# CVE-2022-3431: Security feature bypass in BIOS

> An attacker with elevated privileges can bypass Secure Boot by modifying NVRAM variables via a manufacturing driver left active in Lenovo BIOS.

- **Severity:** Medium 6.7 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Oct 2023
- **Updated:** 19 Sep 2024
- **Also known as:** GHSA-jgmr-c4c9-rqmx

## What is CVE-2022-3431?

CVE-2022-3431 is a medium-severity vulnerability in Lenovo BIOS, published on 9 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A potential vulnerability in a driver used during manufacturing process on some consumer Lenovo Notebook devices that was mistakenly not deactivated may allow an attacker with elevated privileges to modify secure boot setting by modifying an NVRAM variable.

Weakness: CWE-276 (Incorrect Default Permissions)

## Which versions are affected by CVE-2022-3431?

It affects 25 products.


Products: Lenovo D330-10igl Firmware, Lenovo Ideapad 5 Pro-16ach6 Firmware, Lenovo Ideapad 5 Pro-16ihu6 Firmware, Lenovo Ideapad 5 Pro 16arh7 Firmware, Lenovo Ideapad Creator 5-16ach6 Firmware, Lenovo Ideapad Duet 3 10igl5 Firmware, Lenovo Ideapad Slim 7 Pro 16ach6 Firmware, Lenovo S540-15iml Firmware, Lenovo Slim 7 16arh7 Firmware, Lenovo Thinkbook 13x Itg Firmware, Lenovo Thinkbook 14 G4\+ Ara Firmware, Lenovo Thinkbook 14 G4\+ Iap Firmware, Lenovo Thinkbook 16 G4\+ Ara Firmware, Lenovo Thinkbook 16 G4\+ Iap Firmware, Lenovo Thinkbook 16p Nx Arh Firmware, Lenovo Thinkbook Plus G2 Itg Firmware, Lenovo Thinkbook Plus G3 Iap Firmware, Lenovo Yoga Duet 7-13iml05 Firmware, Lenovo Yoga Duet 7-13itl6-Lte Firmware, Lenovo Yoga Duet 7-13itl6 Firmware and 5 more.

## How do I fix CVE-2022-3431?

No fix has been published for CVE-2022-3431 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-3431 being exploited?

There is no known exploitation of CVE-2022-3431 in the wild and no public exploit code.

## Other vulnerabilities in Lenovo BIOS

- [CVE-2022-3430](https://insights.sbomify.com/CVE-2022-3430/): Security feature bypass in BIOS (medium 6.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-3431 and fix it if it is affected.

What it is: CVE-2022-3431 is a medium-severity vulnerability in Lenovo BIOS, published on 9 Oct 2023. 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-2022-3431 in the wild and no public exploit code.

Affected product: Lenovo BIOS. 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-2022-3431/ (Markdown: https://insights.sbomify.com/CVE-2022-3431/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-3431
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-3431
- OSV: https://osv.dev/vulnerability/CVE-2022-3431

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-3431/
Summaries are generated and may contain mistakes; the official description above is the record.