In a recent video, Linus Tech Tips exposed vulnerabilities in the phone network by demonstrating how easily attackers can intercept calls and steal two-factor authentication codes using the outdated Signaling System No. 7 (SS7). The video emphasized the need for better security practices, recommending alternatives to SMS for two-factor authentication and highlighting the importance of using encrypted communication services to protect personal information.
In a recent video from Linus Tech Tips, Linus and his team demonstrated a significant vulnerability in the phone network by intercepting phone calls and stealing two-factor authentication codes without any direct interaction with the target’s phone. They explained that this was achieved remotely, highlighting the alarming ease with which such attacks can occur. The discussion revealed that this type of hacking could potentially affect anyone, emphasizing the need for awareness about the security of mobile communications.
The video delved into the historical context of phone hacking, referencing the early exploits of Steve Jobs and Steve Wozniak in the 1970s with their creation of the “blue box,” which allowed users to make free long-distance calls by manipulating the telephone network. This laid the groundwork for understanding how vulnerabilities in the system could be exploited. The evolution of telephone technology, from manual operators to automated systems, was explained, leading to the introduction of touch-tone phones and the subsequent development of the Signaling System No. 7 (SS7), which is still in use today.
SS7 was designed to facilitate communication between different telecom networks, but its security flaws have become apparent over the years. The video highlighted how attackers can infiltrate SS7, gain trust, and execute attacks to intercept calls and messages. A real-world example was provided, detailing how Princess Latifa of Dubai was tracked down using SS7 vulnerabilities, showcasing the serious implications of these security weaknesses.
The team demonstrated their ability to reroute Linus’s phone calls and intercept messages by exploiting SS7, revealing that all that was needed was Linus’s phone number. They explained that this could allow hackers to listen in on conversations and steal sensitive information, such as one-time passwords for two-factor authentication. The ease of executing such attacks raised concerns about the reliance on SMS-based authentication, which is often the only option available for securing accounts.
To mitigate these risks, the video suggested alternatives to SMS for two-factor authentication, such as using authenticator apps or hardware tokens. It also recommended encrypted internet-based calling services like Signal or WhatsApp for secure communications. The discussion concluded with a reflection on the broader implications of privacy and security in the digital age, emphasizing the importance of being informed and proactive in protecting personal information against potential intrusions.