CVE-2016-4530 in PI SQL Data Access Server
Summary
by MITRE
OSIsoft PI SQL Data Access Server (aka OLE DB) 2016 1.5 allows remote authenticated users to cause a denial of service (service outage and data loss) via a message.
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Analysis
by VulDB Data Team • 01/31/2019
The vulnerability identified as CVE-2016-4530 affects OSIsoft PI SQL Data Access Server version 2016 1.5, which is part of the broader OSIsoft PI System suite used extensively in industrial control systems and operational technology environments. This server component provides OLE DB connectivity for accessing process information data, making it a critical element in industrial automation and monitoring systems. The flaw exists within the message handling mechanism of the OLE DB interface, specifically in how the system processes incoming messages from authenticated users.
The technical implementation of this vulnerability stems from inadequate input validation and error handling within the message processing pipeline of the PI SQL Data Access Server. When authenticated users send specially crafted messages to the server, the system fails to properly validate or sanitize these inputs before processing them. This leads to a condition where the server becomes unresponsive or crashes entirely, resulting in a denial of service state that can persist until manual intervention or system restart occurs. The vulnerability is particularly concerning because it requires only authentication credentials to exploit, meaning that an attacker with legitimate access rights could potentially disrupt critical industrial operations.
The operational impact of this vulnerability extends beyond simple service disruption to include potential data loss scenarios within industrial environments. When the PI SQL Data Access Server becomes unavailable due to this denial of service condition, it can interrupt data collection, monitoring, and reporting functions that are fundamental to operational technology systems. The data loss component of this vulnerability occurs because the server may not properly handle the message processing errors, potentially causing data corruption or loss during the crash recovery process. This risk is particularly significant in environments where continuous data flow is essential for safety systems, process control, and regulatory compliance requirements.
Organizations should implement multiple layers of mitigation strategies to address this vulnerability effectively. The primary recommendation involves applying the vendor-provided security patches and updates that specifically address this denial of service condition. Network segmentation and access control measures should be enhanced to limit the number of authenticated users who can access the PI SQL Data Access Server directly. Implementing monitoring solutions that can detect unusual message patterns or service disruptions can provide early warning of potential exploitation attempts. Additionally, regular backup and recovery procedures should be validated to ensure that data loss scenarios can be effectively managed when such vulnerabilities are exploited. This vulnerability aligns with CWE-400, which covers "Uncontrolled Resource Consumption," and represents a specific implementation weakness in the OLE DB interface that could be exploited by attackers following ATT&CK technique T1499, which involves network denial of service attacks.