CVE-2020-15744 in PC420 Smart Camera
Summary
by MITRE • 08/30/2021
Stack-based Buffer Overflow vulnerability in the ONVIF server component of Victure PC420 smart camera allows an attacker to execute remote code on the target device. This issue affects: Victure PC420 firmware version 1.2.2 and prior versions.
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Analysis
by VulDB Data Team • 09/01/2021
The vulnerability identified as CVE-2020-15744 represents a critical stack-based buffer overflow flaw within the ONVIF server component of Victure PC420 smart camera devices. This issue stems from insufficient input validation mechanisms that fail to properly constrain data lengths during processing of network requests. The vulnerability specifically impacts firmware versions 1.2.2 and earlier, indicating that subsequent releases may have incorporated necessary security patches to address this weakness. The ONVIF protocol implementation in the camera's server component creates an attack surface where malformed input data can overwrite adjacent memory locations on the stack, potentially leading to arbitrary code execution.
The technical exploitation of this vulnerability occurs through remote network-based attacks targeting the camera's ONVIF server functionality. Attackers can craft malicious packets containing oversized data payloads that exceed the allocated buffer space, causing the stack to overflow and overwrite critical memory segments including return addresses and function pointers. This memory corruption allows attackers to redirect execution flow and inject malicious code into the device's operational environment. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient boundary checking permits data to overwrite adjacent memory locations. The attack vector requires network connectivity to the camera's ONVIF service and does not necessitate physical access or authentication credentials, making it particularly dangerous in unsecured network environments.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete system compromise of affected Victure PC420 devices. Successful exploitation enables attackers to gain full administrative control over the camera, potentially allowing for persistent backdoor installation, data exfiltration, or use of the device as a pivot point for further network reconnaissance. The compromised camera could be utilized to capture and transmit sensitive video feeds, serve as a command and control node for other IoT devices, or be leveraged for distributed denial-of-service attacks. This vulnerability particularly affects surveillance deployments where these cameras are used in sensitive environments, as it undermines the fundamental security assumptions of networked video surveillance systems and creates persistent threats to privacy and operational integrity.
Organizations should immediately implement firmware updates to address this vulnerability, ensuring that all affected Victure PC420 devices are upgraded to versions containing the necessary security patches. Network segmentation strategies should be employed to isolate these devices from critical network segments, while firewall rules should restrict access to the ONVIF service ports to trusted IP addresses only. Monitoring network traffic for anomalous patterns related to ONVIF protocol usage can help detect potential exploitation attempts. Additionally, implementing intrusion detection systems with signature-based detection for known exploit patterns related to this vulnerability can provide early warning capabilities. The remediation approach should also include comprehensive network scanning to identify all affected devices, along with regular security assessments to verify that patches have been properly applied and that no other vulnerabilities exist within the same device firmware or networked ecosystem. This vulnerability demonstrates the critical importance of maintaining up-to-date firmware and implementing robust network security controls for IoT devices.