Re: [HASMAT] HSTS Threat prevalence

"Steingruebl, Andy" <asteingruebl@paypal-inc.com> Fri, 06 August 2010 18:51 UTC

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From: "Steingruebl, Andy" <asteingruebl@paypal-inc.com>
To: Devdatta Akhawe <dev.akhawe@gmail.com>, IETF HASMAT list <hasmat@ietf.org>
Date: Fri, 06 Aug 2010 12:52:19 -0600
Thread-Topic: [HASMAT] HSTS Threat prevalence
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Subject: Re: [HASMAT] HSTS Threat prevalence
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> -----Original Message-----
> From: hasmat-bounces@ietf.org [mailto:hasmat-bounces@ietf.org] On
> Behalf Of Devdatta Akhawe
> Sent: Friday, August 06, 2010 11:36 AM
> To: IETF HASMAT list
> Subject: [HASMAT] HSTS Threat prevalence
> 
> Hi all
> 
> The HSTS specification talks about possible attacks that could be prevented
> by the use of HSTS. Do we have any data that suggests these attacks are
> actually a concern / being used by attackers anywhere ? I couldn't find any
> citation to this effect in the specification.

We are actively doing research in this area, but we don't know of any published work at this point. 

For the wider audience - do you want to know:
1. Whether this is occurring
2. Its overall frequency/distribution
3. Both

Which of these would be most compelling?  On a percentage basis the number of connections being observed by passive network attackers is probably very small.  That doesn't by itself mean to should get rid of TLS.  

Me - I initially want the answer to #1, and then to #2.

- Andy