CVE-2025-20165: Cisco BroadWorks SIP Denial of Service Vulnerability
First published: Wed Jan 22 2025(Updated: )
A vulnerability in the SIP processing subsystem of Cisco BroadWorks could allow an unauthenticated, remote attacker to halt the processing of incoming SIP requests, resulting in a denial of service (DoS) condition. This vulnerability is due to improper memory handling for certain SIP requests. An attacker could exploit this vulnerability by sending a high number of SIP requests to an affected system. A successful exploit could allow the attacker to exhaust the memory that was allocated to the Cisco BroadWorks Network Servers that handle SIP traffic. If no memory is available, the Network Servers can no longer process incoming requests, resulting in a DoS condition that requires manual intervention to recover.
Credit: psirt@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco BroadWorks Xtended Services Platform |
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Reference Links
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bw-sip-dos-mSySbrmt
- https://blog.clamav.net/2025/01/clamav-142-and-108-security-patch.html
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-ole2-H549rphA
- https://www.bleepingcomputer.com/news/security/cisco-warns-of-denial-of-service-flaw-with-poc-exploit-code/
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2025-20165?
The severity of CVE-2025-20165 is classified as high due to its potential to cause a denial of service.
How do I fix CVE-2025-20165?
To fix CVE-2025-20165, apply the latest security patch provided by Cisco for BroadWorks.
What type of attack is enabled by CVE-2025-20165?
CVE-2025-20165 allows an unauthenticated, remote attacker to execute a denial of service attack on the BroadWorks system.
Which software is affected by CVE-2025-20165?
CVE-2025-20165 affects Cisco BroadWorks due to improper memory handling in its SIP processing subsystem.
Can CVE-2025-20165 be exploited without authentication?
Yes, CVE-2025-20165 can be exploited by an unauthenticated attacker.
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