CVE-2023-3188

published 2023-06-10

CVE-2023-3188: Server-Side Request Forgery (SSRF) in GitHub repository owncast/owncast prior to 0.1.0.

Priority P3 42 medium 6.5 CVSS 3.1

AV N AC L PR N UI N S U C L I L A N

EXPLOIT

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

Affected

2 ranges

Vendor	Product	Version range	Fixed in
owncast	owncast_owncast	>= unspecified < 0.1.0	0.1.0
owncast_project	owncast	< 0.1.0	0.1.0

Detection & IOCs extracted from sources · hover to see the quote

url POST /api/remotefollow HTTP/1.1↗

path /api/remotefollow↗

• → SSRF is triggered via a POST request to /api/remotefollow with a crafted 'account' parameter containing an attacker-controlled domain (e.g., OOB/interactsh URL). Monitor for outbound HTTP/DNS requests originating from the Owncast server process following such requests. ↗
• → A successful exploitation attempt returns a JSON response body containing both 'success":' and 'message":' keys with Content-Type application/json. Detect exploit attempts by alerting on POST /api/remotefollow requests where the account field contains an external or internal hostname. ↗
• → The vulnerability is unauthenticated (PR:N). No authentication headers are required to trigger the SSRF via the remotefollow endpoint. ↗
• → Confirm OOB interaction over both HTTP and DNS protocols as indicators of successful SSRF exploitation. ↗

• · Affected versions are Owncast prior to 0.1.0. The SSRF endpoint /api/remotefollow is only present in vulnerable versions; upgrading to 0.1.0+ mitigates the issue. ↗

CVSS provenance

nvd v3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

nvd v3.0 8.3 HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

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