CVE-2012-4356 in Winlog Pro
Summary
by MITRE
Multiple directory traversal vulnerabilities in Sielco Sistemi Winlog Pro SCADA before 2.07.17 and Winlog Lite SCADA before 2.07.17 allow remote attackers to read arbitrary files via port-46824 TCP packets specifying a file-open operation with opcode 0x78 and a .. (dot dot) in a pathname, followed by a file-read operation with opcode (1) 0x96, (2) 0x97, or (3) 0x98.
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Analysis
by VulDB Data Team • 07/28/2025
The CVE-2012-4356 vulnerability represents a critical directory traversal flaw affecting Sielco Sistemi's Winlog Pro and Winlog Lite SCADA systems prior to version 2.07.17. This vulnerability resides within the network communication protocol implementation of these industrial control systems, specifically targeting the TCP port 46824 which serves as the primary communication channel for SCADA operations. The flaw enables remote attackers to manipulate file access operations through carefully crafted network packets that exploit the lack of proper input validation in the pathname handling mechanism. The vulnerability manifests when an attacker sends a file-open operation with opcode 0x78 followed by a .. (dot dot) sequence in the pathname, which then allows subsequent file-read operations using opcodes 0x96, 0x97, or 0x98 to access arbitrary files on the system.
The technical exploitation of this vulnerability stems from insufficient validation of pathname components within the SCADA communication protocol implementation. When the system receives a file-open command with opcode 0x78 containing directory traversal sequences, it fails to properly sanitize the input before processing the file access request. This allows attackers to navigate beyond the intended directory boundaries and access files that should remain restricted, potentially including system configuration files, user credentials, or sensitive operational data. The vulnerability directly maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The attack vector is particularly dangerous in industrial environments as it can be executed remotely without requiring physical access or authentication, making it a significant threat to operational technology infrastructure.
The operational impact of this vulnerability extends beyond simple unauthorized file access, potentially compromising the integrity and confidentiality of critical industrial processes. Attackers could access sensitive operational data, configuration files containing system credentials, or even system binaries that could facilitate further exploitation. The SCADA environment's reliance on these systems for critical infrastructure control makes this vulnerability particularly dangerous, as unauthorized access could potentially disrupt industrial operations or provide attackers with information to plan more sophisticated attacks. This vulnerability aligns with ATT&CK technique T1566, which covers phishing with a malicious attachment, but in this case the attack vector is network-based rather than email-based, representing a more direct and potentially more damaging approach to compromising industrial control systems.
Mitigation strategies for CVE-2012-4356 should prioritize immediate patching of affected systems to version 2.07.17 or later, which contains the necessary input validation fixes. Network segmentation should be implemented to isolate SCADA systems from general corporate networks, with strict firewall rules limiting access to TCP port 46824 to only authorized systems. Additional security measures include implementing network monitoring to detect suspicious traffic patterns on the affected port, conducting regular security audits of industrial control systems, and establishing proper access controls that limit who can interact with SCADA systems. Organizations should also consider implementing intrusion detection systems specifically configured to identify and alert on directory traversal attempts targeting industrial protocols, as these attacks often follow predictable patterns that can be detected through network traffic analysis. The vulnerability underscores the importance of securing industrial control systems against traditional cybersecurity threats that have long been recognized in general computing environments but remain under-addressed in critical infrastructure protection strategies.