Mitigating DNS random subdomain DDoS attacks by distinct heavy hitters sketches

Shir Landau Feibish, Yehuda Afek, Anat Bremler-Barr, Edith Cohen, Michal Shagam

פרסום מחקרי: פרק בספר / בדוח / בכנספרסום בספר כנסביקורת עמיתים

תקציר

Random Subdomain DDoS a.acks on the Domain Name System (DNS) infrastructure are becoming a popular vector in recent a.acks (e.g., recent Mirai a.ack on Dyn). In these a.acks, many queries are sent for a single or a few victim domains, yet they include highly varying non-existent subdomains generated randomly. Motivated by these a.acks we designed and implemented novel and efficient algorithms for distinct heavy hi.ers (dHH). A (classic) heavy hi.er (HH) in a stream of elements is a key (e.g., the domain of a query) which appears in many elements (e.g., requests). When stream elements consist of key, subkey¿ pairs, (domain, subdomain¿) a distinct heavy hi.er (dhh) is a key that is paired with a large number of di.erent subkeys. Our algorithms dominate previous designs in both the asymptotic (theoretical) sense and practicality. Speciffically the new .xed-size algorithms are simple to code and with asymptotically optimal space accuracy tradeoffs. Based on these algorithms, we build and implement a system for detection and mitigation of Random Subdomain DDoS a.acks. We perform experimental evaluation, demonstrating the effectiveness of our algorithms.

שפה מקוריתאנגלית
כותר פרסום המארחHotWeb 2017 - Proceedings of the 5th ACM/IEEE Workshop on Hot Topics in Web Systems and Technologies
מוציא לאורAssociation for Computing Machinery, Inc
מסת"ב (אלקטרוני)9781450355278
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - 14 אוק׳ 2017
אירוע5th ACM/IEEE Workshop on Hot Topics in Web Systems and Technologies, HotWeb 2017 - San Jose, ארצות הברית
משך הזמן: 14 אוק׳ 2017 → …

סדרות פרסומים

שםHotWeb 2017 - Proceedings of the 5th ACM/IEEE Workshop on Hot Topics in Web Systems and Technologies

כנס

כנס5th ACM/IEEE Workshop on Hot Topics in Web Systems and Technologies, HotWeb 2017
מדינה/אזורארצות הברית
עירSan Jose
תקופה14/10/17 → …

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