Overview
The Common Vulnerabilities and Exposures (CVE) system has identified a significant vulnerability in the Blackmagic Web Presenter HD firmware version 3.3, designated as CVE-2025-57437. This vulnerability exposes sensitive device configuration data through an unauthenticated Telnet service on port 9977. This vulnerability affects IT professionals, network administrators, and anyone using the Blackmagic Web Presenter HD for live streaming, and it’s particularly concerning due to the potential for data leakage and system compromise.
Vulnerability Summary
CVE ID: CVE-2025-57437
Severity: Critical (9.8 CVSS Severity Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise, data leakage, and unauthorized access to live streams
Affected Products
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Product | Affected Versions
Blackmagic Web Presenter HD | Firmware version 3.3
How the Exploit Works
The vulnerability stems from the unauthenticated Telnet service on port 9977. An attacker can connect to this service and access extensive device configuration data, including model, version, and unique identifiers, network settings (IP, MAC, DNS), and current stream platform, stream key, and streaming URL. This information, in the wrong hands, can provide an attacker with the necessary data to hijack live streams or perform network reconnaissance, potentially compromising the entire system.
Conceptual Example Code
The following is a conceptual example of how an attacker might exploit the vulnerability. It’s a simple Telnet command that would connect the attacker to the targeted device:
telnet target.example.com 9977This command initiates a Telnet session with the targeted device. Once connected, the attacker can issue commands to reveal the device’s sensitive configuration data, providing them with the information needed to hijack live streams or perform further malicious activities.
Mitigation and Prevention
To protect your systems from this vulnerability, apply the vendor patch as soon as it becomes available. In the meantime, you should use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation. Regularly updating your systems and maintaining robust security protocols can also significantly reduce the risk of such vulnerabilities being exploited.
Remember, cybersecurity is not a one-time task but a continuous process of vigilance and adaptation to the ever-evolving threat landscape. Stay safe, stay updated.
