# CVE-2020-13799: Security feature bypass in n/a

> Attackers can manipulate Replay Protected Memory Block state in eMMC, UFS, and NVMe storage devices, bypassing security mechanisms intended to protect trusted firmware.

- **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:** 18 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-w82c-75f7-qr29

## What is CVE-2020-13799?

CVE-2020-13799 is a medium-severity vulnerability in n/a, published on 18 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Western Digital has identified a security vulnerability in the Replay Protected Memory Block (RPMB) protocol as specified in multiple standards for storage device interfaces, including all versions of eMMC, UFS, and NVMe. The RPMB protocol is specified by industry standards bodies and is implemented by storage devices from multiple vendors to assist host systems in securing trusted firmware. Several scenarios have been identified in which the RPMB state may be affected by an attacker without the knowledge of the trusted component that uses the RPMB feature.

Weakness: CWE-294 (Authentication Bypass by Capture-replay)

## Which versions are affected by CVE-2020-13799?

It affects 4 products.


Products: Trustedfirmware Op-Tee, Westerndigital Inand Cl Em132 Firmware, Westerndigital Inand Ix Em132 Firmware, Westerndigital Inand Ix Em132 Xi Firmware.

## How do I fix CVE-2020-13799?

No fix has been published for CVE-2020-13799 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-13799 being exploited?

There is no known exploitation of CVE-2020-13799 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-1010292](https://insights.sbomify.com/CVE-2019-1010292/): Memory corruption in OP-TEE (critical 9.8)
- [CVE-2019-1010293](https://insights.sbomify.com/CVE-2019-1010293/): Memory corruption in OP-TEE (critical 9.8)
- [CVE-2019-1010295](https://insights.sbomify.com/CVE-2019-1010295/): Linaro/OP-TEE OP-TEE 3.3.0 and earlier is affected by: Buffer Overflow. (critical 9.8)
- [CVE-2019-1010296](https://insights.sbomify.com/CVE-2019-1010296/): Memory corruption in OP-TEE (critical 9.8)
- [CVE-2019-1010297](https://insights.sbomify.com/CVE-2019-1010297/): Memory corruption in OP-TEE (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-13799 and fix it if it is affected.

What it is: CVE-2020-13799 is a medium-severity vulnerability in n/a, published on 18 Nov 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-2020-13799 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-2020-13799/ (Markdown: https://insights.sbomify.com/CVE-2020-13799/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-13799
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-13799
- OSV: https://osv.dev/vulnerability/CVE-2020-13799

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-13799/
Summaries are generated and may contain mistakes; the official description above is the record.