# CVE-2020-14120: Missing authorization in MIUI

> Attackers can exploit missing checksums in Xiaomi MIUI to gain elevated privileges and disrupt system services via malicious apps.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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:** 21 Apr 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-grgj-cvfc-46jg

## What is CVE-2020-14120?

CVE-2020-14120 is a high-severity missing authorization vulnerability in MIUI, published on 21 Apr 2022. 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

Some Xiaomi models have a vulnerability in a certain application. The vulnerability is caused by the lack of checksum when using a three-party application to pass in parameters, and attackers can induce users to install a malicious app and use the vulnerability to achieve elevated privileges, making the normal services of the system affected.

Weakness: CWE-354 (Improper Validation of Integrity Check Value)

## Which versions are affected by CVE-2020-14120?

It affects 1 product.


Products: Mi Miui.

## How do I fix CVE-2020-14120?

No fix has been published for CVE-2020-14120 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-14120 being exploited?

There is no known exploitation of CVE-2020-14120 in the wild and no public exploit code.

## Other vulnerabilities in MIUI

- [CVE-2020-14127](https://insights.sbomify.com/CVE-2020-14127/): Memory corruption in Redmi K40 ,Redmi Note10 Pro (high 7.5)
- [CVE-2020-14125](https://insights.sbomify.com/CVE-2020-14125/): Memory corruption in Redmi Note 11 ,Redmi Note 9T (high 7.5)
- [CVE-2020-14123](https://insights.sbomify.com/CVE-2020-14123/): Use after free in MIUI (high 7.5)
- [CVE-2020-14122](https://insights.sbomify.com/CVE-2020-14122/): Information disclosure in MIUI (medium 5.5)
- [CVE-2020-14105](https://insights.sbomify.com/CVE-2020-14105/): Information disclosure in Xiaomi 10 (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-14120 and fix it if it is affected.

What it is: CVE-2020-14120 is a high-severity missing authorization vulnerability in MIUI, published on 21 Apr 2022. 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-2020-14120 in the wild and no public exploit code.

Affected product: MIUI. 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-2020-14120/ (Markdown: https://insights.sbomify.com/CVE-2020-14120/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-14120
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-14120
- OSV: https://osv.dev/vulnerability/CVE-2020-14120

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-14120/
Summaries are generated and may contain mistakes; the official description above is the record.