# CVE-2020-15387: Weak cryptography in Brocade SANnav & Brocade Fabric OS

> Brocade Fabric OS and SANnav use weak SSH keys, allowing man-in-the-middle attacks on secure communications.

- **Severity:** High 7.4 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 9 Jun 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-wv2h-444w-8xv6

## What is CVE-2020-15387?

CVE-2020-15387 is a high-severity vulnerability in Broadcom Brocade Sannav, published on 9 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The host SSH servers of Brocade Fabric OS before Brocade Fabric OS v7.4.2h, v8.2.1c, v8.2.2, v9.0.0, and Brocade SANnav before v2.1.1 utilize keys of less than 2048 bits, which may be vulnerable to man-in-the-middle attacks and/or insecure SSH communications.

Weakness: CWE-326 (Inadequate Encryption Strength)

## Which versions are affected by CVE-2020-15387?

It affects 2 products.


Products: Broadcom Brocade Sannav, Broadcom Fabric Operating System.

## How do I fix CVE-2020-15387?

No fix has been published for CVE-2020-15387 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-15387 being exploited?

There is no known exploitation of CVE-2020-15387 in the wild and no public exploit code.

## Other vulnerabilities in Broadcom Brocade Sannav

- [CVE-2019-16211](https://insights.sbomify.com/CVE-2019-16211/): Hardcoded credentials in Brocade SANnav (critical 9.8)
- [CVE-2024-3596](https://insights.sbomify.com/CVE-2024-3596/): RADIUS Protocol under RFC2865 is vulnerable to forgery attacks. (critical 9.0)
- [CVE-2019-16212](https://insights.sbomify.com/CVE-2019-16212/): A vulnerability in Brocade SANnav versions before v2.1.0 could allow a remote authenticated attacker to conduct an LDAP injection. (high 8.8)
- [CVE-2019-16205](https://insights.sbomify.com/CVE-2019-16205/): Weak cryptography in Brocade SANnav (high 8.8)
- [CVE-2024-2240](https://insights.sbomify.com/CVE-2024-2240/): Docker implementation in Brocade SANnav is missing Audit Rules. (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-15387 and fix it if it is affected.

What it is: CVE-2020-15387 is a high-severity vulnerability in Broadcom Brocade Sannav, published on 9 Jun 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-2020-15387 in the wild and no public exploit code.

Affected product: Broadcom Brocade Sannav. 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-2020-15387/ (Markdown: https://insights.sbomify.com/CVE-2020-15387/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-15387
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-15387
- OSV: https://osv.dev/vulnerability/CVE-2020-15387

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-15387/
Summaries are generated and may contain mistakes; the official description above is the record.