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Re: CSP: Minimum cipher strength

From: Frederik Braun <fbraun@mozilla.com>
Date: Wed, 10 Sep 2014 10:27:54 +0200
Message-ID: <54100B8A.4070505@mozilla.com>
To: public-webappsec@w3.org
What if the User Agent was to remember the current strength (implicitly
obtained?) and never to accept a weaker setup in the future?


On 10.09.2014 09:57, Mike West wrote:
> +palmer, sleevi
> 
> Limiting the cipher suites which are acceptable for subresources seems
> brittle. User agents should simply refuse to accept insecurely
> configured SSL, rather than asking sites to keep up to date with the
> latest understanding of the crypto landscape.
> 
> This feels like something that might be better suited to HSTS/PKP than
> CSP. In particular, some sort of flag on those headers that would
> prevent mixed-pinning might be a valuable addition.
> 
> -mike
> 
> --
> Mike West <mkwst@google.com <mailto:mkwst@google.com>>
> Google+: https://mkw.st/+, Twitter: @mikewest, Cell: +49 162 10 255 91
> 
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> 
> On Tue, Sep 9, 2014 at 11:03 AM, Frederik Braun <fbraun@mozilla.com
> <mailto:fbraun@mozilla.com>> wrote:
> 
>     On 08.09.2014 22 <tel:08.09.2014%2022>:54, Erlend Oftedal wrote:
>     > Hi
>     >
>     > Reading the chapter this blog
>     > post http://marc.durdin.net/2014/09/risks-with-third-party-scripts-on-internet-banking-sites/
>     made
>     > me think about the problem of using third party scripts where the
>     > SSL/TLS is poorly configured, and how we could deal with that.
> 
>     You can reduce the risk of trusting third party scripts with
>     http://www.w3.org/TR/SRI/ ;-)
> 
> 
Received on Wednesday, 10 September 2014 08:28:24 UTC

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