# CVE-2023-6928: Improper Restriction of Excessive Authentication Attempts

> Attackers can brute-force administrative credentials on EuroTel ETL3100 devices due to missing rate limiting, gaining full system control.

- **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:** 19 Dec 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-cgpg-x4hh-6j98

## What is CVE-2023-6928?

CVE-2023-6928 is a critical authentication bypass vulnerability in EuroTel ETL3100, published on 19 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

EuroTel ETL3100 versions v01c01 and v01x37 does not limit the number of attempts to guess administrative credentials in remote password attacks to gain full control of the system.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2023-6928?

It affects 1 product.


Products: Eurotel Etl3100 Firmware.

## How do I fix CVE-2023-6928?

No fix has been published for CVE-2023-6928 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6928 being exploited?

There is no known exploitation of CVE-2023-6928 in the wild and no public exploit code.

## Other vulnerabilities in EuroTel ETL3100

- [CVE-2023-6930](https://insights.sbomify.com/CVE-2023-6930/): Improper Access Control in EuroTel ETL3100 (critical 9.4)
- [CVE-2023-6929](https://insights.sbomify.com/CVE-2023-6929/): Authorization Bypass Through User-Controlled Key in EuroTel ETL3100 (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6928 and fix it if it is affected.

What it is: CVE-2023-6928 is a critical authentication bypass vulnerability in EuroTel ETL3100, published on 19 Dec 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-2023-6928 in the wild and no public exploit code.

Affected product: EuroTel ETL3100. 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-2023-6928/ (Markdown: https://insights.sbomify.com/CVE-2023-6928/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6928
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6928
- OSV: https://osv.dev/vulnerability/CVE-2023-6928

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6928/
Summaries are generated and may contain mistakes; the official description above is the record.