# CVE-2020-9142: Memory corruption in EMUI;Magic UI

> Heap buffer overflow in Huawei smartphone OS allows attackers to overwrite memory and potentially execute code via malicious update files.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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:** 13 Jan 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-w82f-48jf-c4v4

## What is CVE-2020-9142?

CVE-2020-9142 is a critical memory corruption vulnerability in Huawei Emui, published on 13 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

There is a heap base buffer overflow vulnerability in some Huawei smartphone.Successful exploitation of this vulnerability can cause heap overflow and memory overwriting when the system incorrectly processes the update file.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2020-9142?

It affects 2 products.


Products: Huawei Emui, Huawei Magic Ui.

## How do I fix CVE-2020-9142?

No fix has been published for CVE-2020-9142 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-9142 being exploited?

There is no known exploitation of CVE-2020-9142 in the wild and no public exploit code.

## Other vulnerabilities in Huawei Emui

- [CVE-2023-52370](https://insights.sbomify.com/CVE-2023-52370/): Memory corruption in EMUI (critical 9.8)
- [CVE-2023-52378](https://insights.sbomify.com/CVE-2023-52378/): Business logic in EMUI (critical 9.8)
- [CVE-2023-52381](https://insights.sbomify.com/CVE-2023-52381/): Code injection in EMUI (critical 9.8)
- [CVE-2023-52103](https://insights.sbomify.com/CVE-2023-52103/): Memory corruption in EMUI (critical 9.8)
- [CVE-2023-46773](https://insights.sbomify.com/CVE-2023-46773/): Privilege escalation in EMUI (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-9142 and fix it if it is affected.

What it is: CVE-2020-9142 is a critical memory corruption vulnerability in Huawei Emui, published on 13 Jan 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-2020-9142 in the wild and no public exploit code.

Affected product: Huawei Emui. 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-2020-9142/ (Markdown: https://insights.sbomify.com/CVE-2020-9142/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-9142
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-9142
- OSV: https://osv.dev/vulnerability/CVE-2020-9142

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-9142/
Summaries are generated and may contain mistakes; the official description above is the record.