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DNS Zehirlenmesi (DNS Poisoning)

DNS sunucusuna kendisinde olmayan bir kaydı sorup aynı zamanda sorusunun cevabını da yollaması halinde DNS sunucusunun cacheine istediği kaydı yazdırabilir.

IP adresi bilinmeyen bir siteyi recurse olarak sorgulamazsak.

$ dig mertcangokgoz.com +norecurse

; <<>> DiG 9.10.3-P4-Raspbian <<>> mertcangokgoz.com +norecurse
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4675
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1452
; OPT=12: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ("..............................................")
;; QUESTION SECTION:
;mertcangokgoz.com.             IN      A

;; ANSWER SECTION:
mertcangokgoz.com.      300     IN      A
mertcangokgoz.com.      300     IN      A

;; Query time: 35 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Apr 06 17:23:02 +03 2019
;; MSG SIZE  rcvd: 162

IP adresi bilinmeyen bir siteyi recurse olarak sorgularsak.

$ dig mertcangokgoz.com

; <<>> DiG 9.10.3-P4-Raspbian <<>> mertcangokgoz.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29538
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1452
; OPT=12: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ("..............................................")
;; QUESTION SECTION:
;mertcangokgoz.com.             IN      A

;; ANSWER SECTION:
mertcangokgoz.com.      300     IN      A       104.31.83.25
mertcangokgoz.com.      300     IN      A       104.31.82.25

;; Query time: 48 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Apr 06 15:19:04 +03 2019
;; MSG SIZE  rcvd: 162

Tekrardan recurse sorgu olmadan sorarsak.

$ dig mertcangokgoz.com +norecurse

; <<>> DiG 9.10.3-P4-Raspbian <<>> mertcangokgoz.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50059
;; flags: qr ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1452
; OPT=12: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ("..............................................")
;; QUESTION SECTION:
;mertcangokgoz.com.             IN      A

;; ANSWER SECTION:
mertcangokgoz.com.   3596    IN  A   1.1.1.1

;; Query time: 2 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sun Jul 29 11:07:10 +03 2018
;; MSG SIZE  rcvd: 65

Son Güncelleme: 28 Mayıs 2020