An SS7 attack is a security vulnerability that exploits weaknesses in the Signaling System 7 (SS7) protocol, allowing attackers to intercept data, eavesdrop on communications, track locations, and steal sensitive information. In this article, I’ll explain SS7 attacks in detail and offer tips on how to stay aware and protect yourself.
SS7 Attack Overview
Starting with the definition, SS7 (Signaling System 7), is a set of protocols that telecommunications networks use worldwide to manage and route phone calls, text messages, and other services. It’s more like behind-the-scenes technology that makes communication possible, even between networks in different parts of the world.
However, SS7 was developed in 1975, so you know it was not designed with the modern security mindset. As a result, the system has many weak points/loopholes that attackers can exploit which is basically SS7 attack.
How do SS7 attacks work?
To launch an SS7 attack, an attacker typically needs access to the SS7 network, or to a part of it. This is why in most cases insiders with knowledge of the SS7 infrastructure are involved with facilitating these attacks. So trusted from a telecom company who has access to SS7 can sell that access to a malicious actor. In this case, the attacker does not need to break into a telecom company, they can use the SS7 protocol directly to conduct attacks.
Other than that telecom companies use gateways to connect their SS7 networks to external networks. These gateways can be a weak point and if an attacker gains access to these, they can easily access the SS7 network and exploit the weaknesses in the protocol.
Last but not least, telecoms trust one another when connected to the SS7, and not all companies have high network security. In such cases, hackers make one of these companies a target, attack the whole system, and access the SS7 network.
What after that?
If the SS7 protocol of the communication channel you are connected to is a victim of the SS7 attack, the hacker could easily steal any of your information. With that I mean intercept call and text messages, track your real-time location or prevent you from receiving phone calls and text messages.
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How to protect yourself?
By far I have told you about the attack, now let me explain to you the ways you can protect yourself. To be honest, you cannot really stop the SS7 attack from happening but there are several steps you can take to protect yourself and minimize risk:
- Enable Two-Factor Authentication (2FA): Always enable 2FA on your online accounts to add an extra layer of security. If possible, use apps like Google Authenticator or Authy instead of relying on SMS-based 2FA, which can be intercepted via SS7.
- Avoid Public Wi-Fi: Avoid using unsecured or public Wi-Fi networks, especially when conducting sensitive activities such as online banking. Public networks are often easier for attackers to intercept.
- Keep Your Software Updated: Regularly update your phone’s software to patch known vulnerabilities. While individual phone updates may not directly address SS7-related issues, keeping your software up to date is still an important security measure.
- Use a VPN for Added Security: When using mobile data or Wi-Fi, consider using a Virtual Private Network (VPN) to encrypt your internet traffic. This adds an extra layer of protection and helps prevent unauthorized interception.
Conclusion
Lastly, the SS7 system has a lot of flaws and an attack on one of these weak points is the SS7 attack. While you can not stop this from happening you can protect yourself by some of the ways like 2FA, avoiding public wi-fi, timely updating software, using VPN, and more. Stay alert, stay safe!
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