# CVE-2019-12621: Cisco HyperFlex Static SSL Key Vulnerability

> An unauthenticated remote attacker can perform man-in-the-middle attacks against cluster nodes due to insufficient key management in Cisco HyperFlex.

- **Severity:** Medium 6.8 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 Aug 2019
- **Updated:** 20 Nov 2024
- **Also known as:** GHSA-mghj-97x2-4v8w

## What is CVE-2019-12621?

CVE-2019-12621 is a medium-severity vulnerability in Cisco HyperFlex HX-Series, published on 21 Aug 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability in Cisco HyperFlex Software could allow an unauthenticated, remote attacker to perform a man-in-the-middle attack. The vulnerability is due to insufficient key management. An attacker could exploit this vulnerability by obtaining a specific encryption key for the cluster. A successful exploit could allow the attacker to perform a man-in-the-middle attack against other nodes in the cluster.

Weakness: CWE-327 (Use of a Broken or Risky Cryptographic Algorithm), CWE-320

## Which versions are affected by CVE-2019-12621?

It affects 5 products.


Products: Cisco Hyperflex Hx220c Af M5 Firmware, Cisco Hyperflex Hx220c Edge M5 Firmware, Cisco Hyperflex Hx220c M5 Firmware, Cisco Hyperflex Hx240c Af M5 Firmware, Cisco Hyperflex Hx240c M5 Firmware.

## How do I fix CVE-2019-12621?

No fix has been published for CVE-2019-12621 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-12621 being exploited?

There is no known exploitation of CVE-2019-12621 in the wild and no public exploit code.

## Other vulnerabilities in Cisco HyperFlex HX-Series

- [CVE-2019-1975](https://insights.sbomify.com/CVE-2019-1975/): Cisco HyperFlex Software Cross-Frame Scripting Vulnerability (medium 6.5)
- [CVE-2019-12620](https://insights.sbomify.com/CVE-2019-12620/): Cisco HyperFlex Software Counter Value Injection Vulnerability (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-12621 and fix it if it is affected.

What it is: CVE-2019-12621 is a medium-severity vulnerability in Cisco HyperFlex HX-Series, published on 21 Aug 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-12621 in the wild and no public exploit code.

Affected product: Cisco HyperFlex HX-Series. 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-2019-12621/ (Markdown: https://insights.sbomify.com/CVE-2019-12621/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-12621
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-12621
- OSV: https://osv.dev/vulnerability/CVE-2019-12621

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-12621/
Summaries are generated and may contain mistakes; the official description above is the record.