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Re: [TLS] Last Call: <draft-ietf-tls-downgrade-scsv-03.txt>

2015-01-22 10:17:18
On Wednesday 21 January 2015 16:45:31 Michael D'Errico wrote:
Martin Rex wrote:
Rubber-Stamping the fallback-scsv hack onto the standards track is
IMHO a very bad idea.

I apologize if this has been discussed before (I have about 1400
unread TLS mailing list messages in my queue), but it seems that
a simpler SCSV or extension could just ask the server to echo its
highest supported version:

     ClientHello w/SCSV    ----->
                           <-----    ServerHello w/version extension

that's not allowed by the RFC's, the server can send back only the extension 
id's client has sent

-- 
Regards,
Hubert Kario
Quality Engineer, QE BaseOS Security team
Web: www.cz.redhat.com
Red Hat Czech s.r.o., Purkyňova 99/71, 612 45, Brno, Czech Republic


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