# CVE-2021-29847: Information disclosure in Power System S821LC Server (8001-12C)

> An authenticated user can enable an insecure communication channel, allowing attackers to intercept sensitive information via man-in-the-middle attacks.

- **Severity:** Medium 5.3 (`CVSS:3.0/PR:N/I:N/S:U/UI:R/C:H/AC:H/A:N/AV:N/E:U/RC:C/RL:O`)
- **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:** 15 Dec 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-8wxh-27vw-26wh

## What is CVE-2021-29847?

CVE-2021-29847 is a medium-severity vulnerability in IBM Power System S821LC Server (8001-12C), published on 15 Dec 2021. 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

BMC firmware (IBM Power System S821LC Server (8001-12C) OP825.50) configuration changed to allow an authenticated user to open an insecure communication channel which could allow an attacker to obtain sensitive information using man in the middle techniques. IBM X-Force ID: 205267.

## Which versions are affected by CVE-2021-29847?

It affects 5 products.


Products: Ibm Power Hardware Management Console \(7063-Cr1\) Firmware, Ibm Power System Cs821lc \(8005-12n\) Firmware, Ibm Power System Cs822lc \(8005-22n\) Firmware, Ibm Power System S821lc \(8001-12c\) Firmware, Ibm Power System S822lc \(8001-22c\) Firmware.

## How do I fix CVE-2021-29847?

No fix has been published for CVE-2021-29847 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-29847 being exploited?

There is no known exploitation of CVE-2021-29847 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-29847 and fix it if it is affected.

What it is: CVE-2021-29847 is a medium-severity vulnerability in IBM Power System S821LC Server (8001-12C), published on 15 Dec 2021. 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-2021-29847 in the wild and no public exploit code.

Affected product: IBM Power System S821LC Server (8001-12C). 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-2021-29847/ (Markdown: https://insights.sbomify.com/CVE-2021-29847/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-29847
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-29847
- OSV: https://osv.dev/vulnerability/CVE-2021-29847

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-29847/
Summaries are generated and may contain mistakes; the official description above is the record.