CVE-2024-41882 is a stack-based buffer overflow vulnerability identified in the Hanwha Vision Co., Ltd. XRN-420S Network Video Recorder (NVR) devices, specifically affecting firmware versions 5.01.62 and prior. The vulnerability arises when an attacker sends excessively large data within URL parameters to the device, causing a stack overflow condition. This overflow can lead to a system reboot and potentially enable remote code execution (RCE). The flaw is classified under CWE-121, which pertains to improper handling of buffer boundaries on the stack, a common source of memory corruption vulnerabilities. The vulnerability can be exploited remotely over the network without requiring user interaction or authentication, as indicated by the CVSS vector (AV:N/AC:L/AT:N/UI:N/PR:H). However, the vector also notes that privileges are required (PR:H), meaning the attacker must have high-level privileges on the device to exploit this vulnerability. The CVSS 4.0 base score is 6.9, categorizing it as a medium severity issue. The manufacturer has acknowledged the vulnerability and released patched firmware to address the flaw, though no direct patch links are provided in the data. No known exploits are currently reported in the wild. The vulnerability's impact primarily affects the availability of the device due to forced reboots and could escalate to full system compromise if remote code execution is achieved. Given the critical role of NVRs in video surveillance infrastructure, exploitation could disrupt security monitoring and incident response capabilities.

For European organizations, especially those relying on Hanwha Vision XRN-420S NVRs for physical security and surveillance, this vulnerability poses a significant risk. Successful exploitation could lead to denial of service through repeated device reboots, impairing video recording and live monitoring functions. In environments such as critical infrastructure, transportation hubs, government facilities, and large enterprises, such disruptions could degrade situational awareness and delay incident detection or response. If remote code execution is achieved, attackers could potentially manipulate recorded footage, disable security alerts, or use the compromised NVR as a foothold for lateral movement within the network. This risk is heightened in sectors with stringent security requirements and regulatory compliance obligations under GDPR and other frameworks. The medium severity rating suggests a moderate but non-negligible threat, particularly if attackers gain privileged access. The absence of known exploits in the wild currently limits immediate risk, but the availability of a public CVE and patch underscores the need for prompt remediation to prevent future exploitation.

European organizations should prioritize the following specific mitigation steps: 1) Immediately verify the firmware version of all Hanwha Vision XRN-420S devices and upgrade to the latest patched firmware released by the vendor to eliminate the vulnerability. 2) Restrict network access to NVR management interfaces by implementing network segmentation and firewall rules that limit access to trusted administrative hosts only. 3) Enforce strong authentication and access controls to prevent unauthorized users from obtaining the high privileges required to exploit the vulnerability. 4) Monitor network traffic and device logs for unusual or malformed URL requests that could indicate attempted exploitation. 5) Implement intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics targeting buffer overflow attempts on NVR devices. 6) Conduct regular security audits and vulnerability assessments of physical security infrastructure to identify and remediate similar risks proactively. 7) Establish incident response procedures specific to physical security device compromise to minimize operational impact. These measures go beyond generic advice by focusing on access control hardening, network isolation, and active monitoring tailored to the NVR environment.