# CVE-2020-9256: Missing authorization in Mate 30 Pro

> A malicious application can cause a denial of audio service on Huawei Mate 30 Pro devices due to improper system service authorization.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 17 Jul 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-3p77-prh6-2vh7

## What is CVE-2020-9256?

CVE-2020-9256 is a medium-severity missing authorization vulnerability in Huawei Mate 30 Pro, published on 17 Jul 2020. 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

Huawei Mate 30 Pro smartphones with versions earlier than 10.1.0.150(C00E136R5P3) have an improper authorization vulnerability. The system does not properly restrict the use of system service by applications, the attacker should trick the user into installing a malicious application, successful exploit could cause a denial of audio service.

## Which versions are affected by CVE-2020-9256?

It affects 1 product.


Products: Huawei Mate 30 Pro Firmware.

## How do I fix CVE-2020-9256?

No fix has been published for CVE-2020-9256 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-9256 being exploited?

There is no known exploitation of CVE-2020-9256 in the wild and no public exploit code.

## Other vulnerabilities in Huawei Mate 30 Pro

- [CVE-2020-1838](https://insights.sbomify.com/CVE-2020-1838/): Auth bypass in HUAWEI Mate 30 Pro (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-9256 and fix it if it is affected.

What it is: CVE-2020-9256 is a medium-severity missing authorization vulnerability in Huawei Mate 30 Pro, published on 17 Jul 2020. 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-2020-9256 in the wild and no public exploit code.

Affected product: Huawei Mate 30 Pro. 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-2020-9256/ (Markdown: https://insights.sbomify.com/CVE-2020-9256/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-9256
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-9256
- OSV: https://osv.dev/vulnerability/CVE-2020-9256

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-9256/
Summaries are generated and may contain mistakes; the official description above is the record.