BGP hijacking

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News: After Telegram was briefly restricted by the Union government,the messaging platform’s founder and CEO, Pavel Durov, alleged that access to the app was being compromised through a “rogue method” called Border Gateway Protocol (BGP) hijacking. 

About BGP hijacking

Example of a BGP Route Hijack
Source: National Institute of Standards and Technology
  • The Border Gateway Protocol (BGP) is the Internet’s routing system. 
  • It tells networks across the world how to reach specific IP addresses. 
  • It was developed in the late 1980s. 
  • How it works:
    • Every major telecom operator, cloud provider, content delivery network and internet service provider runs an Autonomous System (AS), a large network identified by a unique number. 
    • BGP is the protocol which these networks use to tell how traffic through these networks should reach a specific IP address (destination).
    • Neither the destination nor the route is authenticated.
    • Without BGP, networks would not know where to send data once it left their own systems, making global internet connectivity virtually impossible.
  • BGP hijack: If a network accidentally publishes incorrect routing information or deliberately announces routes that do not belong to it, traffic can be redirected through the wrong path. It is commonly known as a BGP hijack.
  • Threats associated: BGP hijacks can expose personal information, enable theft, extortion, and state-level espionage, and disrupt security-critical transactions, including in the financial sector.             
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