Date: Thu, 16 Oct 2014 09:56:06 -0600 From: Kurt Seifried <kseifried@...hat.com> To: oss-security@...ts.openwall.com Subject: Re: attacking hsts through ntp On 16/10/14 06:03 AM, Hanno Böck wrote: > it's a pretty neat and simple idea: > Kill HSTS through NTP by sending victims PC into the future. > https://www.blackhat.com/docs/eu-14/materials/eu-14-Selvi-Bypassing-HTTP-Strict-Transport-Security-wp.pdf > > Same should work for HPKP. The idea of setting some security feature > through a header needs a revisit. > The solution would be to have a more reliable PC time. How do we do > that? The obvious solution being to whitelist your site (in the chrome/firefox source code)if you truly care: email agm@...omium.org asking to be added to the whitelist, from the domain you want white listed (otherwise they tend to ignore it). Usually within a few business days they'll add it to the source code, and then in the next browser update they will update the list and you will now be white listed. https://chromium.googlesource.com/chromium/chromium/+/trunk/net/http/transport_security_state_static.json I've done this for my domains, you should too! -- Kurt Seifried -- Red Hat -- Product Security -- Cloud PGP A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993 Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)
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