[nsd-users] OpenSSL heartbleed bug

[W.C.A. Wijngaards]

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Hi Daisuke,

On 04/11/2014 04:00 PM, Daisuke HIGASHI wrote:
> (To unbound-users / nsd-users)
> 
> Hi,
> 
> OpenSSL heartbleed bug (CVE-2014-0160) affects Unbound/NSD?

NSD and Unbound have DNSSEC that does not use TLS, so they are not
affected by heartbleed for DNSSEC.

> I believe that unbound-control, ssl-upstream(unbound's), and
> nsd-control depends on OpenSSL to make secure channel. (though
> remote control is usually allowed from localhost only...)

Yes the default is from localhost.  Additionally, nsd-control and
unbound-control require a client certificate.  This seems to stop the
attack (when we tested it).

Unbound's ssl-upstream, ssl-service and unbound-anchor are options and
tools that create TLS connections.  This is vulnerable to heartbleed.
 Unbound-anchor is a client side, short lived process with no secrets,
it makes TLS connections in exceptional circumstances.  ssl-upstream
makes client connections.  Unbound's ssl-service options create a TLS
server, and this is vulnerable.  The public TLS dnssec-trigger server
has had openssl upgraded.

Best regards,
   Wouter

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