slack-user-token: Slack User token disclosure

id: slack-user-token

info:
  name: Slack User token disclosure
  author: Ice3man,DhiyaneshDK
  severity: high
  reference:
    - https://github.com/praetorian-inc/noseyparker/blob/main/crates/noseyparker/data/default/builtin/rules/slack.yml
    - https://api.slack.com/methods/users.list/test
    - https://api.slack.com/authentication
    - https://github.com/semgrep/semgrep-rules/blob/develop/generic/secrets/gitleaks/slack-user-token.yaml
    - https://github.com/semgrep/semgrep-rules/blob/develop/generic/secrets/gitleaks/slack-user-token.txt
  metadata:
    max-request: 1
    verified: true
  tags: exposure,token,slack,vuln

flow: http(1) && http(2)

http:
  - method: GET
    path:
      - "{{BaseURL}}"

    matchers:
      - type: regex
        part: body
        name: token
        regex:
          - 'xoxp-[0-9A-Za-z\\-]{74}'
          - '(xox[pe](?:-[0-9]{10,13}){3}-[a-zA-Z0-9-]{28,34})'
        internal: true

  - raw:
      - |
        @Host: https://slack.com:443
        POST /api/users.list?pretty=1 HTTP/1.1
        Host: slack.com
        Origin: https://api.slack.com
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryDL3VHEC7cFaxeAhK

        ------WebKitFormBoundaryDL3VHEC7cFaxeAhK
        Content-Disposition: form-data; name="content"

        null
        ------WebKitFormBoundaryDL3VHEC7cFaxeAhK
        Content-Disposition: form-data; name="token"

        {{token}}
        ------WebKitFormBoundaryDL3VHEC7cFaxeAhK--

    matchers:
      - type: dsl
        dsl:
          - status_code == 200
          - contains_all(body, "is_admin", "is_app_user", "is_email_confirmed")
          - contains(content_type, "application/json")
        condition: and

    extractors:
      - type: dsl
        dsl:
          - token
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