It is not possible to download the SS7 protocol itself, as it is a proprietary signaling system used by telecommunications networks. The SS7 protocol is owned by telecommunications equipment vendors, and access to the protocol is generally restricted to network operators and service providers.
However, there are several tools and resources available for researchers and security professionals who are interested in learning more about the SS7 protocol and its vulnerabilities. These include open-source software tools for testing and analyzing the SS7 network, as well as research papers and articles that discuss the protocol and its security risks.
One such tool is the open-source library libss7, which provides a suite of tools for testing and analyzing the SS7 network. Other tools include Wireshark, a popular network protocol analyzer that can capture and analyze SS7 traffic, and SigPloit, an open-source SS7 vulnerability scanner that can perform a variety of SS7 attacks, including call interception and SMS interception.
Research papers and articles on SS7 and its vulnerabilities can be found in academic journals and online publications, as well as on the websites of cybersecurity research firms and organizations.
It is worth noting that accessing or testing the SS7 network without proper authorization or permission from the network operator or service provider may be illegal and can lead to legal consequences. It is important to consult with a qualified security professional before conducting any vulnerability testing on an SS7 network.
