# CVE-2022-4636: Path traversal in KVM ACR1000A-R-R2

> Path traversal in Black Box KVM firmware allows attackers to steal user credentials and sensitive information via local file inclusion.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:** 10 Jan 2023
- **Updated:** 16 Jan 2025
- **Also known as:** GHSA-746p-8vmw-cpvx

## What is CVE-2022-4636?

CVE-2022-4636 is a high-severity path traversal vulnerability in Black Box KVM ACR1000A-R-R2, published on 10 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Black Box KVM Firmware version 3.4.31307 on models ACR1000A-R-R2, ACR1000A-T-R2, ACR1002A-T, ACR1002A-R, and ACR1020A-T is vulnerable to path traversal, which may allow an attacker to steal user credentials and other sensitive information through local file inclusion.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2022-4636?

It affects 5 products.


Products: Blackbox Acr1000a-R-R2 Firmware, Blackbox Acr1000a-T-R2 Firmware, Blackbox Acr1002a-R Firmware, Blackbox Acr1002a-T Firmware, Blackbox Acr1020a-T Firmware.

## How do I fix CVE-2022-4636?

No fix has been published for CVE-2022-4636 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-4636 being exploited?

There is no known exploitation of CVE-2022-4636 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-4636 and fix it if it is affected.

What it is: CVE-2022-4636 is a high-severity path traversal vulnerability in Black Box KVM ACR1000A-R-R2, published on 10 Jan 2023. 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-2022-4636 in the wild and no public exploit code.

Affected product: Black Box KVM ACR1000A-R-R2. 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-2022-4636/ (Markdown: https://insights.sbomify.com/CVE-2022-4636/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-4636
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-4636
- OSV: https://osv.dev/vulnerability/CVE-2022-4636

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-4636/
Summaries are generated and may contain mistakes; the official description above is the record.