CVE-2013-2829 in SCADA DNP3 OPC Server
Summary
by MITRE
MatrikonOPC SCADA DNP3 OPC Server 1.2.2.0 and earlier allows remote attackers to cause a denial of service (infinite loop) via a malformed DNP3 packet.
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Analysis
by VulDB Data Team • 02/25/2018
The vulnerability identified as CVE-2013-2829 affects MatrikonOPC SCADA DNP3 OPC Server version 1.2.2.0 and earlier, representing a critical security flaw that enables remote attackers to execute a denial of service attack through the manipulation of DNP3 protocol communications. This vulnerability specifically targets the server's handling of DNP3 packets, which are fundamental to industrial control systems and supervisory control and data acquisition environments. The DNP3 protocol serves as a communication standard for critical infrastructure systems, including power grids, water treatment facilities, and other industrial automation environments where reliable data exchange between master stations and outstations is paramount. The flaw manifests when the server processes malformed DNP3 packets that trigger an infinite loop condition within the application's packet parsing routine, effectively consuming system resources and rendering the server unavailable to legitimate users.
The technical implementation of this vulnerability stems from inadequate input validation within the DNP3 packet processing module of the MatrikonOPC server software. When a specially crafted malformed DNP3 packet is transmitted to the affected server, the parsing logic fails to properly handle the unexpected packet structure, causing the server to enter an infinite loop while attempting to process the invalid data. This condition results in continuous CPU utilization and prevents the server from processing legitimate DNP3 communications, ultimately leading to a complete denial of service for all connected industrial control systems. The vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and more specifically with CWE-835, which addresses infinite loops in software. The attack vector requires only network access to the server, making it particularly dangerous as it can be exploited from remote locations without physical access to the industrial control infrastructure.
The operational impact of this vulnerability extends beyond simple service disruption, as it poses significant risks to industrial control system reliability and operational continuity. In critical infrastructure environments where DNP3 servers facilitate communication between control centers and remote terminal units, a successful exploitation could lead to cascading failures in monitoring and control operations. The vulnerability affects the availability aspect of the CIA triad, potentially compromising the operational integrity of industrial processes that depend on continuous data flow. Organizations relying on MatrikonOPC SCADA DNP3 OPC Server implementations may experience extended downtime while recovering from the attack, potentially leading to production losses, safety hazards, and regulatory compliance issues. The attack can be executed without authentication requirements, making it particularly dangerous for environments where physical security measures may not adequately protect network-accessible industrial control systems. This vulnerability also aligns with ATT&CK technique T1499, which covers network denial of service attacks, and demonstrates how protocol-level flaws can be leveraged to compromise operational technology environments.
Mitigation strategies for this vulnerability primarily involve immediate software updates and patches provided by MatrikonOPC, as well as network-level security controls to limit access to the affected server. Organizations should implement network segmentation to isolate the DNP3 OPC server from general network access, deploy intrusion detection systems that can identify malformed DNP3 traffic patterns, and establish monitoring procedures to detect unusual CPU utilization patterns. Additional protective measures include configuring firewalls to restrict DNP3 traffic to authorized sources only, implementing network access control lists, and establishing regular vulnerability assessments targeting industrial control system components. The vulnerability also highlights the importance of secure coding practices in industrial software development, particularly around input validation and error handling in protocol parsing components. Organizations should consider implementing redundant communication paths and backup systems to maintain operational continuity in case of successful exploitation attempts. Regular security awareness training for industrial control system operators and administrators can help identify potential attack indicators and improve overall security posture in critical infrastructure environments.