CVE-2012-4708 in CODESYS Gateway-Server
Summary
by MITRE
Stack-based buffer overflow in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to execute arbitrary code via a crafted packet.
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Analysis
by VulDB Data Team • 04/25/2017
The CVE-2012-4708 vulnerability represents a critical stack-based buffer overflow flaw discovered in the 3S CODESYS Gateway-Server software version 2.3.9.27 and earlier. This vulnerability exists within the network protocol handling mechanisms of the industrial automation software, specifically when processing incoming network packets. The flaw stems from inadequate input validation and bounds checking in the server's packet processing routine, creating an exploitable condition that can be remotely triggered by malicious actors. The vulnerability affects industrial control systems and automation environments where 3S CODESYS Gateway-Server is deployed, potentially compromising critical infrastructure operations.
The technical implementation of this buffer overflow occurs when the Gateway-Server receives a specially crafted network packet that exceeds the allocated buffer size in memory. This condition allows attackers to overwrite adjacent memory locations on the stack, potentially corrupting program execution flow and enabling arbitrary code execution. The vulnerability is classified as a stack-based buffer overflow, which is a well-documented weakness categorized under CWE-121 in the Common Weakness Enumeration system. Attackers can leverage this flaw by constructing malicious packets that deliberately exceed buffer boundaries, causing the program to jump to attacker-controlled code locations within the memory space. The exploit requires network access to the affected server and can be executed without authentication, making it particularly dangerous in industrial environments where such systems may be exposed to external networks.
The operational impact of CVE-2012-4708 extends beyond simple code execution to potentially compromise entire industrial control systems and operational technology networks. Organizations utilizing 3S CODESYS Gateway-Server in manufacturing, process control, or other industrial applications face significant risk of unauthorized access, system compromise, and potential disruption of critical operations. The vulnerability can be exploited to gain persistent access to industrial networks, potentially enabling attackers to manipulate control systems, access sensitive operational data, or cause physical damage to equipment. This threat is particularly concerning in environments governed by industrial security standards such as IEC 62443 and NIST SP 800-82, where the integrity and availability of control systems are paramount. The vulnerability's remote exploitability means that attackers can target systems from outside the organization's network perimeter, increasing the attack surface and making traditional network segmentation less effective.
Mitigation strategies for CVE-2012-4708 primarily focus on immediate software updates and network security measures. Organizations should prioritize upgrading to 3S CODESYS Gateway-Server version 2.3.9.27 or later, which contains the necessary patches to address the buffer overflow vulnerability. Network segmentation and access controls should be implemented to limit exposure of the affected systems to untrusted networks. Security monitoring should be enhanced to detect unusual network traffic patterns that might indicate exploitation attempts, particularly focusing on malformed packets targeting the affected software. Additional protective measures include implementing network intrusion detection systems that can identify and block malicious packets, conducting regular vulnerability assessments of industrial control systems, and establishing incident response procedures specifically designed for industrial cybersecurity incidents. The vulnerability also highlights the importance of secure coding practices and input validation in industrial software development, aligning with ATT&CK techniques related to exploitation of software vulnerabilities and privilege escalation within industrial control environments.