EUVD-2023-37649

Comprehensive Technical Analysis of EUVD-2023-37649

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in EUVD-2023-37649 affects the TOTOLINK X5000R router, specifically in versions V9.1.0u.6118_B20201102 and V9.1.0u.6369_B20230113. The issue is a command insertion vulnerability in the setOpModeCfg function, which allows an attacker to execute arbitrary commands through the hostName parameter.

Severity Evaluation:

• Base Score: 9.8 (Critical)
• Base Score Version: CVSS 3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The CVSS score of 9.8 indicates a critical vulnerability due to the following factors:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): None (N)
• User Interaction (UI): None (N)
• Scope (S): Unchanged (U)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

This high score reflects the potential for severe impact on confidentiality, integrity, and availability of the affected systems.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: Given the network attack vector, an attacker can exploit this vulnerability remotely without needing physical access to the device.
• Command Injection: The attacker can inject malicious commands through the hostName parameter, leading to arbitrary command execution.

Exploitation Methods:

• Unauthenticated Access: The attacker does not need any special privileges or user interaction to exploit this vulnerability.
• Command Execution: By crafting a specially designed request, the attacker can execute commands on the router, potentially leading to full system compromise.

3. Affected Systems and Software Versions

Affected Systems:

• TOTOLINK X5000R routers

Affected Software Versions:

• V9.1.0u.6118_B20201102
• V9.1.0u.6369_B20230113

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Patching: Apply the latest firmware updates provided by TOTOLINK to mitigate the vulnerability.
• Network Segmentation: Isolate the affected routers from critical networks to limit the potential impact of an attack.
• Firewall Rules: Implement strict firewall rules to restrict access to the router's management interface.

Long-Term Mitigation:

• Regular Updates: Ensure that all network devices are regularly updated with the latest security patches.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activities and potential exploitation attempts.
• Security Audits: Conduct regular security audits to identify and address vulnerabilities in network devices.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using TOTOLINK X5000R routers. The potential for remote command execution can lead to:

• Data Breaches: Unauthorized access to sensitive information.
• Network Compromise: Attackers gaining control over network infrastructure.
• Service Disruption: Denial of service attacks leading to network downtime.

Given the critical nature of the vulnerability, it is essential for European organizations to prioritize patching and implementing robust security measures to protect against potential exploitation.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: setOpModeCfg
• Parameter: hostName
• Vulnerability Type: Command Injection

Exploitation Steps:

1. Identify Target: Locate the TOTOLINK X5000R router on the network.
2. Craft Malicious Request: Create a request that includes malicious commands in the hostName parameter.
3. Execute Command: Send the crafted request to the router, leading to arbitrary command execution.

Detection and Monitoring:

• Log Analysis: Monitor router logs for unusual command execution or unauthorized access attempts.
• Network Traffic Analysis: Use network monitoring tools to detect suspicious traffic patterns indicative of exploitation attempts.

References:

• GitHub Repository

Aliases:

• CVE-2023-33486
• GSD-2023-33486

Assigner:

• Mitre

EPSS Score:

• 2 (Indicating a low likelihood of exploitation in the wild, but still a significant risk due to the critical nature of the vulnerability)

ENISA ID Product and Vendor:

• Product ID: de45490e-14d3-384a-ac85-de6da711db6e
• Vendor ID: e8539508-9312-3984-9e8c-024c105fd526

By addressing this vulnerability promptly and effectively, organizations can significantly reduce the risk of cyber attacks and ensure the security of their network infrastructure.