# MA-1237.012025: MyCERT Advisory - Cisco BroadWorks SIP Denial of Service Vulnerability

**Date:** 31 Jan 2025  
**Source:** https://www.mycert.org.my/portal/advisory?id=MA-1237.012025  
**Advisory ID:** MA-1237.012025

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**1.0 Introduction**
Recently, Cisco has released a high-severity vulnerability in Cisco BroadWorks, affecting its SIP (Session Initiation Protocol) processing subsystem.
**2.0 Impact**
This vulnerability allows unauthenticated, remote attackers to send a high volume of specially crafted SIP requests that could exhaust system memory on the affected servers, causing a Denial of Service (DoS) condition.
**3.0 Affected Products**
- Cisco BroadWorks (all configurations)
**4.0 Recommendations**
CyberSecurity Malaysia encourages users and administrators to review the following advisories and apply the necessary updates:
Kindly, please refer to the URL below:  <https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bw-sip-dos-mSySbrmt>
For updates addressing lower severity vulnerabilities, see the [Cisco Security Advisories](https://sec.cloudapps.cisco.com/security/center/publicationListing.x) page.
Generally, Cyber999 advises the users of these devices to be updated with the latest security announcements by the vendor and follow best practice security policies to determine which updates should be applied.
For further enquiries, please contact us through the following channels:
E-mail: cyber999[at]cybersecurity.my 
Phone: 1-300-88-2999 (monitored during business hours) 
Mobile: +60 19 2665850 (24x7 call incident reporting) 
Business Hours: Mon - Fri 08:30 -17:30 MYT 
Web: [https://www.mycert.org.my](https://www.mycert.org.my/) 
**5.0    References**
- <https://sec.cloudapps.cisco.com/security/center/publicationListing.x>
- <https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bw-sip-dos-mSySbrmt>