Shellshock protection using nginx ?

[Pekka.Panula at sofor.fi]

Hi

I have seen eg. Netscaler response policy which can detect if someone is 
trying shellshock bug using http headers.

I am using nginx as reverse proxy so is there good way to make a similar 
protection using nginx features? 
eg. checking http headers and drop/return 404 if shellshock code is 
detected?

Regards,
 Pekka Panula

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