North American Network Operators Group
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Re: Vulnerability Issue in Implementations of the DNS Protocol

  • From: Simon Waters
  • Date: Tue May 24 11:04:54 2005 
On Tuesday 24 May 2005 2:57 pm, Fergie (Paul Ferguson) wrote:
> UNIRAS (UK Gov CERT)/NISCC:
> http://www.niscc.gov.uk/niscc/docs/al-20050524-00433.html

Seems to be similar to an issue discussed on Bugtraq in 1999 where they looked 
to exploit the recursive nature of some DNS decompression implementations to 
create a loop in the decompression code. At the time BIND wasn't vulnerable, 
which doesn't stop client side code being vulnerable, but would have 
mitigated the problem then.

Still we could do with some more details, although I guess enough detail to 
start checking source code for the dedicated.