CVE-2014-4632 in vSphere Data Protection
Summary
by MITRE
VMware vSphere Data Protection (VDP) 5.1, 5.5 before 5.5.9, and 5.8 before 5.8.1 and the proxy client in EMC Avamar Data Store (ADS) and Avamar Virtual Edition (AVE) 6.x and 7.0.x do not properly verify X.509 certificates from vCenter Server SSL servers, which allows man-in-the-middle attackers to spoof servers, and bypass intended backup and restore access restrictions, via a crafted certificate.
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Analysis
by VulDB Data Team • 03/08/2022
The vulnerability identified as CVE-2014-4632 represents a critical certificate verification flaw within VMware vSphere Data Protection and EMC Avamar backup solutions. This weakness stems from inadequate X.509 certificate validation mechanisms that fail to properly authenticate vCenter Server SSL connections, creating a significant security gap in enterprise backup and recovery operations. The vulnerability affects multiple versions of VMware vSphere Data Protection including 5.1 and 5.5 before specific patches, as well as EMC Avamar Data Store and Avamar Virtual Edition versions 6.x and 7.0.x, making it a widespread concern across hybrid cloud and virtualized environments.
The technical flaw manifests in the improper certificate verification process where the affected systems accept certificates without sufficient validation of their authenticity and trust chain. This vulnerability aligns with CWE-295, which specifically addresses "Improper Certificate Validation," and represents a classic man-in-the-middle attack vector. Attackers can exploit this weakness by presenting forged certificates that appear legitimate to the backup systems, thereby gaining unauthorized access to backup operations and potentially bypassing access controls that are meant to protect sensitive data. The flaw essentially allows adversaries to establish false trust relationships with the backup infrastructure, undermining the security controls designed to protect data integrity and access.
The operational impact of this vulnerability extends beyond simple authentication bypass, as it fundamentally compromises the integrity of backup and restore operations within enterprise environments. Organizations utilizing affected versions of vSphere Data Protection and Avamar systems face the risk of unauthorized data access, potential data exfiltration, and complete bypass of access restrictions that are critical for maintaining data security policies. This vulnerability can be exploited to perform unauthorized backup operations, restore malicious data into production environments, or gain access to backup repositories that contain sensitive corporate information. The implications are particularly severe in regulated environments where backup data often contains personally identifiable information, financial records, or other sensitive data requiring strict access controls.
From an adversarial perspective, this vulnerability maps directly to ATT&CK technique T1566.001 for "Phishing: Spearphishing Attachment" and T1071.001 for "Application Layer Protocol: Web Protocols" as attackers can leverage the certificate forgery to establish malicious connections. The vulnerability also relates to T1555.003 for "Credentials from Password Stores: Password Managers" and T1021.001 for "Remote Services: Remote Desktop Protocol" in scenarios where backup systems interact with virtualized environments. Organizations should prioritize patching affected systems as this vulnerability can be exploited without requiring privileged access, making it particularly dangerous for environments with limited security monitoring capabilities.
The recommended mitigation strategy involves immediate deployment of vendor patches for all affected versions of VMware vSphere Data Protection and EMC Avamar systems. Organizations should also implement additional monitoring controls to detect anomalous certificate usage patterns and establish more robust certificate management policies. Network segmentation and additional authentication layers should be considered as compensating controls while patches are deployed. Security teams should conduct comprehensive vulnerability assessments to identify all systems running affected software versions and establish certificate validation monitoring procedures that can detect certificate anomalies in real-time. The vulnerability demonstrates the critical importance of proper certificate validation in security-critical systems and highlights the need for robust cryptographic practices in backup and recovery infrastructure.