#9564 NORM Not Tri: XO-1: RTC anti-rollback

Zarro Boogs per Child bugtracker at laptop.org
Wed Oct 28 14:55:34 EDT 2009

#9564: XO-1: RTC anti-rollback
           Reporter:  wmb at firmworks.com    |       Owner:  wmb at firmworks.com
               Type:  enhancement          |      Status:  assigned         
           Priority:  normal               |   Milestone:  Not Triaged      
          Component:  ofw - open firmware  |     Version:  not specified    
         Resolution:                       |    Keywords:                   
        Next_action:  code                 |    Verified:  0                
Deployment_affected:                       |   Blockedby:                   
           Blocking:                       |  

Comment(by wmb at firmworks.com):

 Replying to [comment:2 mikus]:
 > How about a clock-rollforward attack -- suppose I see your XO sitting
 there, and surreptitiously in root change the time (and RTC) to say it is
 now the year 2015 - then reboot.  Would your XO from then on keep showing
 the wrong date ?

 That is indeed a risk.  Locks can be used against the owner.

 The feature will have to be enabled with a special manufacturing data tag
 - I forgot to mention that in the description above.

Ticket URL: <http://dev.laptop.org/ticket/9564#comment:3>
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