# CVE-2020-3321: Cisco Webex Network Recording Player and Cisco Webex Player Denial of Service Vulnerability

> An attacker can cause a denial of service in Cisco Webex Player by tricking a user into opening a malicious recording file.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 3 Jun 2020
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-8365-p8mj-x9vj

## What is CVE-2020-3321?

CVE-2020-3321 is a low-severity denial of service vulnerability in Cisco Webex Network Recording Player, published on 3 Jun 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A vulnerability in Cisco Webex Network Recording Player and Cisco Webex Player for Microsoft Windows could allow an attacker to cause a process crash resulting in a Denial of service (DoS) condition for the player application on an affected system. The vulnerability exists due to insufficient validation of certain elements with a Webex recording stored in either the Advanced Recording Format (ARF) or the Webex Recording Format (WRF). An attacker could exploit this vulnerability by sending a user a malicious ARF or WRF file through a link or email attachment and persuading the user to open the file with the affected software on the local system. A successful exploit could allow the attacker to cause the Webex player application to crash when trying to view the malicious file.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2020-3321?

It affects 2 products.


Products: Cisco Webex Network Recording Player, Cisco Webex Player.

## How do I fix CVE-2020-3321?

No fix has been published for CVE-2020-3321 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3321 being exploited?

There is no known exploitation of CVE-2020-3321 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Webex Network Recording Player

- [CVE-2020-3319](https://insights.sbomify.com/CVE-2020-3319/): Cisco Webex Network Recording Player and Cisco Webex Player Denial of Service Vulnerability (low 3.3)
- [CVE-2020-3322](https://insights.sbomify.com/CVE-2020-3322/): Cisco Webex Network Recording Player and Cisco Webex Player Denial of Service Vulnerability (low 3.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3321 and fix it if it is affected.

What it is: CVE-2020-3321 is a low-severity denial of service vulnerability in Cisco Webex Network Recording Player, published on 3 Jun 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-3321 in the wild and no public exploit code.

Affected product: Cisco Webex Network Recording Player. 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-2020-3321/ (Markdown: https://insights.sbomify.com/CVE-2020-3321/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3321
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3321
- OSV: https://osv.dev/vulnerability/CVE-2020-3321

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-3321/
Summaries are generated and may contain mistakes; the official description above is the record.