For My Cloud Devices:

For more information on the latest security updates, see the release notes. For My Cloud OS 5 devices, Western Digital recommends that users promptly update their devices to the latest firmware by clicking on the firmware update notification.

For My Cloud Home and SanDisk ibi Devices:

For more information on the latest security updates, see the release notes. My Cloud Home, My Cloud Home Duo and SanDisk ibi devices will be automatically updated to reflect the latest firmware version

Advisory Summary

Addressed a server-side request forgery vulnerability by fixing DNS addresses that refer to loopback. This could allow a rogue server on the local network to modify its URL using another DNS address to point back to the loopback adapter. This could then allow the URL to exploit other vulnerabilities on the local server.

CVE Number: CVE-2023-22817

Reported By: Sam Thomas (@_s_n_t) of Pentest Ltd (@pentestltd) working with Trend Micro’s Zero Day Initiative