2012/01/10 by J. S. Wrobel, Jan Wrobel, Wrobel, Jan
Computer Science · #Cryptography and Security (cs.CR) #FOS: Computer and information sciences #Internet Traffic Analysis and Secure E-voting #Network Security and Intrusion Detection #Network Traffic and Congestion Control #Networking and Internet Architecture (cs.NI) #cs.CR #cs.NI
paper · pdf · doi:10.48550/arxiv.1201.2074
openalex publication_date 2012/01/10 · arxiv created 2012/01/24 · arxiv updated 2012/01/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The paper demonstrates how traffic load of a shared packet queue can be exploited as a side channel through which protected information leaks to an off-path attacker. The attacker sends to a victim a sequence of identical spoofed segments. The victim responds to each segment in the sequence (the sequence is reflected by the victim) if the segments satisfy a certain condition tested by the attacker. The responses do not reach the attacker directly, but induce extra load on a routing queue shared between the victim and the attacker. Increased processing time of packets traversing the queue reveal that the tested condition was true. The paper concentrates on the TCP, but the approach is generic and can be effective against other protocols that allow to construct requests which are conditionally answered by the victim. A proof of concept was created to assess applicability of the method in real-life scenarios.