[Pdns-users] Crappy DNS query make Mysql/Pdns crash

bert hubert ahu at ds9a.nl
Thu Apr 1 19:29:08 UTC 2004

On Tue, Mar 30, 2004 at 12:10:36AM +0200, Lorens Kockum wrote:

> Hmmm. Couldn't there be a problem with 36 queries like
> "a%.example.com", "b%.example.com", ... "9%.example.com"
> resulting in an effective zone transfer ?

What happens is that PowerDNS internally knows it has to do a 'like' query
for certain questions. To prevent that from happening when it is not needed,
pdns checks for a % as the first character of a domain. But it forgets that
stuff in the middle of a domain can come up front during processing the

www.example.com leads to a example.com and a com and a . question. 

Will release 2.9.17 asap.

http://www.PowerDNS.com      Open source, database driven DNS Software 
http://lartc.org           Linux Advanced Routing & Traffic Control HOWTO

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