# CVE-2019-5478: Security feature bypass in Zynq UltraScale+ SoC

> An attacker can modify boot image control fields in Encrypt Only mode to bypass secure boot verification on Zynq UltraScale+ devices.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Sep 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-mj5p-5fc7-225v

## What is CVE-2019-5478?

CVE-2019-5478 is a medium-severity vulnerability in Zynq UltraScale+ SoC, published on 3 Sep 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A weakness was found in Encrypt Only boot mode in Zynq UltraScale+ devices. This could lead to an adversary being able to modify the control fields of the boot image leading to an incorrect secure boot behavior.

Weakness: CWE-345 (Insufficient Verification of Data Authenticity), CWE-657 (Violation of Secure Design Principles)

## Which versions are affected by CVE-2019-5478?

It affects 41 products.


Products: Amd Zu11eg Firmware, Amd Zu15eg Firmware, Amd Zu17eg Firmware, Amd Zu19eg Firmware, Amd Zu1cg Firmware, Amd Zu1eg Firmware, Amd Zu21dr Firmware, Amd Zu25dr Firmware, Amd Zu27dr Firmware, Amd Zu28dr Firmware, Amd Zu29dr Firmware, Amd Zu2cg Firmware, Amd Zu2eg Firmware, Amd Zu39dr Firmware, Amd Zu3cg Firmware, Amd Zu3eg Firmware, Amd Zu3tcg Firmware, Amd Zu3teg Firmware, Amd Zu42dr Firmware, Amd Zu43dr Firmware and 21 more.

## How do I fix CVE-2019-5478?

No fix has been published for CVE-2019-5478 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-5478 being exploited?

There is no known exploitation of CVE-2019-5478 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-5478 and fix it if it is affected.

What it is: CVE-2019-5478 is a medium-severity vulnerability in Zynq UltraScale+ SoC, published on 3 Sep 2019. 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-2019-5478 in the wild and no public exploit code.

Affected product: Zynq UltraScale+ SoC. 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-2019-5478/ (Markdown: https://insights.sbomify.com/CVE-2019-5478/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-5478
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-5478
- OSV: https://osv.dev/vulnerability/CVE-2019-5478

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-5478/
Summaries are generated and may contain mistakes; the official description above is the record.