CVE-2018-5489 in 7-Mode Transition Tool
Summary
by MITRE
NetApp 7-Mode Transition Tool allows users with valid credentials to access functions and information which may have been intended to be restricted to administrators or privileged users. 7MTT versions below 2.0 do not enforce user authorization rules on file information and status that it has previously collected. The released version of 7MTT has been updated to maintain and verify authorization rules for file information, status and utilities.
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Analysis
by VulDB Data Team • 03/13/2020
The CVE-2018-5489 vulnerability affects the NetApp 7-Mode Transition Tool version 2.0 and earlier, representing a significant authorization bypass flaw that undermines the security model of the transition utility. This vulnerability specifically targets the 7-Mode Transition Tool which serves as a critical component in migrating storage environments from NetApp's legacy 7-mode architecture to newer cluster-mode systems. The flaw stems from inadequate enforcement of user authorization rules within the tool's operational framework, creating a scenario where legitimate users with valid credentials can access restricted administrative functions and sensitive information that should be limited to privileged personnel only.
The technical implementation of this vulnerability lies in the failure of the 7MTT tool to properly validate user permissions when accessing file information and status data that it has previously collected during the transition process. This authorization bypass occurs at the application level where the tool does not maintain proper access controls or verify user privileges before granting access to sensitive operational data. The flaw essentially creates a privilege escalation pathway where standard users can potentially access administrative functions and file status information that should be restricted to authorized administrators. This represents a classic case of insufficient access control enforcement, which falls under the CWE-285 category of Improper Authorization. The vulnerability is particularly concerning because it affects the very tool designed to facilitate secure migration processes between storage architectures, creating a potential attack surface that could be exploited to gain unauthorized access to critical storage information.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable more serious security compromises within NetApp storage environments. An attacker with valid credentials could leverage this flaw to access detailed file status information, potentially uncovering sensitive data about storage operations, file permissions, and system configurations that would normally be restricted. The implications become more severe when considering that the 7MTT tool operates during critical migration phases where it has access to extensive storage metadata and system information. This vulnerability could enable attackers to gather intelligence about the target environment, potentially facilitating more sophisticated attacks or providing insights into system vulnerabilities that could be exploited in subsequent phases of an attack. The flaw also undermines the principle of least privilege that should govern access to administrative tools during critical system transitions, creating a situation where unauthorized access to sensitive operational data could occur without proper authorization checks.
Mitigation strategies for CVE-2018-5489 should focus on immediate remediation through the deployment of the updated 7MTT version 2.0 or later, which properly enforces authorization rules for file information, status, and utilities. Organizations should conduct comprehensive assessments of their existing 7MTT installations to identify systems running vulnerable versions and ensure immediate patching. Network segmentation and access control measures should be implemented to limit access to the 7MTT tool to only authorized personnel, reducing the potential impact of credential compromise. Security monitoring should be enhanced to detect unauthorized access attempts to the tool and its associated functions, with particular attention to anomalous access patterns that might indicate exploitation attempts. The vulnerability also highlights the importance of maintaining proper security controls during system transition processes, as tools designed to facilitate migrations can themselves become attack vectors if not properly secured. Organizations should implement principle of least privilege enforcement for all administrative tools and regularly audit access controls to ensure that only authorized personnel have access to sensitive operational functions. This vulnerability serves as a reminder of the critical need for proper authorization enforcement in all system components, particularly those involved in security-sensitive operations like storage migration processes. The ATT&CK framework categorizes this vulnerability under privilege escalation and credential access tactics, emphasizing the need for comprehensive security controls that protect both the tool itself and the data it accesses during critical system operations.