# CVE-2021-22393: Denial of service in CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800

> Attackers can cause denial of service on Huawei CloudEngine switches by sending specific messages, disrupting normal network operations.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-2ggh-r3h4-fjpw

## What is CVE-2021-22393?

CVE-2021-22393 is a high-severity denial of service vulnerability in CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800, published on 28 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

There is a denial of service vulnerability in some versions of CloudEngine 5800, CloudEngine 6800, CloudEngine 7800 and CloudEngine 12800. The affected product cannot deal with some messages because of module design weakness . Attackers can exploit this vulnerability by sending a large amount of specific messages to cause denial of service. This can compromise normal service.

## Which versions are affected by CVE-2021-22393?

It affects 4 products.


Products: Huawei Cloudengine 12800 Firmware, Huawei Cloudengine 5800, Huawei Cloudengine 6800 Firmware, Huawei Cloudengine 7800 Firmware.

## How do I fix CVE-2021-22393?

No fix has been published for CVE-2021-22393 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-22393 being exploited?

There is no known exploitation of CVE-2021-22393 in the wild and no public exploit code.

## Other vulnerabilities in CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800

- [CVE-2016-6178](https://insights.sbomify.com/CVE-2016-6178/): Other in n/a (critical 9.8)
- [CVE-2020-9207](https://insights.sbomify.com/CVE-2020-9207/): Auth bypass in CloudEngine 12800 (high 7.8)
- [CVE-2021-40008](https://insights.sbomify.com/CVE-2021-40008/): Denial of service in CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800 (high 7.5)
- [CVE-2021-22328](https://insights.sbomify.com/CVE-2021-22328/): Denial of service in CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800 (high 7.5)
- [CVE-2021-22332](https://insights.sbomify.com/CVE-2021-22332/): Use after free in CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800 (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-22393 and fix it if it is affected.

What it is: CVE-2021-22393 is a high-severity denial of service vulnerability in CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800, published on 28 Apr 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-2021-22393 in the wild and no public exploit code.

Affected product: CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800. 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-2021-22393/ (Markdown: https://insights.sbomify.com/CVE-2021-22393/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-22393
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-22393
- OSV: https://osv.dev/vulnerability/CVE-2021-22393

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-22393/
Summaries are generated and may contain mistakes; the official description above is the record.