CVE-2024-33698 in SIMATIC Information Server 2022
Summary
by MITRE • 09/10/2024
A vulnerability has been identified in SIMATIC Information Server 2022 (All versions), SIMATIC Information Server 2024 (All versions), SIMATIC PCS neo V4.0 (All versions), SIMATIC PCS neo V4.1 (All versions < V4.1 Update 2), SIMATIC PCS neo V5.0 (All versions), SINEC NMS (All versions), Totally Integrated Automation Portal (TIA Portal) V16 (All versions), Totally Integrated Automation Portal (TIA Portal) V17 (All versions < V17 Update 8), Totally Integrated Automation Portal (TIA Portal) V18 (All versions), Totally Integrated Automation Portal (TIA Portal) V19 (All versions). Affected products contain a heap-based buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to execute arbitrary code.
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Analysis
by VulDB Data Team • 10/05/2024
This vulnerability represents a critical heap-based buffer overflow within the Unified Management Console (UMC) component of multiple Siemens industrial automation software products. The flaw exists in the memory management handling of user input data, specifically within the processing of network requests that flow through the UMC interface. Attackers can exploit this weakness by sending specially crafted malicious data packets to the affected systems, which then causes the application to write beyond the allocated memory boundaries. The vulnerability affects a broad range of Siemens products including SIMATIC Information Server versions 2022 and 2024, SIMATIC PCS neo versions 4.0 through 5.0, SINEC NMS, and various versions of the Totally Integrated Automation Portal from V16 through V19. The heap-based nature of this vulnerability means that attackers can manipulate memory layout and potentially overwrite critical program data structures, leading to arbitrary code execution. This type of vulnerability falls under CWE-121 Heap-based Buffer Overflow, which is classified as a severe memory safety issue that can be exploited for privilege escalation and system compromise. The vulnerability is particularly concerning because it allows unauthenticated remote code execution, meaning attackers do not require valid credentials to exploit the flaw, significantly expanding the attack surface.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise and potential industrial control system disruption. When successfully exploited, attackers can gain full control over affected systems, potentially leading to unauthorized access to critical industrial processes, data manipulation, or system denial of service. The affected products are commonly deployed in industrial environments where operational technology (OT) systems control manufacturing processes, power generation, and other critical infrastructure. This makes the vulnerability particularly dangerous as it could enable attackers to disrupt production operations, compromise safety systems, or gain access to sensitive operational data. The attack vector through the UMC component suggests that even network segments with limited access could be compromised if attackers can reach the affected services, as the UMC interface typically handles various management functions including configuration updates, monitoring, and administrative tasks. The vulnerability's presence in multiple versions of the software indicates that this is likely a fundamental architectural issue rather than a simple patchable bug, requiring comprehensive remediation across affected systems.
Mitigation strategies for this vulnerability should focus on immediate network segmentation and access control measures to limit exposure to the affected UMC components. Organizations should implement network firewalls and access control lists to restrict access to the affected systems, particularly blocking unauthorized external access to the UMC ports and services. The most effective immediate solution is to apply the vendor-provided patches and updates, which should address the heap-based buffer overflow in the UMC component. System administrators should also consider disabling unnecessary UMC services and components when they are not actively required for operations. Security monitoring should be enhanced to detect unusual network traffic patterns that might indicate exploitation attempts, including monitoring for malformed packets or unusual data flows to the affected services. Additionally, organizations should conduct comprehensive vulnerability assessments to identify all instances of the affected software across their industrial control networks, as these systems often have complex network topologies that may contain multiple vulnerable endpoints. The vulnerability's classification under ATT&CK technique T1210 (Exploitation of Remote Services) highlights the need for robust service hardening and continuous monitoring of remote access points. Regular security audits and penetration testing should be conducted to verify that the mitigations are properly implemented and that no additional vulnerabilities exist within the industrial control system environment. Organizations should also consider implementing network intrusion detection systems specifically configured to identify and alert on exploitation attempts targeting this specific vulnerability.