# CVE-2020-10941: Information disclosure in n/a

> Attackers can extract RSA private keys from Mbed TLS by measuring cache usage during key import operations.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 24 Mar 2020
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2020-10941, GHSA-3qrr-m24q-j9qm, JLSEC-2025-200, UBUNTU-CVE-2020-10941

## What is CVE-2020-10941?

CVE-2020-10941 is a medium-severity vulnerability in Arm Mbed Tls, published on 24 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Arm Mbed TLS before 2.16.5 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.

## Which versions are affected by CVE-2020-10941?

It affects 4 products.


Products: Arm Mbed Crypto, Arm Mbed Tls, Debian Debian Linux, Fedoraproject Fedora.

## How do I fix CVE-2020-10941?

Upgrade to a fixed version.

## Is CVE-2020-10941 being exploited?

There is no known exploitation of CVE-2020-10941 in the wild and no public exploit code.

## Other vulnerabilities in Arm Mbed Tls

- [CVE-2024-28960](https://insights.sbomify.com/CVE-2024-28960/): Other in n/a (high 8.2)
- [CVE-2019-16910](https://insights.sbomify.com/CVE-2019-16910/): Weak cryptography in n/a (medium 5.3)
- [CVE-2019-18222](https://insights.sbomify.com/CVE-2019-18222/): Information disclosure in n/a (medium 4.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-10941 and fix it if it is affected.

What it is: CVE-2020-10941 is a medium-severity vulnerability in Arm Mbed Tls, published on 24 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-10941 in the wild and no public exploit code.

Affected product: Arm Mbed Tls. 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-2020-10941/ (Markdown: https://insights.sbomify.com/CVE-2020-10941/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-10941
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-10941
- OSV: https://osv.dev/vulnerability/CVE-2020-10941

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-10941/
Summaries are generated and may contain mistakes; the official description above is the record.