CVE-2022-36331 in My Cloud OS
Summary
by MITRE • 06/12/2023
Western Digital My Cloud, My Cloud Home, My Cloud Home Duo, and SanDisk ibi devices were vulnerable to an impersonation attack that could allow an unauthenticated attacker to gain access to user data. This issue affects My Cloud OS 5 devices: before 5.25.132; My Cloud Home and My Cloud Home Duo: before 8.13.1-102; SanDisk ibi: before 8.13.1-102.
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Analysis
by VulDB Data Team • 07/08/2023
The vulnerability identified as CVE-2022-36331 represents a critical authentication flaw affecting several Western Digital and SanDisk network-attached storage devices. This security weakness stems from inadequate session management and authentication mechanisms that permit unauthorized actors to impersonate legitimate users within the device ecosystem. The affected products include My Cloud OS 5 devices prior to version 5.25.132, My Cloud Home and My Cloud Home Duo models before firmware version 8.13.1-102, and SanDisk ibi devices with the same firmware limitations. The vulnerability creates a pathway for unauthenticated attackers to access sensitive user data stored on these network-attached storage systems.
The technical implementation of this flaw involves improper validation of authentication tokens and session identifiers within the device's web interface and API endpoints. Attackers can exploit this weakness by crafting malicious requests that bypass standard authentication procedures, effectively allowing them to establish unauthorized sessions with elevated privileges. This type of vulnerability falls under the CWE-287 category, which encompasses improper authentication issues, and aligns with ATT&CK technique T1110.003 for credential access through exploitation of weak authentication mechanisms. The vulnerability exists in the device's authentication flow where session tokens are not properly validated or refreshed, creating persistent access opportunities for malicious actors who can reuse or predict valid session identifiers.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it fundamentally compromises the data integrity and confidentiality assurances that users expect from their network storage solutions. Organizations and individuals utilizing these devices face significant risks including data exfiltration, unauthorized data modification, and potential system compromise that could serve as a foothold for broader network infiltration. The vulnerability affects not just individual consumer users but also small businesses that rely on these devices for data storage and backup operations, potentially exposing sensitive corporate information or intellectual property. Attackers could leverage this weakness to perform reconnaissance activities, establish persistent access points, or conduct more sophisticated attacks leveraging the compromised device as a pivot point within larger network environments.
Mitigation strategies for this vulnerability require immediate firmware updates to the affected versions specified in the advisory, which address the authentication flaws through proper session token management and strengthened authentication protocols. System administrators should also implement network segmentation to limit access to these storage devices, disable unnecessary services, and monitor network traffic for suspicious authentication patterns. Additional protective measures include enforcing strong access controls, regularly auditing user accounts, and implementing network monitoring solutions to detect anomalous authentication behavior. Organizations should also consider deploying intrusion detection systems that can identify potential exploitation attempts and maintain comprehensive backup strategies to ensure data recovery capabilities in case of successful compromise. The vulnerability demonstrates the critical importance of maintaining up-to-date firmware and implementing robust authentication security measures in network-attached storage environments to prevent unauthorized access to sensitive data assets.