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DNS Cache Poisoning

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by

Oren Benshabat

on 16 October 2013

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Transcript of DNS Cache Poisoning

DNS Cache Poisoning
A Talk by Oren Benshabat
I am a third year Ethical Hacker
@orenbenshabat
Other Things
What Will Be Covered?
What is DNS Cache Poisoning?
How a DNS Server Works
Recursive DNS Server
Authoritative DNS Server
DNS Records
Standard DNS Request
Setting Up a DNS Server
BIND DNS 9.4.1
WARNING
The Attack
Scenario
Bailiwick Checking
HACKED!
Taking it to the next level!
Dan Kaminsky
123xyz.google.com
Now In Control
Take it to an even higher level!
A lot more processing power
(almost) The Entire Internet was vulnerable
Countermeasures
Patch
Patch
Patch
Randomize source port
DNSSEC
Verified Sources
Questions?
References
Too many to fit in a slide
See my whitepaper on the machines
Introduction
Full transcript