ip multimedia subsystem (ims) signaling core security
The IMS leverages the Session Initiation Protocol (SIP) as its core signaling method between network elements inside the core. Communications between the P-CSCF, I-CSCF, and S-CSCF take place via SIP over either Transport Control Protocol (TCP) or User Datagram Protocol (UDP) over Internet Protocol (IP). There are numerous, well documented, vulnerabilities associated with SIP, TCP, and UDP to which the IMS signaling core is potentially vulnerable as well [10][5]. This paper explores and enumerates possible vulnerabilities inherent to the IMS signaling core, and their countermeasures.
ims core security sip voip cscf