Miniflare vulnerable to Server-Side Request Forgery (SSRF)

2023-12-2919:36:41

CWE-918

GitHub Advisory Database

github.com

miniflare

server-side request forgery

http requests

websocket requests

vulnerability

patch

workaround

cloudflare.

CVSS3

8.1

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

AI Score

Confidence

Low

EPSS

0.001

Percentile

17.0%

JSON

Impact

Sending specially crafted HTTP requests to Miniflare’s server could result in arbitrary HTTP and WebSocket requests being sent from the server. If Miniflare was configured to listen on external network interfaces (as was the default in wrangler until 3.19.0), an attacker on the local network could access other local servers.

Patches

The issue was fixed in [email protected].

Workarounds

Ensure Miniflare is configured to listen on just local interfaces. This is the default behaviour, but can also be configured with the host: "127.0.0.1" option.