CVE-2024-54847 is a vulnerability identified in the CP Plus CP-VNR-3104 B3223P22C02424 network video recorder (NVR) device. The vulnerability stems from improper handling or exposure of Diffie-Hellman (DH) parameters during cryptographic operations, which are intended to secure communications via key exchange. Attackers who can access these DH parameters may be able to decrypt sensitive data or conduct man-in-the-middle (MitM) attacks by intercepting and manipulating network traffic between the device and legitimate clients or servers. The CVSS v3.1 base score is 5.9, indicating a medium severity level. The attack vector is network-based (AV:N), but the attack complexity is high (AC:H), meaning exploitation requires specific conditions or advanced skills. No privileges or user interaction are required (PR:N/UI:N), and the scope is unchanged (S:U). The vulnerability primarily impacts confidentiality (C:H) without affecting integrity or availability. The underlying weakness is categorized under CWE-295, which involves improper certificate validation or cryptographic protocol implementation flaws. No patches or fixes have been released yet, and no known exploits have been observed in the wild. This vulnerability could be leveraged by attackers to compromise the confidentiality of communications involving the affected device, potentially exposing video feeds or control data. Given the device's role in surveillance and security, this could have serious implications for privacy and security monitoring.

The primary impact of CVE-2024-54847 is the compromise of confidentiality for communications involving the affected CP Plus NVR device. Attackers able to exploit this vulnerability could intercept sensitive video streams or control commands, undermining the security and privacy of surveillance systems. This could facilitate espionage, unauthorized surveillance, or data leakage. Although the vulnerability does not affect integrity or availability, the ability to perform man-in-the-middle attacks could allow attackers to manipulate or replay intercepted data in some scenarios, depending on additional system weaknesses. Organizations relying on these devices for physical security or monitoring critical infrastructure may face increased risk of undetected breaches or surveillance circumvention. The medium severity rating reflects the high attack complexity and lack of known exploits, but the potential impact on sensitive data confidentiality is significant. The absence of patches increases exposure duration, emphasizing the need for proactive mitigation. The threat is particularly relevant for sectors such as government, critical infrastructure, transportation, and large enterprises using CP Plus devices extensively.

Since no official patches are currently available, organizations should implement compensating controls to reduce risk. These include isolating the affected CP Plus NVR devices on segmented, trusted networks with strict access controls to limit exposure to untrusted networks or users. Employ network monitoring and intrusion detection systems to identify suspicious traffic patterns indicative of MitM attempts. Use VPNs or encrypted tunnels to secure communications to and from the devices, adding an additional encryption layer beyond the vulnerable DH parameters. Regularly audit device configurations and firmware versions to detect unauthorized changes or updates. Engage with CP Plus support channels to obtain updates on patch availability and apply them promptly once released. Additionally, consider deploying network-level protections such as TLS inspection gateways that enforce strong certificate validation policies. For critical environments, evaluate alternative devices or vendors with stronger cryptographic implementations. Finally, maintain incident response readiness to quickly address any detected exploitation attempts.