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DNS cache poisoning - Are you Impacted ?

What is DNS cache poisoning ?

DNS cache poisoning (also known as DNS cache pollution) is a maliciously created or unintended situation that provides data to a Domain Name Server that did not originate from authoritative DNS sources. It occur if DNS "spoofing attack" has been encountered. An attacker will send malicious data / non-secure data in response to a DNS query. For example dns query for www.google.com can be redirected to www.example.com

There are several DNS servers vulnerable to these attack, http://www.kb.cert.org/vuls/id/800113

How do I verify that my ISP or my own recursive resolvers are free from DNS cache poisoning bug ?

There are serveral tools online to find out,

http://member.dnsstuff.com/tools/vu800113.php
http://www.doxpara.com/

Regards,
VINOD M

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This entry was posted on Thursday, July 24, 2008 at 11:47 PM. You can skip to the end and leave a response.

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