# CVE-2023-20584: Security feature bypass in AMD EPYC™ 7003 Processors

> A compromised hypervisor can bypass SEV-SNP integrity checks via IOMMU faults, allowing guest memory modification on AMD EPYC processors.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 Aug 2024
- **Updated:** 5 Nov 2024
- **Also known as:** DEBIAN-CVE-2023-20584, GHSA-7cfh-j5pv-fw3c, UBUNTU-CVE-2023-20584

## What is CVE-2023-20584?

CVE-2023-20584 is a medium-severity vulnerability in Amd Epyc 72f3 Firmware, published on 13 Aug 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

IOMMU improperly handles certain special address
ranges with invalid device table entries (DTEs), which may allow an attacker
with privileges and a compromised Hypervisor to
induce DTE faults to bypass RMP checks in SEV-SNP, potentially leading to a
loss of guest integrity.

## Which versions are affected by CVE-2023-20584?

It affects 65 products.


Products: Amd Epyc 7203 Firmware, Amd Epyc 7203p Firmware, Amd Epyc 72f3 Firmware, Amd Epyc 7303 Firmware, Amd Epyc 7303p Firmware, Amd Epyc 7313 Firmware, Amd Epyc 7313p Firmware, Amd Epyc 7343 Firmware, Amd Epyc 7373x Firmware, Amd Epyc 73f3 Firmware, Amd Epyc 7413 Firmware, Amd Epyc 7443 Firmware, Amd Epyc 7443p Firmware, Amd Epyc 7453 Firmware, Amd Epyc 7473x Firmware, Amd Epyc 74f3 Firmware, Amd Epyc 7513 Firmware, Amd Epyc 7543 Firmware, Amd Epyc 7543p Firmware, Amd Epyc 7573x Firmware and 45 more.

## How do I fix CVE-2023-20584?

Apply the vendor's patch.

## Is CVE-2023-20584 being exploited?

There is no known exploitation of CVE-2023-20584 in the wild and no public exploit code.

## Other vulnerabilities in Amd Epyc 72f3 Firmware

- [CVE-2024-21980](https://insights.sbomify.com/CVE-2024-21980/): Memory corruption in 3rd Gen AMD EPYC™ Processors (high 7.9)
- [CVE-2023-20591](https://insights.sbomify.com/CVE-2023-20591/): Other in AMD EPYC™ 7003 Series Processors (medium 6.5)
- [CVE-2023-20533](https://insights.sbomify.com/CVE-2023-20533/): Denial of service in 2nd Gen AMD EPYC™ Processors (medium 6.1)
- [CVE-2023-31355](https://insights.sbomify.com/CVE-2023-31355/): Memory corruption in 3rd Gen AMD EPYC™ Processors (medium 6.0)
- [CVE-2024-21978](https://insights.sbomify.com/CVE-2024-21978/): Information disclosure in 3rd Gen AMD EPYC™ Processors (medium 6.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-20584 and fix it if it is affected.

What it is: CVE-2023-20584 is a medium-severity vulnerability in Amd Epyc 72f3 Firmware, published on 13 Aug 2024. 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-2023-20584 in the wild and no public exploit code.

Affected product: Amd Epyc 72f3 Firmware. 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-2023-20584/ (Markdown: https://insights.sbomify.com/CVE-2023-20584/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-20584
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-20584
- OSV: https://osv.dev/vulnerability/CVE-2023-20584

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-20584/
Summaries are generated and may contain mistakes; the official description above is the record.