# CVE-2021-22304: Use after free in Taurus-AL00A

> Attackers can cause a module crash and service disruption by sending specific messages to the affected Huawei Taurus device.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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:** No
- **Published:** 6 Feb 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-fpwv-gp97-jc85

## What is CVE-2021-22304?

CVE-2021-22304 is a low-severity use after free vulnerability in Taurus-AL00A, published on 6 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

There is a use after free vulnerability in Taurus-AL00A 10.0.0.1(C00E1R1P1). A module may refer to some memory after it has been freed while dealing with some messages. Attackers can exploit this vulnerability by sending specific message to the affected module. This may lead to module crash, compromising normal service.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2021-22304?

It affects 1 product.


Products: Huawei Taurus-Al00a Firmware.

## How do I fix CVE-2021-22304?

No fix has been published for CVE-2021-22304 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-22304 being exploited?

There is no known exploitation of CVE-2021-22304 in the wild and no public exploit code.

## Other vulnerabilities in Taurus-AL00A

- [CVE-2021-22302](https://insights.sbomify.com/CVE-2021-22302/): Memory corruption in Taurus-AL00A (high 7.1)
- [CVE-2020-9093](https://insights.sbomify.com/CVE-2020-9093/): Use after free in Taurus-AL00A (medium 5.5)
- [CVE-2020-9087](https://insights.sbomify.com/CVE-2020-9087/): Information disclosure in Taurus-AL00A (medium 5.5)
- [CVE-2021-22303](https://insights.sbomify.com/CVE-2021-22303/): Use after free in Taurus-AL00A (low 3.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-22304 and fix it if it is affected.

What it is: CVE-2021-22304 is a low-severity use after free vulnerability in Taurus-AL00A, published on 6 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-2021-22304 in the wild and no public exploit code.

Affected product: Taurus-AL00A. 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-2021-22304/ (Markdown: https://insights.sbomify.com/CVE-2021-22304/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-22304
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-22304
- OSV: https://osv.dev/vulnerability/CVE-2021-22304

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-22304/
Summaries are generated and may contain mistakes; the official description above is the record.