CVE-2025-34065 is an authentication bypass vulnerability identified in AVTECH IP camera, DVR, and NVR devices. The root cause lies in the streamd web server component of these devices, where the strstr() function is improperly used to parse URLs. Specifically, any HTTP request containing the substring "/nobody" in the URL bypasses the authentication mechanism entirely, allowing unauthenticated users to access device functions that should be protected. This vulnerability affects a broad range of AVTECH device firmware versions, as listed, indicating a systemic flaw in the authentication logic across multiple product lines. The vulnerability is classified under CWE-290 (Authentication Bypass by Spoofing), which means attackers can spoof or manipulate requests to circumvent login controls. The CVSS v4.0 base score is 6.9 (medium severity), reflecting that the attack vector is network-based with low attack complexity and no privileges or user interaction required. The impact on confidentiality, integrity, and availability is limited but present, as unauthorized access could allow attackers to view video streams, manipulate device settings, or disrupt surveillance operations. No known exploits are currently reported in the wild, and no patches have been linked yet, indicating that vendors or users may need to monitor for updates or apply workarounds. The vulnerability is critical to address due to the sensitive nature of surveillance devices, which often protect physical security perimeters and privacy-sensitive environments.

For European organizations, this vulnerability poses significant risks, especially for sectors relying heavily on AVTECH surveillance equipment such as government facilities, critical infrastructure, transportation hubs, and corporate campuses. Unauthorized access to video streams can lead to privacy violations, espionage, or reconnaissance for further attacks. Manipulation of device settings or disabling cameras could degrade physical security, increasing the risk of theft, sabotage, or unauthorized entry. Given the widespread deployment of AVTECH devices in Europe, especially in small to medium enterprises and public institutions, the impact could be substantial if exploited. The lack of authentication requirements and ease of exploitation mean attackers can remotely compromise devices without user interaction, increasing the threat surface. Additionally, compromised devices could be leveraged as entry points into internal networks or as part of botnets for distributed denial-of-service (DDoS) attacks, further amplifying the impact on availability and network integrity.

1. Immediate network segmentation: Isolate AVTECH devices on dedicated VLANs or subnets with strict firewall rules limiting inbound and outbound traffic to trusted management stations only. 2. Access control: Restrict remote access to these devices via VPN or secure tunnels, avoiding direct exposure to the internet. 3. URL filtering and monitoring: Implement intrusion detection/prevention systems (IDS/IPS) to detect and block HTTP requests containing the "/nobody" substring or anomalous URL patterns targeting these devices. 4. Firmware updates: Continuously monitor AVTECH vendor announcements for patches addressing this vulnerability and apply them promptly once available. 5. Device replacement or upgrade: For devices no longer supported or without patches, consider replacing them with more secure alternatives. 6. Logging and alerting: Enable detailed logging on devices and network gateways to detect unauthorized access attempts and respond rapidly. 7. Incident response planning: Prepare playbooks specific to surveillance device compromise scenarios to minimize operational disruption. 8. Vendor engagement: Engage with AVTECH for timelines on patch releases and request security advisories to stay informed.