CVE-2018-1783 in Spectrum Scale
Summary
by MITRE
IBM GPFS (IBM Spectrum Scale 4.1.1.0, 4.1.1.20, 4.2.0.0, 4.2.3.10, 5.0.0 and 5.0.1.2) command line utility allows an unprivileged, authenticated user with access to a GPFS node to forcefully terminate GPFS and deny access to data available through GPFS. IBM X-Force ID: 148806.
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Analysis
by VulDB Data Team • 05/23/2023
The vulnerability identified as CVE-2018-1783 affects IBM General Parallel File System (GPFS) versions 4.1.1.0, 4.1.1.20, 4.2.0.0, 4.2.3.10, 5.0.0, and 5.0.1.2, representing a critical security flaw in the command line utility interface of IBM Spectrum Scale. This issue stems from insufficient privilege validation mechanisms within the system's administrative commands, allowing unprivileged users who have authenticated access to a GPFS node to execute forceful termination commands that can disrupt the entire file system service. The vulnerability operates through the exploitation of improper access control checks that should normally restrict such destructive operations to authorized administrative users only, creating a scenario where any authenticated user with node-level access can compromise the availability of data services across the entire GPFS cluster.
The technical flaw manifests in the command line utility's failure to properly validate user privileges before executing critical system termination commands. When an authenticated user invokes specific administrative commands through the GPFS interface, the system does not adequately verify whether the requesting user possesses the necessary elevated privileges required for such operations. This privilege escalation vulnerability falls under the CWE-284 access control weakness category, specifically addressing inadequate privilege checking mechanisms that permit unauthorized users to perform operations typically restricted to administrators. The flaw essentially allows a user to bypass normal security controls and execute commands that would normally require root or administrative privileges, creating a pathway for denial of service attacks against the entire file system infrastructure.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass complete service disruption and data availability compromise. An unprivileged user who gains access to any GPFS node can potentially terminate the file system services, rendering all data accessible through GPFS unavailable to legitimate users and applications. This creates a severe denial of service condition that can affect business operations, data integrity, and system availability, particularly in environments where GPFS serves as the primary storage solution for critical applications. The attack vector is particularly concerning because it requires only authenticated access to a single node, making it accessible to users who may have legitimate access for other purposes but lack authorization to perform destructive operations. This vulnerability directly aligns with ATT&CK technique T1499.004 which covers the use of system shutdown/reboot to deny service.
Organizations running affected IBM GPFS versions face significant security implications as this vulnerability can be exploited by both internal and external threat actors who gain access to any GPFS node through legitimate means. The remediation strategy should focus on immediate patch application from IBM to address the privilege validation flaw, along with implementing network segmentation and access controls to limit node-level access to authorized personnel only. Additional mitigations include monitoring for unauthorized execution of administrative commands, implementing least privilege access models for GPFS node access, and conducting regular security audits of GPFS configurations. The vulnerability demonstrates the critical importance of proper privilege validation in distributed file systems where unauthorized termination of core services can have cascading effects across entire enterprise storage infrastructures, emphasizing the need for robust access control mechanisms and regular security assessments of critical system components.