# CVE-2021-31532: Security feature bypass in n/a

> An undocumented ROM patch peripheral in NXP microcontrollers allows attackers to modify internal ROM, bypassing security features and executing arbitrary code.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:P/AC:L/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:** 6 May 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-236w-64qf-jjqf

## What is CVE-2021-31532?

CVE-2021-31532 is a medium-severity vulnerability in n/a, published on 6 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

NXP LPC55S6x microcontrollers (0A and 1B), i.MX RT500 (silicon rev B1 and B2), i.MX RT600 (silicon rev A0, B0), LPC55S6x, LPC55S2x, LPC552x (silicon rev 0A, 1B), LPC55S1x, LPC551x (silicon rev 0A) and LPC55S0x, LPC550x (silicon rev 0A) include an undocumented ROM patch peripheral that allows unsigned, non-persistent modification of the internal ROM.

## Which versions are affected by CVE-2021-31532?

It affects 24 products.


Products: Nxp I.mx Rt500 Firmware, Nxp I.mx Rt600 Firmware, Nxp Lpc5512jbd100 Firmware, Nxp Lpc5512jbd64 Firmware, Nxp Lpc5514jbd100 Firmware, Nxp Lpc5514jbd64 Firmware, Nxp Lpc5516jbd100 Firmware, Nxp Lpc5516jbd64 Firmware, Nxp Lpc5516jev98 Firmware, Nxp Lpc5526 Firmware, Nxp Lpc5528 Firmware, Nxp Lpc55s14jbd100 Firmware, Nxp Lpc55s14jbd64 Firmware, Nxp Lpc55s16jbd100 Firmware, Nxp Lpc55s16jbd64 Firmware, Nxp Lpc55s16jev98 Firmware, Nxp Lpc55s26 Firmware, Nxp Lpc55s28 Firmware, Nxp Lpc55s66jbd100 Firmware, Nxp Lpc55s69jbd100 Firmware and 4 more.

## How do I fix CVE-2021-31532?

No fix has been published for CVE-2021-31532 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-31532 being exploited?

There is no known exploitation of CVE-2021-31532 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-31532 and fix it if it is affected.

What it is: CVE-2021-31532 is a medium-severity vulnerability in n/a, published on 6 May 2021. 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-2021-31532 in the wild and no public exploit code.

Affected product: n/a. 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-2021-31532/ (Markdown: https://insights.sbomify.com/CVE-2021-31532/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-31532
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-31532
- OSV: https://osv.dev/vulnerability/CVE-2021-31532

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-31532/
Summaries are generated and may contain mistakes; the official description above is the record.