Mastering Telecom Security: A Deep Dive into GSMA FS.38 for SIP Networks
Sniffing or spoofing unencrypted SIP signaling headers to harvest user metadata or intercept communication. gsma fs.38
: By identifying evidenced risks and providing baseline controls, it enables operators to establish a strong security posture before an incident occurs. Mastering Telecom Security: A Deep Dive into GSMA FS
: Exploiting high-cost international call routes. Robocalling : Automated bulk calls. Robocalling : Automated bulk calls
The FS.38 guide advocates for a holistic security posture, recommending that operators go beyond basic SBC protection and actively use technologies such as dedicated SIP firewalls. A SIP firewall can perform critical functions that an SBC may not, such as correlating incoming messages with data from other signaling protocols, actively querying external platforms for context, and creating tailored, dynamic security policies.
: The document describes specific technical countermeasures and firewall implementation guidelines to mitigate these risks. Core Recommendations
Flood stateful SIP servers to drop legitimate user registration and call routing.