CVE-2022-26505

What it actually does

DNS rebinding vulnerability allows a remote web server to bypass same-origin policy restrictions and exfiltrate media files from the affected media server.

Why it matters to the business

Media files stored on the server can be stolen by attackers, resulting in unauthorized data exposure and potential loss of sensitive content with moderate urgency given the age of the issue and low exploit probability.

How an attack unfolds

An attacker hosts a malicious web page that leverages DNS rebinding techniques to make a victim's browser resolve and connect to the media server, bypassing browser protections to access and exfiltrate media files.

How to fix it

Upgrade ReadyMedia (MiniDLNA) to version 1.3.1 or later. Apply the listed fixed commits for any downstream nextauthjs/next-auth components if present in the environment.

How to confirm the fix worked

Verify the installed version of ReadyMedia is 1.3.1 or newer; test by attempting DNS rebinding from a controlled browser environment to confirm the issue is resolved.

Typical attack path

1. Attacker registers a domain and configures DNS for rebinding
2. Victim is lured to visit the attacker's malicious web page
3. Browser performs rebinding to resolve to the target media server
4. Requests are issued to the media server to retrieve and exfiltrate files

How to detect it

Review web server and DNS logs for unusual rebinding patterns or unexpected requests originating from external domains; check browser histories or proxy logs for connections to the media server from suspicious sources.

What your security team should do

• Prioritize upgrade of all instances to the fixed version within standard patching cycles
• Review network segmentation to limit exposure of media servers to untrusted browsers
• Monitor EPSS score for any upward trend indicating increased exploitation risk