Service Catalog uses a Tomcat web server. You might need to check whether HTTP Methods PUT or DELETE from Tomcat is actually blocked.
How to check whether or not the HTTP method PUT or DELETE from Tomcat is blocked?
CA Service Catalog 12.9, 14.1 and 17.x
The best way to verify if Tomcat HTTP methods PUT or DELETE are blocked or not is to use a tool like postman (you can download postman app from get postman app here)
See the screenshots below - all you need to do is to simply provide the Service Catalog URL and choose the method and then click 'send'
GET method is ‘permitted’
PUT method is ‘forbidden’