Unauthorized interception of signaling data to harvest metadata or eavesdrop on communications.
The FS.38 document is a practical guide, detailing specific threats and their corresponding countermeasures. Some of the most critical threats addressed in the guide include: gsma fs.38
SIP serves as the structural backbone for initiating, maintaining, and terminating real-time sessions including voice, video, and messaging. Because SIP mirrors standard HTTP/web-based textual structures, it is highly susceptible to exploitation if left unprotected. Share public link : Flood attacks aimed at
: Sending SIP signaling state logs and media telemetry into a central Next-Gen SIEM for real-time traffic analysis. and terminating real-time sessions including voice
Are you interested in exploring how integrates with 5G-specific security protocols like FS.36 ? Share public link
: Flood attacks aimed at overwhelming SBCs or IMS core infrastructure to take down emergency lines or general operator voice services.
GSMA FS.38 formally rejects this single-perimeter assumption. If an attacker exploits a misconfiguration or a zero-day vulnerability in an edge device, they gain unhindered access to an unhardened core. Modern attacks utilize complex protocol correlation—leveraging flaws across SIP, Diameter, and GTP protocols simultaneously—to bypass standalone SBC filters. FS.38 shifts the industry toward a model, mandating that internal nodes must be independently hardened and tested. Key Threat Vectors Addressed by FS.38