EUVD-2024-53494

Comprehensive Technical Analysis of EUVD-2024-53494

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-53494, also known as CVE-2024-57021, pertains to an OS command injection vulnerability in the TOTOLINK X5000R router, specifically in the "eHour" parameter of the setWiFiScheduleCfg function. The Base Score of 9.8, as per CVSS 3.1, indicates a critical severity level. The vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Privileges Required (PR): None (N) - No special privileges are needed to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Unchanged (U) - The vulnerability does not affect resources beyond the security scope managed by the security authority.
• Confidentiality (C): High (H) - Complete loss of confidentiality.
• Integrity (I): High (H) - Complete loss of integrity.
• Availability (A): High (H) - Complete loss of availability.

Given these metrics, the vulnerability is highly critical and poses a significant risk to affected systems.

2. Potential Attack Vectors and Exploitation Methods

The OS command injection vulnerability can be exploited by sending specially crafted requests to the setWiFiScheduleCfg function with malicious input in the "eHour" parameter. Potential attack vectors include:

• Remote Code Execution (RCE): An attacker can inject arbitrary OS commands, leading to remote code execution on the affected device.
• Data Exfiltration: Sensitive information can be exfiltrated by injecting commands that read and transmit data.
• Denial of Service (DoS): An attacker can inject commands that disrupt the normal operation of the device, leading to a denial of service.

Exploitation methods may involve:

• Network Scanning: Identifying vulnerable devices on the network.
• Crafted HTTP Requests: Sending HTTP requests with malicious payloads to the vulnerable endpoint.
• Automated Scripts: Using automated scripts to exploit the vulnerability at scale.

3. Affected Systems and Software Versions

The vulnerability affects TOTOLINK X5000R routers running firmware version V9.1.0cu.2350_B20230313. It is crucial to note that other versions of the firmware may also be affected if they share the same codebase or have not been patched for this specific issue.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Firmware Update: Immediately update the firmware to a patched version provided by TOTOLINK.
• Network Segmentation: Isolate vulnerable devices on a separate network segment to limit potential damage.
• Access Control: Implement strict access controls to limit who can access the device's management interface.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activity and potential exploitation attempts.
• Firewall Rules: Configure firewall rules to restrict access to the device's management interface.

5. Impact on European Cybersecurity Landscape

The presence of this vulnerability in a widely used router model poses a significant threat to the European cybersecurity landscape. Unpatched devices can be exploited to gain unauthorized access, exfiltrate data, or disrupt services, affecting both individual users and organizations. The critical nature of the vulnerability underscores the importance of timely patching and proactive security measures.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerable Endpoint: The setWiFiScheduleCfg function, specifically the "eHour" parameter.
• Exploitation Payload: Crafted HTTP requests with injected OS commands.
• Detection: Monitor network traffic for unusual patterns or requests targeting the vulnerable endpoint.
• Logging: Enable detailed logging on the device to capture any suspicious activity.
• Patch Verification: Verify the integrity and authenticity of firmware updates from TOTOLINK before applying them.

References:

• TOTOLINK Official Website
• GitHub Repository with Vulnerability Details

By addressing this vulnerability promptly and effectively, organizations can significantly reduce the risk of exploitation and maintain the integrity and security of their networks.