# CVE-2020-8323: Code injection in BIOS

> A vulnerability in the Lenovo BIOS Legacy SD driver allows arbitrary code execution via a flawed SMI callback function.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:L/AC:H/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 Jun 2020
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-55j2-pfhw-fwf3

## What is CVE-2020-8323?

CVE-2020-8323 is a medium-severity code injection vulnerability in Lenovo BIOS, published on 9 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A potential vulnerability in the SMI callback function used in the Legacy SD driver in some Lenovo ThinkPad, ThinkStation, and Lenovo Notebook models may allow arbitrary code execution.

## Which versions are affected by CVE-2020-8323?

It affects 172 products.


Products: Lenovo 14iwl Firmware, Lenovo 330-14ast Firmware, Lenovo 330-15ast Firmware, Lenovo 330-17ast Firmware, Lenovo 340c-15api Firmware, Lenovo 340c-15ast Firmware, Lenovo 6 Pro-13-Iwl Firmware, Lenovo 6 Pro-14-Iwl Firmware, Lenovo 720s-15ikb Firmware, Lenovo 720s Touch-15ikb Firmware, Lenovo 730s-13iwl Firmware, Lenovo C640-Iml Firmware, Lenovo E42-80 Firmware, Lenovo E52-80 Firmware, Lenovo E53-80 Firmware, Lenovo K22-80 Firmware, Lenovo K32-80 Kbl Firmware, Lenovo K32-80 Skl Firmware, Lenovo K3 Firmware, Lenovo K4-Iwl Firmware and 152 more.

## How do I fix CVE-2020-8323?

No fix has been published for CVE-2020-8323 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-8323 being exploited?

There is no known exploitation of CVE-2020-8323 in the wild and no public exploit code.

## Other vulnerabilities in Lenovo BIOS

- [CVE-2020-8322](https://insights.sbomify.com/CVE-2020-8322/): Code injection in BIOS (medium 6.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-8323 and fix it if it is affected.

What it is: CVE-2020-8323 is a medium-severity code injection vulnerability in Lenovo BIOS, published on 9 Jun 2020. 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-2020-8323 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-2020-8323/ (Markdown: https://insights.sbomify.com/CVE-2020-8323/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8323
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8323
- OSV: https://osv.dev/vulnerability/CVE-2020-8323

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-8323/
Summaries are generated and may contain mistakes; the official description above is the record.