# CVE-2017-3775: Security feature bypass in Some Lenovo Flex System and Lenovo System x products

> Attackers with physical access can bypass Secure Boot to execute unsigned code on Lenovo System x servers.

- **Severity:** Medium 6.4 (`CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 4 May 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-m3r2-464w-g5x4

## What is CVE-2017-3775?

CVE-2017-3775 is a medium-severity vulnerability in Some Lenovo Flex System and Lenovo System x products, published on 4 May 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Some Lenovo System x server BIOS/UEFI versions, when Secure Boot mode is enabled by a system administrator, do not properly authenticate signed code before booting it. As a result, an attacker with physical access to the system could boot unsigned code.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2017-3775?

It affects 11 products.


Products: Lenovo Flex System X240 M5 Bios, Lenovo Flex System X280 X6 Bios, Lenovo Flex System X480 X6 Bios, Lenovo Flex System X880 Bios, Lenovo Nextscale Nx360 M5 Bios, Lenovo System X3250 M6 Bios, Lenovo System X3500 M5 Bios, Lenovo System X3550 M5 Bios, Lenovo System X3650 M5 Bios, Lenovo System X3850 X6 Bios, Lenovo System X3950 X6 Bios.

## How do I fix CVE-2017-3775?

No fix has been published for CVE-2017-3775 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-3775 being exploited?

There is no known exploitation of CVE-2017-3775 in the wild and no public exploit code.

## Other vulnerabilities in Some Lenovo Flex System and Lenovo System x products

- [CVE-2016-8226](https://insights.sbomify.com/CVE-2016-8226/): Denial of service in System X M5, M6, and X6 BIOS (medium 4.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-3775 and fix it if it is affected.

What it is: CVE-2017-3775 is a medium-severity vulnerability in Some Lenovo Flex System and Lenovo System x products, published on 4 May 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-2017-3775 in the wild and no public exploit code.

Affected product: Some Lenovo Flex System and Lenovo System x products. 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-2017-3775/ (Markdown: https://insights.sbomify.com/CVE-2017-3775/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-3775
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-3775
- OSV: https://osv.dev/vulnerability/CVE-2017-3775

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-3775/
Summaries are generated and may contain mistakes; the official description above is the record.