# CVE-2024-33659: BiosGuard Buffer Overflow and TOCTOU Vulnerability

> A local attacker can exploit a buffer overflow in AMI AptioV BIOS to execute arbitrary code at System Management Mode level.

- **Severity:** Medium 5.7 (`CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L`)
- **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:** 11 Feb 2025
- **Updated:** 11 Feb 2025
- **Also known as:** GHSA-r8rq-6jrf-gqrw

## What is CVE-2024-33659?

CVE-2024-33659 is a medium-severity memory corruption vulnerability in AMI AptioV, published on 11 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

AMI APTIOV contains a vulnerability in BIOS where an attacker may cause an Improper Input Validation by a local attacker. Successful exploitation of these vulnerabilities may lead to overwriting arbitrary memory and execute arbitrary code at SMM level, also impacting Confidentiality, Integrity, and Availability.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2024-33659?

It affects 1 product.


Products: Ami Aptio V.

## How do I fix CVE-2024-33659?

No fix has been published for CVE-2024-33659 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-33659 being exploited?

There is no known exploitation of CVE-2024-33659 in the wild and no public exploit code.

## Other vulnerabilities in AMI AptioV

- [CVE-2022-40250](https://insights.sbomify.com/CVE-2022-40250/): Stack overflow vulnerability in SMI handler on SmmSmbiosElog. (high 8.8)
- [CVE-2025-33045](https://insights.sbomify.com/CVE-2025-33045/): Legacy Serial Redirection SMRAM Vulnerabilities (high 8.2)
- [CVE-2022-26873](https://insights.sbomify.com/CVE-2022-26873/): Memory corruption in Aptio (high 8.2)
- [CVE-2022-40261](https://insights.sbomify.com/CVE-2022-40261/): SMM memory corruption vulnerability in OverClockSmiHandler SMM driver (high 8.2)
- [CVE-2022-40262](https://insights.sbomify.com/CVE-2022-40262/): The arbitrary write vulnerability in S3Resume2Pei leads to arbitrary code execution during PEI phase. (high 8.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-33659 and fix it if it is affected.

What it is: CVE-2024-33659 is a medium-severity memory corruption vulnerability in AMI AptioV, published on 11 Feb 2025. 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-2024-33659 in the wild and no public exploit code.

Affected product: AMI AptioV. 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-2024-33659/ (Markdown: https://insights.sbomify.com/CVE-2024-33659/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-33659
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-33659
- OSV: https://osv.dev/vulnerability/CVE-2024-33659

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-33659/
Summaries are generated and may contain mistakes; the official description above is the record.