CVE-2019-10969 in EDR 810
Summary
by MITRE
Moxa EDR 810, all versions 5.1 and prior, allows an authenticated attacker to abuse the ping feature to execute unauthorized commands on the router, which may allow an attacker to perform remote code execution.
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Analysis
by VulDB Data Team • 08/07/2024
The vulnerability identified as CVE-2019-10969 affects Moxa EDR 810 industrial network devices running firmware versions 5.1 and earlier. This represents a critical security flaw that transforms a legitimate network diagnostic function into a vector for arbitrary code execution. The device operates within industrial environments where network reliability and security are paramount, making this vulnerability particularly concerning for operational technology infrastructure.
The technical implementation of this vulnerability stems from insufficient input validation within the device's ping functionality. When an authenticated user submits a ping command with specially crafted parameters, the system fails to properly sanitize the input before processing. This input sanitization failure creates a command injection vulnerability that allows attackers to append malicious commands to the ping execution chain. The flaw exists at the application layer where user-supplied data is directly incorporated into system commands without adequate filtering or escaping mechanisms. According to CWE-77 and CWE-94 classifications, this manifests as a command injection vulnerability that enables arbitrary code execution.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with full remote code execution capabilities on the affected device. An authenticated attacker could leverage this vulnerability to gain complete control over the network gateway, potentially disrupting industrial operations, accessing sensitive network data, or establishing persistent access points within the industrial control network. The attack surface becomes significantly broader when considering that the device serves as a critical network boundary device, potentially allowing lateral movement attacks against other systems within the operational technology environment. This vulnerability aligns with ATT&CK technique T1203 for legitimate credential use and T1059 for command and scripting interpreter execution.
Mitigation strategies for this vulnerability should prioritize immediate firmware updates from Moxa to address the input validation flaws. Organizations should implement network segmentation to limit access to these devices to authorized personnel only, utilizing role-based access controls and multi-factor authentication where possible. Network monitoring should be enhanced to detect anomalous ping traffic patterns that might indicate exploitation attempts. Additionally, regular security assessments of industrial network devices should be conducted to identify similar input validation vulnerabilities that could enable similar command injection attacks. The vulnerability demonstrates the importance of validating all user inputs at multiple layers of the application stack and implementing proper input sanitization techniques to prevent such critical security flaws from compromising industrial network infrastructure.