CVE-2023-47279 is a high-severity vulnerability identified in Delta Electronics InfraSuite Device Master version 1.0.7. The vulnerability is classified as CWE-22, which corresponds to an improper limitation of a pathname to a restricted directory, commonly known as a path traversal flaw. This vulnerability allows an unauthenticated attacker to send a specially crafted single UDP packet to the affected device, which can lead to multiple security issues. Specifically, the attacker can disclose sensitive user information, including plaintext credentials, and potentially perform NTLM relay attacks. The vulnerability does not require any prior authentication or user interaction, making it highly accessible for exploitation over the network. The CVSS v3.1 base score of 7.5 reflects a high severity, with an attack vector that is network-based (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The impact is primarily on confidentiality (C:H), with no direct impact on integrity or availability. The path traversal aspect suggests that the attacker can access files or directories outside the intended scope, which may include configuration files or credential stores. The NTLM relay possibility indicates that attackers might leverage the disclosed credentials to impersonate legitimate users or escalate privileges within the network. Although no known exploits are currently reported in the wild, the vulnerability poses a significant risk due to its ease of exploitation and the sensitive nature of the information that can be disclosed. The lack of available patches at the time of publication increases the urgency for affected organizations to implement mitigations.

For European organizations using Delta Electronics InfraSuite Device Master, this vulnerability could lead to unauthorized disclosure of sensitive user credentials and information, potentially compromising internal network security. The ability to perform NTLM relay attacks could allow attackers to impersonate legitimate users, leading to lateral movement within corporate networks, unauthorized access to critical systems, and data breaches. Since the vulnerability can be exploited remotely without authentication, it increases the attack surface, especially for organizations with devices exposed to less secure network segments or the internet. This could affect industrial control systems, building management, or other infrastructure relying on InfraSuite Device Master, leading to operational disruptions or compliance violations under regulations such as GDPR due to the exposure of personal data. The confidentiality breach could undermine trust and cause financial and reputational damage. Additionally, the exploitation could serve as an entry point for more sophisticated attacks targeting European critical infrastructure or enterprises.

1. Network Segmentation: Isolate InfraSuite Device Master devices from public networks and restrict access to trusted management networks only. 2. Implement strict firewall rules to block unsolicited UDP traffic to the device, especially from untrusted sources. 3. Monitor network traffic for unusual UDP packets targeting the device to detect potential exploitation attempts. 4. Disable or restrict NTLM authentication where possible, or implement SMB signing and extended protection to mitigate NTLM relay attacks. 5. Regularly audit and review device configurations and access logs for signs of unauthorized access. 6. Engage with Delta Electronics for timely updates or patches addressing this vulnerability; if unavailable, consider compensating controls such as virtual patching via intrusion prevention systems. 7. Employ strong credential management policies, including the use of multi-factor authentication and frequent credential rotation, to limit the impact of credential disclosure. 8. Conduct security awareness training for staff managing these devices to recognize and respond to potential exploitation indicators.