CVE-2017-12128 in EDR-810
Summary
by MITRE
An exploitable information disclosure vulnerability exists in the Server Agent functionality of Moxa EDR-810 V4.1 build 17030317. A specially crafted TCP packet can cause information disclosure. An attacker can send a crafted TCP packet to trigger this vulnerability.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 03/13/2023
The CVE-2017-12128 vulnerability represents a critical information disclosure flaw within the Moxa EDR-810 industrial network device, specifically affecting the Server Agent component in version V4.1 build 17030317. This vulnerability exposes the device to potential exploitation through network-based attacks targeting the TCP packet handling mechanism. The affected device operates within industrial control systems and network infrastructure environments where security is paramount, making this disclosure particularly concerning for operational technology environments. The vulnerability resides in how the Server Agent processes incoming TCP packets, creating a pathway for unauthorized information retrieval that could compromise system integrity and operational security.
This information disclosure vulnerability stems from inadequate input validation and buffer handling within the TCP packet processing pipeline of the Moxa EDR-810 device. The flaw allows attackers to craft specially designed TCP packets that, when transmitted to the affected system, trigger unintended data exposure. The vulnerability classification aligns with CWE-200, which addresses improper information disclosure, and represents a direct violation of data confidentiality principles. The attack vector requires only network access to the device, making it particularly dangerous in environments where physical security measures may be insufficient. The technical implementation likely involves memory corruption or improper state management that occurs during TCP packet parsing, leading to sensitive data leakage through the network interface.
The operational impact of this vulnerability extends beyond simple data exposure, as it could enable attackers to gather sensitive information about the device configuration, system state, or network topology. In industrial environments, this information disclosure could facilitate more sophisticated attacks such as privilege escalation, lateral movement, or system compromise. The vulnerability affects the device's ability to maintain secure communication channels and could potentially expose operational data that should remain confidential. Organizations relying on Moxa EDR-810 devices for industrial network management face significant risk, as the disclosure could reveal system internals that aid in planning further attacks. The vulnerability's exploitation does not require authentication, making it particularly dangerous for devices accessible over untrusted networks.
Mitigation strategies for CVE-2017-12128 should prioritize immediate firmware updates from Moxa to address the underlying Server Agent implementation flaw. Network segmentation and access control measures should be implemented to limit exposure of affected devices to untrusted networks. The implementation of intrusion detection systems and network monitoring can help detect suspicious TCP packet patterns that may indicate exploitation attempts. Organizations should also conduct comprehensive vulnerability assessments to identify other potentially affected devices within their industrial control system environments. The vulnerability demonstrates the importance of secure coding practices and proper input validation in embedded systems, aligning with ATT&CK technique T1071.004 for application layer protocol tunneling and information gathering activities. Regular security audits and firmware update schedules should be implemented to prevent similar vulnerabilities from remaining unpatched in operational technology environments.