CCITT Standardizes SS7 (Signaling System No. 7)
Global standardization of SS7 protocol suite across mobile and fixed line networks, built on implicit trust without authentication.
⚙️ Deep-Dive Technical Analysis
SS7 was standardized assuming all participating operators were trusted state monopolies. It lacks cryptographic signatures, origin validation, or message level authentication, allowing any node to impersonate HLRs/VLRs.
⚡ Vulnerability & Exploit Flow
Unauthenticated message injection across SIGTRAN/SS7 proxies.
🛡️ Recommended Defense & Mitigation Protocol
Deploy GSMA FS.11 / FS.19 Signaling Firewalls and SS7 SMS filtering.
🚨 Security Impact & Geopolitical Consequence
Created systemic flaws for location tracking and SMS 2FA interception.
📚 Authoritative Standards & External References
Master 5G Core, SS7 Defense & Subsea Cable Auditing
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