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Vulnerabilities of Reliable Multicast Protocols

This review covers the vulnerabilities, attacks, defenses, and protocols related to reliable multicast transmission, including RMP and SRM. Learn about the risks, solutions, and defense mechanisms to enhance network security.

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Vulnerabilities of Reliable Multicast Protocols

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  1. Vulnerabilities of Reliable Multicast Protocols Thomas M. Park, David A. Kassay, Clifford J. Weinstein Massachusetts Institute of Technology Lincoln Laboratory Lexinton, Massachusetts Reviewed by: Siu Fung (Andes) Chin

  2. Vulnerabilities of Reliable Multicast Protocols • Outline • Introduction • Types of Protocols • Attacks • Defenses • Conclusion

  3. Multiple unicast transmission TCP/IP Multicast transmission RMP SRM Introduction

  4. Introduction (cond.) • Why reliable multicast transmission? • More efficient • Problems? • Lack of security • Solutions? • Network-level security (IPSEC) • Secret-key algorithm • Risk management approach

  5. Types of reliable multicast protocols • Sender-initiated reliability protocol • Positive acknowledgment (ACK) • ACK implosion • Example: RMP(Reliable Multicast Protocol) • Token around ring

  6. Types of reliable multicast protocols (cont) • Receiver-initiated reliability protocol • Negative acknowledgment (NCK) • NCK implosion • Example: SRM(Scalable Reliable Multicast Protocol) • Suppress excess NAK

  7. Vulnerabilities • Flooding attack • Consume network bandwidth/process time • Forged data attack • Corruption of files transmitted (RMP) • Premature ACK • Assign incorrect sequence no. (RMP) • NAK and retransmission suppression • Interfare retransmissions (SRM)

  8. Defense • Fliter received packets • Block attacker’s packet • Digitally signed messages • Identify legitimate members • Employ IGMP v3 (Internet Group Management Protocol) • Prevent flooding • Simple authentication protocol • Prevent spoofing

  9. Conclusion • Different types reliable multicast protocol • Different types attack • Different types defense • Increase protection – increase cost • Questions?

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