FreeBSD Security Advisory FreeBSD-SA-09:04.bind

Doug Barton dougb at FreeBSD.org
Wed Jan 14 22:35:45 PST 2009


Carl Friend wrote:
>    Hi Leonid,
> 
>    I got the message, so it looks like at least something is working.
> 
>    From the advisory:
> 
>> NOTE WELL: If named(8) is not explicitly set to use DNSSEC the setup
>> is not vulnerable to the issue as described in this Security Advisory.
> 
>    We are not using DNSSEC on either the internal or external BIND
> instances.  We *are* using authentication keys for some of the internal
> infrastructure (for dynamic updates) but not for the external, and
> this facility uses shared-secrets anyway rather than PKI.

When you say "authentication keys" I assume you mean TSIG. If so, that
is not affected by this advisory.

>    I think we're OK unless we're going to light up DNSSEC in the near
> future.

You are only vulnerable to a potential man-in-the-middle attack IF you
are validating DNSSEC signatures AND IF the signatures on that record
involve DSA.

Doug

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