[tor-bugs] #8443 [Tor]: SSL handshake filtered when MAX_SSL_KEY_LIFETIME_ADVERTISED is 365 days

Tor Bug Tracker & Wiki blackhole at torproject.org
Sun Mar 10 16:14:28 UTC 2013


#8443: SSL handshake filtered when MAX_SSL_KEY_LIFETIME_ADVERTISED is 365 days
------------------------+---------------------------------------------------
 Reporter:  arma        |          Owner:                    
     Type:  defect      |         Status:  needs_revision    
 Priority:  normal      |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor         |        Version:                    
 Keywords:  tor-bridge  |         Parent:                    
   Points:              |   Actualpoints:                    
------------------------+---------------------------------------------------

Comment(by phw):

 I downloaded the EFF's SSL observatory data and calculated the certificate
 life times. Here are the top 20 in ascending order:

 {{{
 5159   1825 days, 0:00:00
 5895   790 days,  23:59:59
 6552   761 days,  0:00:00
 7199   366 days,  23:59:59
 7569   1461 days, 23:59:59
 8503   760 days,  23:59:59
 9101   369 days,  23:59:59
 10190  1099 days, 23:59:59
 10472  425 days,  23:59:59
 14865  395 days,  23:59:59
 15284  1826 days, 23:59:59
 19428  731 days,  0:00:00
 22130  1095 days, 0:00:00
 51588  1096 days, 0:00:00
 65542  730 days,  0:00:00
 79855  1095 days, 23:59:59
 85521  730 days,  23:59:59
 85526  1826 days, 0:00:00
 94504  365 days,  0:00:00
 157614 365 days,  23:59:59
 }}}

 One year seems to be the most popular life time. Simply dropping such
 certificates would imply a large collateral damage, so there is probably
 something else we are missing so far.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8443#comment:7>
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