# CVE-2020-11500: Weak cryptography in n/a

> Zoom Client uses weak AES-ECB encryption with a shared key, allowing attackers to potentially decrypt meeting audio and video streams.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/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:** No
- **Published:** 3 Apr 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-wcgv-3rx6-w6f9

## What is CVE-2020-11500?

CVE-2020-11500 is a high-severity vulnerability in n/a, published on 3 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Zoom Client for Meetings through 4.6.9 uses the ECB mode of AES for video and audio encryption. Within a meeting, all participants use a single 128-bit key.

Weakness: CWE-327 (Use of a Broken or Risky Cryptographic Algorithm)

## Which versions are affected by CVE-2020-11500?

It affects 1 product.


Products: Zoom Meetings.

## How do I fix CVE-2020-11500?

No fix has been published for CVE-2020-11500 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-11500 being exploited?

There is no known exploitation of CVE-2020-11500 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-33907](https://insights.sbomify.com/CVE-2021-33907/): Code injection in Zoom Client for Meetings for Windows (critical 9.8)
- [CVE-2022-28768](https://insights.sbomify.com/CVE-2022-28768/): Local Privilege Escalation in Zoom Client Installer for macOS (high 8.8)
- [CVE-2022-28763](https://insights.sbomify.com/CVE-2022-28763/): Improper URL parsing in Zoom Clients (high 8.8)
- [CVE-2022-28757](https://insights.sbomify.com/CVE-2022-28757/): Local Privilege Escalation in Auto Updater for Zoom Client for Meetings for macOS (high 8.8)
- [CVE-2022-28751](https://insights.sbomify.com/CVE-2022-28751/): Local Privilege Escalation in Zoom Client for Meetings for MacOS (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-11500 and fix it if it is affected.

What it is: CVE-2020-11500 is a high-severity vulnerability in n/a, published on 3 Apr 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-2020-11500 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-2020-11500/ (Markdown: https://insights.sbomify.com/CVE-2020-11500/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-11500
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-11500
- OSV: https://osv.dev/vulnerability/CVE-2020-11500

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-11500/
Summaries are generated and may contain mistakes; the official description above is the record.