Disabling Request Body Access in ModSecurity 3 Leads to Complete Bypass
If you are running ModSecurity 3 with request body access disabled, then I have some bad news. Please sit down, this will be a while. If you are running ModSecurity 2, or you give the engine access to the request body, then you are not affected. But maybe you want to read this post nevertheless. I’ll be discussing a new ModSec3 vulnerability an upcoming new CRS feature and some fundamental problems affecting existing ModSecurity rule sets.