# CVE-2016-3320: Security feature bypass in n/a

> Attackers with admin or physical access can bypass Secure Boot by installing a crafted boot manager on Windows systems.

- **Severity:** Medium 4.9 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Aug 2016
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-55gv-2639-x9jq

## What is CVE-2016-3320?

CVE-2016-3320 is a medium-severity vulnerability in Fedoraproject Fedora, published on 9 Aug 2016. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Microsoft Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 allow attackers to bypass the Secure Boot protection mechanism by leveraging (1) administrative or (2) physical access to install a crafted boot manager, aka "Secure Boot Security Feature Bypass."

Weakness: CWE-254

## Which versions are affected by CVE-2016-3320?

It affects 5 products.


Products: Fedoraproject Fedora, Microsoft Windows 10, Microsoft Windows 8.1, Microsoft Windows Rt 8.1, Microsoft Windows Server 2012.

## How do I fix CVE-2016-3320?

No fix has been published for CVE-2016-3320 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-3320 being exploited?

There is no known exploitation of CVE-2016-3320 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-3320 and fix it if it is affected.

What it is: CVE-2016-3320 is a medium-severity vulnerability in Fedoraproject Fedora, published on 9 Aug 2016. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2016-3320 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2016-3320/ (Markdown: https://insights.sbomify.com/CVE-2016-3320/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-3320
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-3320
- OSV: https://osv.dev/vulnerability/CVE-2016-3320

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-3320/
Summaries are generated and may contain mistakes; the official description above is the record.