CVE-2023-28372 in FlashBlade Purity
Summary
by MITRE • 10/25/2023
A flaw exists in FlashBlade Purity (OE) Version 4.1.0 whereby a user with privileges to extend an object’s retention period can affect the availability of the object lock.
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Analysis
by VulDB Data Team • 09/20/2024
The vulnerability identified as CVE-2023-28372 resides within the FlashBlade storage system's Purity operating environment version 4.1.0, representing a significant weakness in the object lock mechanism that governs data retention policies. This flaw specifically targets the administrative functions that control how long objects remain locked, creating potential disruptions to data availability that could severely impact organizational operations. The issue manifests when authorized users attempt to extend retention periods for objects that are already subject to lock constraints, introducing a condition where the system's object lock functionality becomes compromised.
The technical nature of this vulnerability stems from inadequate validation mechanisms within the object lock extension process, allowing privilege-abuse scenarios where legitimate administrators can inadvertently or deliberately manipulate the lock state of objects. This represents a direct violation of the principle of least privilege and demonstrates a critical gap in access control enforcement for retention policies. The flaw operates at the intersection of data governance and system availability, where the extension of retention periods should maintain object integrity while preserving access availability. The vulnerability's impact extends beyond simple permission issues, as it fundamentally undermines the object lock's core purpose of ensuring data immutability during specified periods.
From an operational standpoint, this vulnerability creates substantial risk for organizations relying on FlashBlade's object lock capabilities for compliance requirements, legal holds, or regulatory data preservation. The availability impact means that objects subject to lock extensions may become inaccessible or their lock states may become inconsistent, potentially leading to data unavailability during critical business operations or legal proceedings. Security professionals should note this vulnerability's alignment with CWE-284 (Improper Access Control) and its potential mapping to ATT&CK technique T1486 (Data Encrypted for Ransom) through the disruption of data availability. The flaw essentially allows for a form of denial of service against locked objects, where the extension functionality becomes a vector for compromising the very protection it was designed to provide.
Organizations should implement immediate mitigations including restricting administrative privileges for retention extension operations, implementing additional monitoring for object lock modifications, and ensuring proper access controls are enforced through role-based access control mechanisms. The vulnerability highlights the importance of maintaining strict segregation of duties for critical data protection functions and underscores the necessity of regular security assessments of storage system management interfaces. System administrators should also consider implementing automated alerting for any retention period extensions that exceed predefined thresholds or occur outside normal business hours. The remediation process requires careful coordination with vendor support to ensure proper patching of the Purity operating environment while maintaining system stability during the update process.