Global Title Abuse

Global Title abuse is the SS7 attack pattern in which an adversary sends signalling messages with a forged or unauthorised SCCP Global Title, causing the recipient to act as if the message originated from a trusted peer. It is the foundation of most SS7 location-tracking and interception attacks. Mitigation requires Global Title screening at the SS7 firewall, validation that the calling Global Title matches the originating signalling link, and category-based filtering of MAP operations.

Categories: SignalingSecurity ControlsThreats and Attacks

Global Title Abuse in context

Signaling protocols carry the control-plane instructions that set up calls, register subscribers, hand over sessions and route SMS. SS7, Diameter, GTP-C and SIP are the four dominant families, and interconnect exposure of any of them is treated by GSMA FS.11 / FS.19 / FS.20 as a top-tier telecom risk.

Security controls in telecom span signaling firewalls (SS7/Diameter/GTP screening at the network edge), transport encryption (IPsec, TLS, PRINS), identity and access on OSS/BSS, and monitoring at both the packet and log level. Controls are audited against GSMA FS.11/FS.19/FS.20/FS.36 and, in Europe, NIS2 sectoral rules.

To place Global Title Abuse in the wider telecom-security picture, review Indicators of Compromise (Telecom IoCs), IPS, SS7 Interconnect Security, Threat Hunting (Telecom), STIR/SHAKEN and STP.

Related terms

Related topic hubs

  • SS7 Firewall GSMA FS.11 category 1/2/3 SS7 message screening at the STP edge.
  • SS7 Security SS7/MAP/CAP/SCCP attacks and defenses across 2G/3G interconnect.
  • Signaling Firewall Unified SS7/Diameter/GTP/SMS signaling firewall framework.
  • Diameter Attacks S6a IDR/PUR/CLR abuse, subscriber tracking, LTE signaling attacks.

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