CVE-2020-10037 in SICAM MMU
Summary
by MITRE
A vulnerability has been identified in SICAM MMU (All versions < V2.05), SICAM SGU (All versions), SICAM T (All versions < V2.18). By performing a flooding attack against the web server, an attacker might be able to gain read access to the device's memory, possibly revealing confidential information.
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Analysis
by VulDB Data Team • 07/15/2020
This vulnerability affects Siemens industrial security devices including SICAM MMU, SICAM SGU, and SICAM T products across multiple firmware versions. The flaw represents a significant security weakness that stems from inadequate protection mechanisms against network-based flooding attacks targeting the web server component. The vulnerability enables attackers to exploit memory access controls through deliberate resource exhaustion techniques that overwhelm the device's web server functionality.
The technical implementation of this vulnerability involves a denial-of-service condition that can be leveraged to achieve unauthorized memory read access. When an attacker floods the web server with excessive requests or malformed data, the device's memory management system becomes compromised, creating opportunities for information disclosure. This type of attack aligns with common web application vulnerabilities where insufficient input validation and resource handling leads to memory exposure. The flaw essentially creates a pathway for attackers to bypass normal access controls and potentially extract sensitive data stored in the device's memory.
The operational impact of this vulnerability extends beyond simple denial-of-service conditions to include potential data breaches and information disclosure. Attackers who successfully exploit this weakness could gain access to confidential information stored within the device memory, including configuration data, authentication credentials, or proprietary system information. This represents a serious concern for industrial control systems where device security is paramount to overall operational integrity. The vulnerability particularly affects environments where these devices operate as part of critical infrastructure, potentially exposing operational technology networks to further compromise.
From a cybersecurity perspective, this vulnerability maps to CWE-400, which addresses unchecked resource consumption, and relates to ATT&CK technique T1499.004 for network denial of service attacks. The exploitation pattern follows typical attack vectors used in industrial control system compromises where network-based flooding attacks are employed to create memory access opportunities. Organizations should implement immediate network segmentation to isolate affected devices from critical network segments, deploy intrusion detection systems to monitor for flooding patterns, and apply firmware updates to patched versions. Additionally, network access controls should be configured to limit web server access to authorized personnel only, while regular security assessments should verify device configurations and monitor for unusual traffic patterns that might indicate exploitation attempts.