EUVD-2023-41453

Comprehensive Technical Analysis of EUVD-2023-41453

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2023-41453 is a command injection flaw affecting several models of ELECOM and LOGITEC wireless LAN routers. This vulnerability allows a remote, unauthenticated attacker to execute arbitrary commands by sending a specially crafted request to a specific port on the web management page. The severity of this vulnerability is rated with a CVSS Base Score of 9.8, which is considered critical. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates the following:

• 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 authentication is required to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability allows for unauthorized access to sensitive data.
• Integrity (I): High (H) - The vulnerability allows for unauthorized modification of data.
• Availability (A): High (H) - The vulnerability allows for disruption of service.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector for this vulnerability is through the web management interface of the affected routers. An attacker can exploit this vulnerability by:

• Sending Crafted Requests: An attacker can send specially crafted HTTP requests to the web management interface, which includes malicious commands.
• Remote Command Execution: The crafted requests can execute arbitrary commands on the router, leading to full control over the device.
• Network Scanning: Attackers can scan networks for vulnerable routers and exploit them en masse.

3. Affected Systems and Software Versions

The affected products and versions are:

• ELECOM:

  • WRC-1167GHBK3-A v1.24 and earlier
  • WRC-F1167ACF2 all versions
  • WRC-600GHBK-A all versions
  • WRC-733FEBK2-A all versions
  • WRC-1467GHBK-A all versions
  • WRC-1900GHBK-A all versions

• LOGITEC:

  • LAN-W301NR all versions

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following strategies are recommended:

• Firmware Updates: Immediately apply firmware updates provided by the vendors. Ensure that all affected devices are updated to the latest version.
• Network Segmentation: Segment the network to isolate vulnerable devices from critical systems.
• Access Control: Implement strict access controls to limit who can access the web management interface.
• Firewall Rules: Configure firewalls to block unauthorized access to the web management interface.
• Monitoring and Logging: Enable logging and monitoring to detect any suspicious activity on the network.

5. Impact on European Cybersecurity Landscape

The impact of this vulnerability on the European cybersecurity landscape is significant due to the widespread use of wireless LAN routers in both residential and commercial settings. The potential for remote, unauthenticated command execution poses a serious risk to network security, data integrity, and availability. Organizations and individuals must take immediate action to mitigate this risk to prevent potential data breaches, unauthorized access, and service disruptions.

6. Technical Details for Security Professionals

For security professionals, the following technical details are crucial:

• Detection: Implement intrusion detection systems (IDS) and intrusion prevention systems (IPS) to detect and block malicious traffic targeting the web management interface.
• Incident Response: Develop an incident response plan that includes steps for identifying, containing, and remediating compromised devices.
• Patch Management: Ensure that a robust patch management process is in place to apply updates promptly.
• Security Audits: Conduct regular security audits to identify and address vulnerabilities in network devices.
• User Education: Educate users on the importance of updating firmware and the risks associated with unpatched devices.

Conclusion

The command injection vulnerability in ELECOM and LOGITEC wireless LAN routers poses a critical risk to network security. Immediate action is required to update affected devices and implement robust security measures to mitigate the risk. Organizations and individuals must remain vigilant and proactive in their cybersecurity practices to protect against such vulnerabilities.

References

• ELECOM Security Advisory
• ELECOM Security Advisory
• JVN Vulnerability Note