CVE-2020-4348 in Spectrum Scale
Summary
by MITRE
IBM Spectrum Scale 4.2.0.0 through 4.2.3.21 and 5.0.0.0 through 5.0.4.4 could allow an authenticated GUI user to perform unauthorized actions due to missing function level access control. IBM X-Force ID: 178414
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Analysis
by VulDB Data Team • 10/19/2020
IBM Spectrum Scale represents a distributed file system platform that manages large-scale storage environments across enterprise networks. The vulnerability in question affects versions 4.2.0.0 through 4.2.3.21 and 5.0.0.0 through 5.0.4.4 of this software, specifically targeting the graphical user interface component. This issue manifests as a missing function level access control flaw that allows authenticated users to execute unauthorized actions within the system. The vulnerability stems from inadequate authorization checks within the web interface, permitting users who have logged in to perform operations they should not be permitted to access based on their assigned roles and permissions.
The technical implementation of this vulnerability involves insufficient validation of user privileges at the function level within the GUI subsystem. When users authenticate to the Spectrum Scale management interface, the system fails to properly verify whether they possess the necessary authorization levels to execute specific administrative functions. This weakness creates a path for privilege escalation where authenticated users can potentially access and manipulate system resources beyond their intended access boundaries. The flaw operates at the application layer and specifically impacts the web-based management console rather than the underlying storage infrastructure itself. According to CWE standards, this vulnerability maps to CWE-285, which addresses improper authorization issues in software systems. The attack vector requires an authenticated user context, making it a low-severity issue from a network perspective but potentially critical from an insider threat standpoint.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential system compromise and data integrity risks. An attacker with legitimate login credentials could exploit this weakness to perform administrative functions such as modifying cluster configurations, accessing sensitive system information, or manipulating storage resources. This could lead to system instability, data corruption, or unauthorized data access patterns that might go undetected for extended periods. Organizations relying on Spectrum Scale for critical storage operations face potential business disruption if this vulnerability is exploited, particularly in environments where multiple users have varying levels of access privileges. The issue also creates compliance challenges for organizations subject to regulatory requirements that mandate strict access controls and audit trails.
Mitigation strategies for this vulnerability should focus on immediate patch application from IBM, which would address the missing authorization checks in the GUI components. Organizations should also implement additional monitoring of administrative activities within the Spectrum Scale environment to detect unauthorized access patterns. Network segmentation and role-based access control enhancements can provide additional defense layers beyond the software fix. Security teams should conduct comprehensive access reviews to ensure that user permissions align with their operational requirements and that no users possess unnecessary administrative privileges. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting the T1078 credential reuse and T1548 legitimate credentials exploitation tactics. Regular security assessments of the GUI components and implementation of automated access control validation should be part of ongoing security operations to prevent similar issues from emerging in other system components.