CVE-2014-1697 in SIMATIC Wincc Open Architecture
Summary
by MITRE
The integrated web server in Siemens SIMATIC WinCC OA before 3.12 P002 January allows remote attackers to execute arbitrary code via crafted packets to TCP port 4999.
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Analysis
by VulDB Data Team • 02/01/2022
The vulnerability identified as CVE-2014-1697 resides within the integrated web server component of Siemens SIMATIC WinCC OA industrial automation software. This critical security flaw affects versions prior to 3.12 P002 January, exposing industrial control systems to remote code execution attacks. The vulnerability specifically targets TCP port 4999 which serves as the communication endpoint for the web server functionality within this industrial automation platform. Industrial environments utilizing Siemens WinCC OA systems face significant risk as this vulnerability can be exploited without authentication, making it particularly dangerous in operational technology environments where system integrity is paramount.
The technical implementation of this vulnerability stems from inadequate input validation within the web server's packet processing mechanism. When the server receives crafted packets on TCP port 4999, the malformed data triggers a buffer overflow condition or similar memory corruption vulnerability that allows attackers to inject and execute arbitrary code on the target system. This flaw represents a classic remote code execution vulnerability that operates at the network protocol level, bypassing traditional authentication mechanisms. The vulnerability's exploitation does not require user interaction or specific privileges, making it highly dangerous for industrial environments where these systems often operate with elevated privileges and critical operational functions. This type of vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and may also relate to CWE-78, concerning OS command injection vulnerabilities.
The operational impact of this vulnerability extends beyond simple code execution, as it can compromise the integrity and availability of industrial control systems. In industrial environments, WinCC OA systems control critical processes and may be connected to operational technology networks without proper segmentation. Successful exploitation could lead to complete system compromise, allowing attackers to manipulate industrial processes, access sensitive operational data, or disrupt critical infrastructure operations. The vulnerability's presence in industrial automation software increases the risk of cascading failures that could affect production processes, safety systems, and overall operational continuity. Organizations operating these systems face potential regulatory compliance issues and increased risk of cyber-attacks targeting critical infrastructure, particularly as industrial environments become increasingly connected to enterprise networks.
Organizations should immediately implement mitigation strategies including applying the vendor-provided security patches for Siemens SIMATIC WinCC OA version 3.12 P002 January or later. Network segmentation should be implemented to isolate industrial control systems from general enterprise networks, with strict firewall rules limiting access to TCP port 4999 to only trusted sources. Additional defensive measures include implementing intrusion detection systems to monitor for suspicious network traffic patterns and conducting regular security assessments of industrial control environments. The vulnerability demonstrates the importance of maintaining current security patches in industrial environments and aligns with ATT&CK technique T1210, which covers exploitation of remote services. Organizations should also consider implementing network monitoring solutions specifically designed for industrial environments to detect anomalous behavior that might indicate exploitation attempts. Regular security awareness training for industrial control system operators and administrators is essential to maintain overall security posture and prevent social engineering attacks that could complement this technical vulnerability.