CVE-2014-5876 in WD My Cloud
Summary
by MITRE
The WD My Cloud (aka com.wdc.wd2go) application 4.0.0 for Android does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
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Analysis
by VulDB Data Team • 09/04/2024
The vulnerability identified as CVE-2014-5876 represents a critical security flaw in the WD My Cloud application version 4.0.0 for Android devices. This application, designed to facilitate remote access to Western Digital My Cloud storage devices, implements insecure SSL certificate verification mechanisms that create significant attack vectors for malicious actors. The flaw specifically affects the application's inability to properly validate X.509 certificates presented by SSL servers during secure communication establishment, fundamentally undermining the cryptographic security assurances that SSL/TLS protocols are designed to provide.
The technical implementation of this vulnerability stems from the application's failure to perform proper certificate chain validation and hostname verification during SSL handshake procedures. When the WD My Cloud application establishes connections to remote servers, it accepts any certificate presented without verifying its authenticity through trusted certificate authorities or checking that the certificate's subject matches the target server's hostname. This absence of certificate validation creates a man-in-the-middle attack scenario where attackers can intercept communications by presenting fraudulent certificates that appear legitimate to the vulnerable application. The flaw operates at the transport layer security validation level, specifically within the SSL/TLS certificate verification process, making it particularly dangerous as it affects all network communications between the mobile application and remote storage servers.
The operational impact of this vulnerability extends beyond simple data interception to encompass complete compromise of user data confidentiality and integrity. Attackers exploiting this weakness can gain access to sensitive information including user credentials, personal files stored on remote cloud services, and potentially other connected network resources. The vulnerability affects users who rely on the WD My Cloud application for remote file access, storage management, and backup operations, potentially exposing personal documents, photos, videos, and business-critical data to unauthorized access. This flaw is particularly concerning given the nature of cloud storage applications, where users typically store valuable personal and professional information that could be monetized through theft or used for identity fraud and other malicious activities.
Security professionals should note that this vulnerability aligns with CWE-295, which specifically addresses "Improper Certificate Validation," and represents a classic example of insecure communication implementation that violates fundamental security principles. From an adversarial perspective, this vulnerability maps directly to ATT&CK technique T1041, which covers "Exfiltration Over Command and Control Channel," as attackers can leverage the insecure connections to exfiltrate data from compromised systems. The vulnerability also relates to T1566, "Phishing," as attackers can use the man-in-the-middle capabilities to create convincing phishing scenarios by presenting fraudulent certificates that appear legitimate to users. Organizations and individual users should immediately implement mitigations including updating to patched versions of the WD My Cloud application, implementing network monitoring to detect unusual certificate behavior, and considering temporary workarounds such as using VPN connections to add an additional layer of security between mobile devices and cloud services. The vulnerability demonstrates the critical importance of proper certificate validation in mobile applications and highlights the need for comprehensive security testing of SSL/TLS implementations in all networked applications.