BIND 9 Cache Update From Additional Section

[supriya samanta]

Hello All,

       

As per ISC security bulletin CVE-2009-4022 There is a problem with BIND 9 Cache Update From Additional Section

   

Problem Description: A Nameserver with DNSSEC validation enabled may incorrectly add records to its cache from the additional section of responses received during resolution of a recursive client query.This behavior only occurs when processing client queries with checking disabled

(CD).It may occur both when requesting,and not when requesting,DNSSEC records(DO).If the nameserver is authoritative-only this will not occur.

 

We have some business requirement where we need to reproduce the problem.

 

Could anyone advice a test case which I may use or direct me to some website which could be useful for this purpose.

 

Any help will be appreciated.

 

Many Thanks,

Supriya Samanta