title: Weak Default SSL use in Port Forwarding Service
description: The Western Digital My Cloud Web App [https://os5.mycloud.com/] uses a weak SSLContext when attempting to configure port forwarding rules. This was enabled to maintain compatibility with old or outdated home routers. By using an "SSL" context instead of "TLS" or specifying stronger validation, deprecated or insecure protocols are permitted. As a result, a local user with no privileges can exploit this vulnerability and jeopardize the integrity, confidentiality and authenticity of information transmitted. The scope of impact cannot extend to other components and no user input is required to exploit this vulnerability.
problem types: CWE-757 Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
affected:
{
platforms: Linux
product: My Cloud
vendor: Western Digital
versions:
lessThan: 5.23.114, status: affected, version: My Cloud OS 5, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: LOW
baseScore: 7.3
baseSeverity: HIGH
confidentialityImpact: LOW
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
version: 3.1
]
solutions: To take advantage of the latest security fixes, Western Digital recommends that users promptly update their devices to the latest firmware by clicking on the firmware update notification.