CVE-2018-1353 in FortiManager
Summary
by MITRE
An information disclosure vulnerability in Fortinet FortiManager 6.0.1 and below versions allows a standard user with adom assignment read the interface settings of vdoms unrelated to the assigned adom.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 03/20/2020
The vulnerability identified as CVE-2018-1353 represents a critical information disclosure flaw within Fortinet FortiManager systems running version 6.0.1 or earlier. This security weakness specifically affects the access control mechanisms implemented within the FortiManager administrative domain (adom) and virtual domain (vdom) architecture. The vulnerability arises from insufficient authorization checks that permit standard users to bypass normal security boundaries and access sensitive configuration data from vdoms that are not assigned to their administrative domain. This represents a fundamental breakdown in the principle of least privilege that is essential for network security management platforms.
The technical implementation of this vulnerability stems from improper access validation within the FortiManager's user privilege system. When a standard user attempts to access vdom interface settings, the system fails to properly verify whether the requesting user has legitimate authorization to view the target vdom configuration. This flaw exists at the application layer where the FortiManager web interface processes requests for vdom information. The vulnerability is particularly concerning because it operates at the administrative interface level, where users with basic read permissions can escalate their access to view configuration data from multiple vdoms simultaneously. This issue is categorized under CWE-284, which describes improper access control, and aligns with ATT&CK technique T1087.001 for account access removal and T1566.001 for credential access through unauthorized system access.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable attackers to gather comprehensive network topology information, interface configurations, and potentially sensitive network parameters from multiple vdoms. An attacker with access to a standard user account within an assigned adom could leverage this vulnerability to map out the entire network infrastructure managed by the FortiManager, including interfaces that may contain sensitive routing information, IP address ranges, or network segmentation details. This information disclosure can significantly aid in planning subsequent attacks, as it provides attackers with detailed knowledge of network architecture that would normally be restricted to privileged administrators. The vulnerability essentially allows lateral movement within the FortiManager environment and can be exploited to gain insights into network security controls that should remain isolated.
Organizations utilizing FortiManager versions 6.0.1 or earlier should immediately implement mitigations to address this vulnerability. The primary remediation involves upgrading to FortiManager version 6.0.2 or later, which includes proper access control enforcement for vdom interface settings. Additionally, administrators should review and tighten user permissions within their FortiManager environments, ensuring that users are assigned to specific adoms with minimal required privileges. Network segmentation strategies should be reinforced to limit the scope of potential impact from compromised accounts. Security monitoring should be enhanced to detect unauthorized access attempts to vdom configurations, particularly when users attempt to access resources outside their assigned administrative domains. This vulnerability highlights the importance of maintaining current security patches and implementing robust access control policies within centralized network security management platforms.