# CVE-2018-7906: Denial of service in Leland-AL00, Leland-AL00A

> Attackers can cause a black screen denial of service on Huawei smartphones by tricking users into installing malicious applications due to insufficient parameter verification.

- **Severity:** Medium 5.5 (`CVSS:3.0/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:** 12 Sep 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-f8cw-q938-qj7r

## What is CVE-2018-7906?

CVE-2018-7906 is a medium-severity denial of service vulnerability in Huawei Technologies Co., Ltd. Leland-AL00, Leland-AL00A, published on 12 Sep 2018. 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

Some Huawei smart phones with software of Leland-AL00 8.0.0.114(C636), Leland-AL00A 8.0.0.171(C00) have a denial of service (DoS) vulnerability. An attacker can trick a user to install a malicious application to exploit this vulnerability. Due to insufficient verification of the parameter, successful exploitation can cause the smartphone black screen until restarting the phone.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2018-7906?

It affects 2 products.


Products: Huawei Leland-Al00 Firmware, Huawei Lleland-Al00a Firmware.

## How do I fix CVE-2018-7906?

No fix has been published for CVE-2018-7906 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-7906 being exploited?

There is no known exploitation of CVE-2018-7906 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-7906 and fix it if it is affected.

What it is: CVE-2018-7906 is a medium-severity denial of service vulnerability in Huawei Technologies Co., Ltd. Leland-AL00, Leland-AL00A, published on 12 Sep 2018. 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-2018-7906 in the wild and no public exploit code.

Affected product: Huawei Technologies Co., Ltd. Leland-AL00, Leland-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-2018-7906/ (Markdown: https://insights.sbomify.com/CVE-2018-7906/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-7906
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-7906
- OSV: https://osv.dev/vulnerability/CVE-2018-7906

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-7906/
Summaries are generated and may contain mistakes; the official description above is the record.