CVE-2018-5495 in StorageGRID Webscale
Summary
by MITRE
All StorageGRID Webscale versions are susceptible to a vulnerability which could permit an unauthenticated attacker to communicate with systems on the same network as the StorageGRID Webscale Admin Node via HTTP or to take over services on the Admin Node.
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Analysis
by VulDB Data Team • 04/12/2020
The vulnerability identified as CVE-2018-5495 affects StorageGRID Webscale deployments across all versions, presenting a critical security risk that enables unauthenticated remote attackers to exploit network communication channels within the same subnet as the StorageGRID Admin Node. This flaw represents a significant deviation from standard security practices where administrative functions should require authentication and authorization controls to prevent unauthorized access to critical system components. The vulnerability specifically targets the network-level communication protocols that StorageGRID Webscale employs for internal service coordination and management operations.
The technical implementation of this vulnerability stems from insufficient access controls and authentication mechanisms within the StorageGRID Admin Node's network services. Attackers can leverage this weakness to establish unauthorized HTTP connections to systems residing on the same network segment, effectively bypassing the normal security boundaries that should protect the administrative infrastructure. This misconfiguration allows for potential reconnaissance activities where attackers can discover and interact with other network services that may not be properly secured. The vulnerability essentially creates a backdoor pathway through which malicious actors can probe the internal network topology and potentially escalate their privileges to gain control over critical administrative services.
The operational impact of CVE-2018-5495 extends beyond simple information disclosure, as it provides attackers with the capability to take over administrative services on the StorageGRID Admin Node itself. This service takeover could result in complete compromise of the StorageGRID deployment, enabling attackers to modify storage configurations, access sensitive data, or disrupt critical storage operations. The attack surface is particularly concerning because the StorageGRID Admin Node typically serves as the central management point for storage grid operations, making it a prime target for adversaries seeking to gain comprehensive control over the storage infrastructure. This vulnerability directly violates fundamental security principles of least privilege and network segmentation that are essential for protecting enterprise storage environments.
Mitigation strategies for this vulnerability should focus on implementing robust network segmentation controls and access restriction mechanisms. Organizations should deploy network access control lists to prevent unauthorized communication between the StorageGRID Admin Node and other systems on the same network segment. The implementation of proper authentication and authorization protocols for all administrative services represents a critical remediation step that aligns with industry standards such as those recommended in the CWE-284 weakness category, which addresses improper access control. Network monitoring and intrusion detection systems should be configured to detect unusual HTTP traffic patterns originating from the StorageGRID Admin Node, providing visibility into potential exploitation attempts. Additionally, regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in network service configurations, ensuring compliance with security frameworks such as those outlined in the MITRE ATT&CK matrix for cloud and storage environments.
The vulnerability demonstrates the importance of securing administrative interfaces even within protected network environments, as traditional perimeter-based security models may not adequately protect against internal threats. Organizations should consider implementing zero-trust network architectures where every access attempt, regardless of source location, requires verification and authorization. The remediation process should include comprehensive network audits to identify all services running on the StorageGRID Admin Node and ensure that only necessary ports and protocols are exposed to network traffic. Regular patch management and security updates should be prioritized to address similar vulnerabilities in network service implementations across the enterprise infrastructure.