Examining CSCF entity attacks scenarios and vulnerabilities in IP Multimedia Subsystems

IP Multimedia Subsystems (IMS) were first innovated in 3^rd Generation Partnership to fill the gap between classical communications and the Internet. IMS has some security vulnerabilities despite its security mechanisms, which some attacks abuse them to threaten the network. Here we focus on Call Session Control Function (CSCF) and examine different attacks scenarios against it and the relevant vulnerabilities which indicated the relationship between security weaknesses and attacks, as well as that some attacks are a combination of different attacks.