# CVE-2018-7939: Security feature bypass in G9 Lite, Honor 5A, Honor 6X, Honor 8

> Attackers can bypass Factory Reset Protection on Huawei smartphones by enabling TalkBack during setup, allowing unauthorized device access.

- **Severity:** Medium 4.6 (`CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Sep 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-6gm6-9xjg-j4p8

## What is CVE-2018-7939?

CVE-2018-7939 is a medium-severity vulnerability in Huawei Technologies Co., Ltd. G9 Lite, Honor 5A, Honor 6X, Honor 8, published on 12 Sep 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Huawei smart phones G9 Lite, Honor 5A, Honor 6X, Honor 8 with the versions before VNS-L53C605B120CUSTC605D103, the versions before CAM-L03C605B143CUSTC605D008, the versions before CAM-L21C10B145, the versions before CAM-L21C185B156, the versions before CAM-L21C223B133, the versions before CAM-L21C432B210, the versions before CAM-L21C464B170, the versions before CAM-L21C636B245, the versions before Berlin-L21C10B372, the versions before Berlin-L21C185B363, the versions before Berlin-L21C464B137, the versions before Berlin-L23C605B161, the versions before FRD-L09C10B387, the versions before FRD-L09C185B387, the versions before FRD-L09C432B398, the versions before FRD-L09C636B387, the versions before FRD-L19C10B387, the versions before FRD-L19C432B399, the versions before FRD-L19C636B387 have a Factory Reset Protection (FRP) bypass security vulnerability. When re-configuring the mobile phone using the factory reset protection (FRP) function, an attacker can disable the boot wizard by enable the talkback function. As a result, the FRP function is bypassed.

## Which versions are affected by CVE-2018-7939?

It affects 5 products.


Products: Huawei G9 Lite Firmware, Huawei Honor 5a, Huawei Honor 5a Firmware, Huawei Honor 6x Firmware, Huawei Honor 8 Firmware.

## How do I fix CVE-2018-7939?

No fix has been published for CVE-2018-7939 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-7939 being exploited?

There is no known exploitation of CVE-2018-7939 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-7939 and fix it if it is affected.

What it is: CVE-2018-7939 is a medium-severity vulnerability in Huawei Technologies Co., Ltd. G9 Lite, Honor 5A, Honor 6X, Honor 8, published on 12 Sep 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-7939 in the wild and no public exploit code.

Affected product: Huawei Technologies Co., Ltd. G9 Lite, Honor 5A, Honor 6X, Honor 8. 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-2018-7939/ (Markdown: https://insights.sbomify.com/CVE-2018-7939/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-7939
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-7939
- OSV: https://osv.dev/vulnerability/CVE-2018-7939

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-7939/
Summaries are generated and may contain mistakes; the official description above is the record.