CVE-2024-54848: CP Plus CP-VNR-3104 Info Disclosure Flaw

CVE-2024-54848 Overview

CVE-2024-54848 affects the CP Plus CP-VNR-3104 network video recorder (NVR) running firmware version B3223P22C02424. The device improperly handles and stores TLS certificates, weakening the cryptographic protection of its communications. Attackers positioned on the network can exploit this weakness to decrypt traffic or perform man-in-the-middle (MITM) attacks against the NVR and its clients. The flaw is tracked under CWE-295: Improper Certificate Validation and impacts the confidentiality and integrity of video surveillance streams, configuration data, and administrative sessions exchanged with the appliance.

Critical Impact

Network-adjacent attackers can intercept, decrypt, or tamper with surveillance traffic and administrative sessions to the CP-VNR-3104, exposing video feeds and credentials.

Affected Products

• CP Plus CP-VNR-3104 (hardware)
• CP Plus CP-VNR-3104 firmware version B3223P22C02424
• Deployments relying on the device's default TLS configuration for remote management or streaming

Discovery Timeline

• 2025-01-10 - CVE-2024-54848 published to the National Vulnerability Database (NVD)
• 2025-10-02 - Last updated in NVD

Technical Details for CVE-2024-54848

Vulnerability Analysis

The CP-VNR-3104 ships with TLS certificates that are not validated or stored using accepted cryptographic practices. According to the public security assessment of the device, the NVR exposes web and streaming services over HTTPS but does not enforce proper certificate validation on either end of the session. Because the trust anchors and private keys are mishandled, an attacker who can observe or redirect traffic between an operator and the NVR can present a forged certificate that the client accepts. This allows the adversary to terminate the TLS session, read plaintext credentials, configuration, and video data, and forward modified traffic onward. The exploitation pattern aligns with MITRE CAPEC-233: Privilege Escalation and standard active interception techniques against weakly authenticated TLS endpoints.

Root Cause

The root cause is improper certificate validation [CWE-295] combined with insecure storage of certificate material on the device. The firmware accepts certificate chains without verifying issuer authenticity, hostname binding, or revocation status. Stored certificates and associated private keys are accessible in ways that undermine their function as long-term secrets.

Attack Vector

Exploitation requires network access between the victim client and the NVR, or a position on the same network segment as the device. The attacker intercepts the TLS handshake, substitutes a controlled certificate, and proxies the session. No authentication is required to attempt the attack, although the conditions for reliable interception keep complexity high. Successful interception yields cleartext credentials, live video, and the ability to inject commands into administrative sessions.

No verified public proof-of-concept code is available for this issue. The referenced security assessment describes the weakness in prose and demonstrates impact through traffic analysis rather than a packaged exploit.

Detection Methods for CVE-2024-54848

Indicators of Compromise

• Unexpected TLS certificates presented by the CP-VNR-3104 management interface that do not match the certificate fingerprint recorded during initial provisioning.
• ARP table anomalies or duplicate MAC addresses on the VLAN hosting the NVR, indicating possible ARP spoofing used to enable interception.
• Repeated TLS handshake renegotiations or downgraded cipher suites observed in traffic to and from the NVR.
• Administrative logins to the NVR from IP addresses or times that deviate from normal operator behavior.

Detection Strategies

• Pin and continuously verify the NVR's TLS certificate fingerprint from monitoring hosts and alert on any change.
• Inspect network metadata for the surveillance VLAN to identify rogue gateways, unexpected proxies, or new devices terminating TLS on behalf of the NVR.
• Correlate authentication events on the NVR with endpoint telemetry from operator workstations to identify credential reuse following suspected interception.

Monitoring Recommendations

• Forward NVR access logs and network flow data to a centralized analytics platform for long-term retention and anomaly detection.
• Monitor for plaintext credentials or RTSP streams traversing segments where only TLS is expected.
• Track firmware version reporting across the CP Plus fleet to identify devices still running B3223P22C02424.

How to Mitigate CVE-2024-54848

Immediate Actions Required

• Restrict management of the CP-VNR-3104 to a dedicated, isolated VLAN reachable only through hardened jump hosts.
• Disable remote administrative access from untrusted networks and require VPN for any off-LAN management.
• Rotate all credentials used with the NVR, assuming prior sessions may have been intercepted.
• Contact CP Plus support to confirm whether a firmware build later than B3223P22C02424 addresses the certificate handling defect.

Patch Information

No vendor advisory or patched firmware version is listed in the NVD record for CVE-2024-54848 at the time of publication. Operators should consult CP Plus directly for remediation guidance and track the NVD entry for updates. Until a fix is available, compensating network controls are the primary mitigation.

Workarounds

• Place the NVR behind a reverse proxy or TLS-terminating appliance that enforces strong certificate validation for clients.
• Apply strict Layer 2 controls such as DHCP snooping, dynamic ARP inspection, and port security to limit MITM positioning.
• Use out-of-band management networks and disable any unused services, including HTTP, RTSP, and SNMP, on the NVR.
• Replace default certificates with organization-issued certificates where the device permits, and record fingerprints for ongoing verification.