mhenke1 commented on issue #3174: Change log level dynamically (updated)
URL: 
https://github.com/apache/incubator-openwhisk/pull/3174#issuecomment-356880064
 
 
   @rabbah (as discussed off-line)
   ?The thread opened by this PR is that somebody would be able elevate the 
system log level for calls to OpenWhisk by passing the X-OW-EXTRA-LOGGING 
header to the controller and impede the performance of the system.
   This performance hit would be restricted by the rate limiting mechanisms and 
the limited number 
   of system level logs, but could be notable nevertheless.?
   
   The risk of such an attack would be very low since it would require a change 
the configuration of 
   nginx (which blocks passing the header) which could be easily mitigated by 
redeployment  ?of the original configuration.??
   
   In the light of the risk assessment I would like to go forward with the PR 
as is.
   

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