CVE-2015-4545 in Isilon OneFS
Summary
by MITRE
EMC Isilon OneFS 7.1 before 7.1.1.8, 7.2.0 before 7.2.0.4, and 7.2.1 before 7.2.1.1 allows remote authenticated administrators to bypass a SmartLock root-login restriction by creating a root account and establishing a login session.
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Analysis
by VulDB Data Team • 11/24/2024
The vulnerability identified as CVE-2015-4545 affects EMC Isilon OneFS storage systems across multiple version ranges, specifically impacting releases 7.1 before 7.1.1.8, 7.2.0 before 7.2.0.4, and 7.2.1 before 7.2.1.1. This security flaw represents a critical authorization bypass issue within the SmartLock feature designed to protect root login access on enterprise storage infrastructure. The vulnerability specifically targets authenticated administrators who possess administrative privileges within the system, creating a scenario where legitimate users can circumvent intended security controls. The SmartLock mechanism was implemented to prevent unauthorized root access by restricting direct root login sessions, particularly in environments where multiple administrators manage storage systems. This restriction serves as a fundamental security control to prevent privilege escalation and unauthorized system access. The flaw allows attackers with administrative credentials to create new root accounts and subsequently establish login sessions that bypass the SmartLock restrictions, effectively undermining the intended access controls.
The technical implementation of this vulnerability stems from insufficient validation of account creation and session establishment processes within the Isilon OneFS authentication framework. When administrators create new root accounts through the system's administrative interface, the underlying code fails to properly enforce the SmartLock restrictions that should prevent direct root login sessions. This oversight creates a path where authenticated users can manipulate the system's access controls by leveraging legitimate administrative privileges to establish root sessions. The vulnerability operates at the authentication and authorization layer of the system, where the boundary between administrative privileges and root access should remain strictly enforced. The flaw essentially allows for a privilege escalation attack vector where administrative users can bypass the intended security controls that prevent direct root login sessions. This represents a failure in the principle of least privilege enforcement, where the system should prevent the creation of direct root login sessions regardless of the user's administrative status.
The operational impact of CVE-2015-4545 extends beyond simple access control bypass to potentially enable more severe security compromises within enterprise storage environments. Organizations relying on EMC Isilon systems for critical data storage face significant risk when this vulnerability remains unpatched, as it provides a pathway for malicious administrators or compromised accounts to gain elevated privileges without proper authorization controls. The vulnerability is particularly concerning in environments where multiple administrators manage storage systems, as it could allow an attacker to create root accounts and establish persistent access to the system. This threat scenario aligns with attack patterns documented in the MITRE ATT&CK framework under the privilege escalation category, specifically targeting the 'Abuse Elevation Control Mechanisms' technique. The impact is further amplified by the fact that this affects enterprise-grade storage systems that often contain sensitive organizational data, making the potential for data compromise or system disruption significant. Organizations with multiple administrators may find their security posture weakened as a single compromised administrative account could be used to establish persistent root access.
Organizations should implement immediate mitigations including applying the vendor-provided patches for the affected Isilon OneFS versions, which address the authorization bypass by strengthening account creation and session establishment validation. System administrators should also implement additional monitoring controls to detect unauthorized account creation or unusual root login patterns, particularly focusing on sessions that bypass SmartLock restrictions. The vulnerability aligns with CWE-285, which addresses improper authorization in authentication mechanisms, and represents a failure in access control enforcement. Security teams should review and audit existing administrative account configurations to ensure that only necessary administrative privileges are granted and that all account creation processes are properly monitored. Additionally, implementing network segmentation and limiting administrative access to specific IP addresses can help reduce the attack surface. Organizations should also consider implementing multi-factor authentication for administrative accounts and establishing strict change management procedures for account creation and privilege modifications. The remediation approach should include comprehensive testing of the patched versions to ensure that legitimate administrative functions remain operational while the vulnerability is properly addressed. This vulnerability highlights the critical importance of maintaining up-to-date security patches and the potential consequences of failing to address authentication bypass issues in enterprise storage systems.