2023-23444/ (Markdown: https://insights.sbomify.com/CVE-2023-23444/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-23444
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-23444
- OSV: https://osv.dev/vulnerability/CVE-2023-23444

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-23444/
Summaries are generated and may contain mistakes; the official description above is the record.