CVE-2023-3770 in INGEPAC DA3451
Summary
by MITRE • 10/25/2023
Incorrect validation vulnerability of the data entered, allowing an attacker with access to the network on which the affected device is located to use the discovery port protocol (1925/UDP) to obtain device-specific information without the need for authentication.
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Analysis
by VulDB Data Team • 10/25/2023
This vulnerability represents a critical information disclosure flaw affecting networked devices that implement the discovery port protocol on UDP port 1925. The issue stems from inadequate input validation mechanisms within the device's protocol implementation, allowing unauthorized network actors to exploit the service without requiring authentication credentials. The vulnerability specifically targets the device discovery functionality, which typically operates to facilitate network device identification and configuration processes. Attackers can leverage this weakness to gather sensitive device-specific information including device models, firmware versions, network configurations, and potentially other identifying characteristics that could aid in subsequent attack phases. The discovery port protocol operates at the network layer, making it accessible to any attacker within the same network segment who can intercept or manipulate UDP traffic on the designated port. This represents a fundamental failure in the principle of least privilege and authentication requirements, as the protocol should normally require proper authorization before exposing device information to external parties.
The technical implementation flaw manifests in the device's failure to properly validate incoming data packets sent to the discovery port. When legitimate discovery requests are received, the system should perform comprehensive input validation to ensure that the requests originate from authorized sources or meet specific criteria before responding with device information. However, the current implementation lacks robust validation checks, allowing malformed or unauthorized requests to trigger information disclosure responses. This vulnerability aligns with CWE-20, which addresses "Improper Input Validation" and represents a classic example of how insufficient data validation can lead to information exposure. The attack vector operates entirely within the network perimeter, requiring only local network access rather than remote exploitation, making it particularly concerning for environments where network segmentation is not properly implemented. The UDP protocol nature means that attackers can send spoofed packets or perform packet sniffing to observe responses without requiring a persistent connection, which simplifies the attack execution.
The operational impact of this vulnerability extends beyond simple information gathering, as the exposed device information can serve as a foundation for more sophisticated attacks. An attacker who successfully exploits this vulnerability can build detailed profiles of network devices, identify outdated firmware versions, discover network topology information, and potentially identify known vulnerabilities specific to particular device models or firmware versions. This intelligence gathering capability significantly reduces the attack surface for subsequent exploitation attempts, as attackers can tailor their approaches based on the discovered device characteristics. The vulnerability affects the confidentiality aspect of the CIA triad, as unauthorized disclosure of device information violates the principle that sensitive network information should remain protected from unauthorized access. Organizations may face compliance violations if device information is exposed, particularly in regulated environments where network device inventory and configuration details are considered sensitive information. The impact is particularly severe in enterprise networks where multiple devices may be running the vulnerable protocol, potentially exposing an entire network infrastructure to reconnaissance attacks.
Mitigation strategies should focus on implementing proper input validation and access controls for the discovery port protocol. Network administrators should ensure that UDP port 1925 is properly firewalled and restricted to authorized network segments only, preventing unauthorized access from external networks or untrusted zones. The implementation should enforce strict authentication mechanisms before responding to discovery requests, ensuring that only legitimate network management systems or authorized devices can query device information. Organizations should consider implementing network segmentation controls to isolate network discovery services from general network traffic, following the principle of least privilege. Regular network monitoring should be implemented to detect unusual discovery protocol activity that may indicate exploitation attempts. Device firmware updates should be applied promptly to address the vulnerability, while network administrators should conduct thorough vulnerability assessments to identify other potentially exposed services or protocols. The solution approach aligns with ATT&CK technique T1046 which covers "Network Service Scanning' and T1082 which addresses 'Software Discovery', demonstrating how this vulnerability enables reconnaissance activities that support broader attack campaigns. Additionally, implementing proper network access controls and monitoring solutions helps defend against this type of information disclosure threat while maintaining the legitimate functionality of network discovery protocols.