Multiple DNS implementations vulnerable to cache poisoning

Simon Waters simonw at
Wed Jul 9 13:38:38 UTC 2008

On Wednesday 09 July 2008 14:16:53 Jay R. Ashworth wrote:
> On Wed, Jul 09, 2008 at 04:39:49AM -0400, Jean-Fran?ois Mezei wrote:
> > My DNS server made the various DNS requests from the same port and is
> > thus vulnerable. (VMS TCPIP Services so no patches expected).
> Well, yes, but unless I've badly misunderstood the situation, all
> that's necessary to mitigate this bug is to interpose a non-buggy
> recursive resolver between the broken machine and the Internet at
> large, right?

He said "DNS server", which you wouldn't want to point at a correct named, 
because that would be forwarding, and forwarding has its own security issues.

I've already dragged a name server here back to a supported OS version today 
because of this, don't see why others should escape ;)

More information about the NANOG mailing list