The Four-Faith router models F3x24 and F3x36 are affected by an operating system (OS) command injection vulnerability. This vulnerability allows authenticated and remote attackers to execute arbitrary OS commands over HTTP when modifying the system time via apply.cgi. Additionally, this firmware version has default credentials which, if not changed, would effectively change this vulnerability into an unauthenticated and remote OS command execution issue. With a CVSS score of 7.2, this vulnerability is classified as high severity, highlighting its potential impact on organizations.
Risk to organizations includes unauthorized access and control over critical networking equipment, which can lead to further exploitation of internal systems. Attackers may leverage this vulnerability to execute commands that could compromise network integrity and availability. Organizations should prioritize patching immediately to mitigate risks associated with this vulnerability.
The vulnerability was published on December 27, 2024, and it is crucial for organizations using affected models to address this issue promptly. The existence of an exploit and the availability of public proof-of-concept (PoC) code increase the urgency for defenders to implement appropriate mitigations and controls.
In response to this vulnerability, organizations should assess their exposure and apply necessary updates or mitigations. Regular security assessments can help identify and remediate such vulnerabilities before they can be exploited.
Vulnerability Details
The vulnerability allows for OS command injection, specifically through the application of system time modifications. The affected components are the F3x24 and F3x36 firmware versions 2.0. It is classified under CWE-78 (OS Command Injection) and CWE-1392 (Default Credentials).
It is crucial to note that the default credentials associated with these firmware versions mean that any device with unmodified settings is at significantly higher risk. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, indicating a network attack vector with low complexity and requiring high privileges.
Technical Analysis
The root cause of this vulnerability lies in the insufficient validation of user inputs when the system time is modified. This creates a pathway for attackers to inject arbitrary commands into the OS. The attack vector is network-based, necessitating that the attacker have authenticated access, albeit with the potential for unauthenticated exploitation if default credentials are not changed.
The attack complexity is classified as low, meaning that an attacker with the necessary privileges can easily exploit this vulnerability without extensive effort. No user interaction is required, making it even easier for attackers to execute their commands. The vulnerability impacts confidentiality, integrity, and availability, all rated as high.
Risk & Impact Analysis
This vulnerability poses significant risks to organizations that deploy the affected Four-Faith router models. The potential for unauthorized access and command execution can lead to critical network disruptions. The failure to address this vulnerability may result in data loss, unauthorized data manipulation, and disruption of services, particularly for organizations reliant on these devices for operational integrity.
Given the high exploitation potential, organizations should schedule remediation as a priority within their patch management cycles. The presence of public exploit details and proof-of-concept code reinforces the need for immediate action to protect against potential exploitation.
Monitoring and detection mechanisms should be enhanced to identify any unauthorized command execution attempts or anomalies in network traffic that may indicate exploitation attempts.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Affected products include F3x24 and F3x36 firmware versions 2.0. Organizations using these versions should ensure they are updated to the latest firmware to mitigate this vulnerability.
Mitigation & Remediation
Organizations must prioritize updating to the latest firmware version provided by Four-Faith. Additionally, changing default credentials is critical to preventing unauthorized access. Regular audits of device configurations and implementing network controls can help mitigate risks. For further guidance, organizations can refer to the penetration testing methodology to ensure compliance with security best practices.
Detection Guidance
Organizations should monitor logs for unusual patterns of command execution and any unauthorized access attempts. Behavioral anomalies in network traffic may indicate exploitation attempts. Implementing intrusion detection systems can enhance monitoring capabilities.
AppSecure Threat Intelligence Insight
This vulnerability represents a critical issue for devices that remain unpatched. The trend of command injection vulnerabilities indicates a pattern that security teams must prioritize. Lessons learned from this incident highlight the importance of regular updates and security assessments. To enhance security posture, organizations should conduct thorough vulnerability management programs as well as regular continuous penetration testing to identify potential weaknesses before they can be exploited.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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