# CVE-2021-28913: Hardcoded credentials in n/a

> Unauthenticated attackers can retrieve a hardcoded SSH passphrase to gain root access on eibPort V3 devices.

- **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:** 9 Sep 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-xwhc-mqxq-rj7w

## What is CVE-2021-28913?

CVE-2021-28913 is a critical vulnerability in n/a, published on 9 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

BAB TECHNOLOGIE GmbH eibPort V3 prior version 3.9.1 allow unauthenticated attackers access to /webif/SecurityModule to validate the so called and hard coded unique 'eibPort String' which acts as the root SSH key passphrase. This is usable and part of an attack chain to gain SSH root access.

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

## Which versions are affected by CVE-2021-28913?

It affects 1 product.


Products: Bab-Technologie Eibport Firmware.

## How do I fix CVE-2021-28913?

No fix has been published for CVE-2021-28913 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-28913 being exploited?

There is no known exploitation of CVE-2021-28913 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-28909](https://insights.sbomify.com/CVE-2021-28909/): Auth bypass in n/a (critical 9.8)
- [CVE-2021-28911](https://insights.sbomify.com/CVE-2021-28911/): Information disclosure in n/a (critical 9.8)
- [CVE-2021-28910](https://insights.sbomify.com/CVE-2021-28910/): Server-side request forgery in n/a (high 7.5)
- [CVE-2020-24573](https://insights.sbomify.com/CVE-2020-24573/): BAB TECHNOLOGIE GmbH eibPort V3 prior to 3.8.3 devices allow denial of service (Uncontrolled Resource Consumption) via requests to the lighttpd component. (high 7.5)
- [CVE-2021-28912](https://insights.sbomify.com/CVE-2021-28912/): Hardcoded credentials in n/a (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-28913 and fix it if it is affected.

What it is: CVE-2021-28913 is a critical vulnerability in n/a, published on 9 Sep 2021. 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-2021-28913 in the wild and no public exploit code.

Affected product: n/a. 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-2021-28913/ (Markdown: https://insights.sbomify.com/CVE-2021-28913/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-28913
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-28913
- OSV: https://osv.dev/vulnerability/CVE-2021-28913

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-28913/
Summaries are generated and may contain mistakes; the official description above is the record.