@techreport{oai:ipsj.ixsq.nii.ac.jp:00200770,
 author = {Kenya, Ota and Tsunehiko, Suzuki and Kenya, Ota and Tsunehiko, Suzuki},
 issue = {11},
 month = {Nov},
 note = {The risk of DNS cache poisoning attacks using IP fragmentation was presented by Herzberg and Shulman in 2012 and 2013. And we showed that the attacks are feasible, and several open-source implementations were still affected by the attacks. In the wake of our proposal, measures to major open-source implementations for ignoring NS records in Authority or Additional sections of negative response at DNS cache server, and for ignoring Path MTU Discovery at DNS authoritative server were taken. Also, DNS flag day 2020 is planned to take measures against fragmentation attacks such as reducing default EDNS buffer size. If the authoritative servers that manage TLDs or multiple zones have not been taken measures, this attack increases the risk of massive hijacking at once. In this research, we survey whether authoritative servers that manage TLDs can be affected by the attacks., The risk of DNS cache poisoning attacks using IP fragmentation was presented by Herzberg and Shulman in 2012 and 2013. And we showed that the attacks are feasible, and several open-source implementations were still affected by the attacks. In the wake of our proposal, measures to major open-source implementations for ignoring NS records in Authority or Additional sections of negative response at DNS cache server, and for ignoring Path MTU Discovery at DNS authoritative server were taken. Also, DNS flag day 2020 is planned to take measures against fragmentation attacks such as reducing default EDNS buffer size. If the authoritative servers that manage TLDs or multiple zones have not been taken measures, this attack increases the risk of massive hijacking at once. In this research, we survey whether authoritative servers that manage TLDs can be affected by the attacks.},
 title = {A survey on the status of measures against IP fragmentation attacks on DNS},
 year = {2019}
}