title: Pre-authenticated stack overflow vulnerability on FTP Service
description: My Cloud OS 5 was vulnerable to a pre-authenticated stack overflow vulnerability on the FTP service that could be exploited by unauthenticated attackers on the network. Addressed the vulnerability by adding defenses against stack overflow issues.
problem types: CWE-121 Stack-based Buffer Overflow
affected:
{
defaultStatus: unaffected
product: My Cloud
vendor: Western Digital
versions:
lessThan: 5.19.117, status: affected, version: My Cloud OS 5, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 9.8
baseSeverity: CRITICAL
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL
solutions: Update your My Cloud device to firmware version 5.19.117.