CVE-2020-28971 – Western Digital MyCloud PR4100 nasAdmin Authentication Bypass Vulnerability

https://notcve.org/view.php?id=CVE-2020-28971

An issue was discovered on Western Digital My Cloud OS 5 devices before 5.06.115. A NAS Admin authentication bypass vulnerability could allow an unauthenticated user to execute privileged commands on the device via a cookie, because of insufficient validation of URI paths. Se detectó un problema en los dispositivos Western Digital My Cloud OS versiones 5 anteriores a 5.06.115. Una vulnerabilidad de omisión de autenticación de administrador de NAS podría permitir a un usuario no autenticado ejecutar comandos privilegiados en el dispositivo por medio de una cookie, debido a una comprobación insuficiente de las rutas del URI This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Western Digital MyCloud PR4100. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the nasAdmin service, which listens on TCP port 80 and 443 by default. • https://support.wdc.com/downloads.aspx?g=907&lang=en#downloads https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115 https://www.zerodayinitiative.com/advisories/ZDI-20-1447 • CWE-287: Improper Authentication •