CVE-2018-13319 in Control
Summary
by MITRE
Incorrect access control in get_portal_info in Buffalo TS5600D1206 version 3.61-0.10 allows attackers to determine sensitive device information via an unauthenticated POST request.
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Analysis
by VulDB Data Team • 04/14/2020
The vulnerability identified as CVE-2018-13319 represents a critical access control flaw in Buffalo's TS5600D1206 network attached storage device running firmware version 3.61-0.10. This issue resides within the get_portal_info function which is designed to provide portal information to authorized users but fails to properly validate authentication status. The flaw allows unauthenticated attackers to exploit this function through a simple POST request, bypassing the intended security controls that should restrict access to sensitive device information. This misconfiguration creates a significant security risk as it enables remote attackers to gather detailed system information without requiring any credentials or prior authorization.
The technical implementation of this vulnerability stems from inadequate input validation and authentication checks within the web application layer of the Buffalo device. When an attacker sends an unauthenticated POST request to the get_portal_info endpoint, the system fails to verify the legitimacy of the requestor before returning sensitive information. This represents a classic authorization bypass vulnerability that falls under the CWE-285 category of improper authorization, where the system does not properly enforce access controls for protected resources. The flaw demonstrates poor security architecture where the application assumes that legitimate requests come from authenticated users without proper verification mechanisms.
The operational impact of this vulnerability extends beyond simple information disclosure, as the sensitive data exposed can include system configuration details, firmware versions, network settings, and potentially user account information. Attackers can leverage this information to conduct further reconnaissance activities, identify potential attack vectors, and plan more sophisticated attacks against the device or network. The vulnerability particularly affects organizations using Buffalo TS5600D1206 devices in enterprise environments where such information disclosure could lead to privilege escalation attempts or targeted attacks against the storage infrastructure. This type of vulnerability aligns with ATT&CK technique T1083 (File and Directory Discovery) as attackers can systematically gather information about the target system's configuration and structure.
Organizations should implement immediate mitigations including firmware updates from Buffalo to address the specific access control flaw, network segmentation to limit access to storage devices, and proper firewall rules to restrict access to the affected endpoints. The vulnerability also highlights the importance of conducting regular security assessments and penetration testing to identify similar authorization bypass issues in networked storage systems. Additionally, implementing proper logging and monitoring of access attempts to sensitive endpoints can help detect exploitation attempts and provide early warning of potential security incidents. The affected devices should be isolated from untrusted networks until proper security measures are implemented, and security teams should monitor for any signs of exploitation attempts targeting this specific vulnerability.