Re: [TLS] Another IRINA bug in TLS

Karthikeyan Bhargavan <karthik.bhargavan@gmail.com> Mon, 25 May 2015 12:28 UTC

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From: Karthikeyan Bhargavan <karthik.bhargavan@gmail.com>
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Date: Mon, 25 May 2015 14:27:55 +0200
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Subject: Re: [TLS] Another IRINA bug in TLS
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Argh, percentages revesed:

Alexa Top 1M:      45 K hosts out of 539K HTTPS hosts (8.4%)
Browser-trusted : 706K hosts out of 14.3M HTTPS hosts with browser trusted certs (4.9%)

On 25 May 2015, at 14:26, Karthikeyan Bhargavan <karthik.bhargavan@gmail.com>; wrote:

> 
> On 25 May 2015, at 14:02, Hubert Kario <hkario@redhat.com>; wrote:
> 
>>> Hubert Kario's latest results on
>>> https://securitypitfalls.wordpress.com/2015/03/29/march-2015-scan-results/
>>> show:
>>> EXP-EDH-RSA-DES-CBC-SHA 22110     4.5043%
>> 
>> hmm, that is a bit big difference...
>> 
>> If I ignore the "trust" bit in results I'm still getting just:
>> EXP-EDH-RSA-DES-CBC-SHA 41804     6.2565
> 
> At weakdh.org, we use numbers from the ZMap scans (https://scans.io/)
> 
> In March 2015, the number of servers supporting for TLS_DHE_*_EXPORT_* were:
> 
> Alexa Top 1M:      45 K hosts out of 539K HTTPS hosts (4.9%)
> Browser-trusted : 706K hosts out of 14.3M HTTPS hosts with browser trusted certs (8.4%)
> 
> We think the numbers should have gone down some, partly due to servers turning off *_EXPORT_*
> in the wake of FREAK (but sadly, not nearly enough servers reacted to FREAK).
> 
> Best,
> Karthik
> 
> 
> 
> 
> 
> 
>> 
>> From 668168 sample.
>> 
>> But then there is something which matches rather well the percentage:
>> EDH-RSA-DES-CBC-SHA     75939     11.3653
>> (note the lack of "EXP-")
>> -- 
>> Regards,
>> Hubert Kario
>> Quality Engineer, QE BaseOS Security team
>> Web: www.cz.redhat.com
>> Red Hat Czech s.r.o., Purky┼łova 99/71, 612 45, Brno, Czech Republic_______________________________________________
>> TLS mailing list
>> TLS@ietf.org
>> https://www.ietf.org/mailman/listinfo/tls
> 
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