# CVE-2021-20256: Information disclosure in Red Hat Satellite

> An authenticated local attacker with view_hosts permission can expose BMC passwords via the API, compromising confidentiality, integrity, and availability.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 23 Feb 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-7h9m-xcfj-p257

## What is CVE-2021-20256?

CVE-2021-20256 is a medium-severity vulnerability in Redhat Satellite, published on 23 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A flaw was found in Red Hat Satellite. The BMC interface exposes the password through the API to an authenticated local attacker with view_hosts permission. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2021-20256?

It affects 1 product.


Products: Redhat Satellite.

## How do I fix CVE-2021-20256?

Apply the vendor's patch.

## Is CVE-2021-20256 being exploited?

There is no known exploitation of CVE-2021-20256 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Satellite

- [CVE-2024-7012](https://insights.sbomify.com/CVE-2024-7012/): Puppet-foreman: an authentication bypass vulnerability exists in foreman (critical 9.8)
- [CVE-2024-7923](https://insights.sbomify.com/CVE-2024-7923/): Puppet-pulpcore: an authentication bypass vulnerability exists in pulpcore (critical 9.8)
- [CVE-2026-96659](https://insights.sbomify.com/CVE-2026-96659/): Foreman: excessive permissions for viewer role on preview (critical 9.1)
- [CVE-2023-0118](https://insights.sbomify.com/CVE-2023-0118/): Foreman: arbitrary code execution through templates (critical 9.1)
- [CVE-2008-2369](https://insights.sbomify.com/CVE-2008-2369/): Hardcoded credentials in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-20256 and fix it if it is affected.

What it is: CVE-2021-20256 is a medium-severity vulnerability in Redhat Satellite, published on 23 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-20256 in the wild and no public exploit code.

Affected product: Redhat Satellite. 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-2021-20256/ (Markdown: https://insights.sbomify.com/CVE-2021-20256/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-20256
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-20256
- OSV: https://osv.dev/vulnerability/CVE-2021-20256

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-20256/
Summaries are generated and may contain mistakes; the official description above is the record.