By Carsten Strotmann                                on 21 Sep 2022

IP fragmentation and the DNS — the state of IP fragmentation

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2022-09-22 10:00:07

By Carsten Strotmann on 21 Sep 2022

Category: Tech matters

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Instances of attackers using IP fragmentation to poison the cache of the Domain Name System (DNS) have been known for almost a decade. However, until recently, no one has conclusively studied the frequency of IP fragmentation on the Internet nor how effective known mitigation strategies are to such attacks.

In this three-part series, I will report on the findings of a study contracted by the German Federal Cyber Security Authority (BSI) and conducted between December 2019 and September 2021 on the topic of IP fragmentation and DNS traffic.

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