# CVE-2020-9093: Use after free in Taurus-AL00A

> Attackers can cause denial of service in Huawei Taurus-AL00A by exploiting a use-after-free vulnerability via a crafted application.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 29 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-6496-p2qf-5gj8

## What is CVE-2020-9093?

CVE-2020-9093 is a medium-severity use after free vulnerability in Huawei Taurus-AL00A, published on 29 Dec 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

There is a use after free vulnerability in Taurus-AL00A versions 10.0.0.1(C00E1R1P1). A module does not deal with specific message properly, which makes a function refer to memory after it has been freed. Attackers can exploit this vulnerability by running a crafted application with common privilege. This would compromise normal service.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2020-9093?

It affects 1 product.


Products: Huawei Taurus-Al00a Firmware.

## How do I fix CVE-2020-9093?

No fix has been published for CVE-2020-9093 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-9093 being exploited?

There is no known exploitation of CVE-2020-9093 in the wild and no public exploit code.

## Other vulnerabilities in Huawei Taurus-AL00A

- [CVE-2021-22302](https://insights.sbomify.com/CVE-2021-22302/): Memory corruption in Taurus-AL00A (high 7.1)
- [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)
- [CVE-2021-22304](https://insights.sbomify.com/CVE-2021-22304/): Use after free in Taurus-AL00A (low 3.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-9093 and fix it if it is affected.

What it is: CVE-2020-9093 is a medium-severity use after free vulnerability in Huawei Taurus-AL00A, published on 29 Dec 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-9093 in the wild and no public exploit code.

Affected product: Huawei 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-2020-9093/ (Markdown: https://insights.sbomify.com/CVE-2020-9093/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-9093
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-9093
- OSV: https://osv.dev/vulnerability/CVE-2020-9093

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-9093/
Summaries are generated and may contain mistakes; the official description above is the record.