# CVE-2017-3748: Privilege escalation in Lenovo Vibe and Lenovo China-only Moto Mobile Phones

> Attackers can exploit improper access controls in the nac_server component to elevate privileges to root on Lenovo Vibe devices.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Jun 2017
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-g7gx-c2jg-7cg5

## What is CVE-2017-3748?

CVE-2017-3748 is a high-severity vulnerability in Google Android, published on 29 Jun 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

On Lenovo VIBE mobile phones, improper access controls on the nac_server component can be abused in conjunction with CVE-2017-3749 and CVE-2017-3750 to elevate privileges to the root user (commonly known as 'rooting' or "jail breaking" a device).

## Which versions are affected by CVE-2017-3748?

It affects 1 product.


Products: Google Android.

## How do I fix CVE-2017-3748?

No fix has been published for CVE-2017-3748 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-3748 being exploited?

There is no known exploitation of CVE-2017-3748 in the wild and no public exploit code.

## Other vulnerabilities in Google Android

- [CVE-2026-58704](https://insights.sbomify.com/CVE-2026-58704/): Google Pixel Improper Authorization (high 8.8, exploited in the wild)
- [CVE-2025-48543](https://insights.sbomify.com/CVE-2025-48543/): Android Runtime Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2023-35674](https://insights.sbomify.com/CVE-2023-35674/): Android Framework Privilege Escalation (high 8.8, exploited in the wild)
- [CVE-2025-48595](https://insights.sbomify.com/CVE-2025-48595/): Android Framework Integer Overflow (high 8.4, exploited in the wild)
- [CVE-2024-32896](https://insights.sbomify.com/CVE-2024-32896/): Android Pixel Privilege Escalation (high 8.1, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-3748 and fix it if it is affected.

What it is: CVE-2017-3748 is a high-severity vulnerability in Google Android, published on 29 Jun 2017. 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-2017-3748 in the wild and no public exploit code.

Affected product: Google Android. 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-2017-3748/ (Markdown: https://insights.sbomify.com/CVE-2017-3748/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-3748
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-3748
- OSV: https://osv.dev/vulnerability/CVE-2017-3748

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-3748/
Summaries are generated and may contain mistakes; the official description above is the record.