EUVD-2024-53547

Comprehensive Technical Analysis of EUVD-2024-53547

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in EUVD-2024-53547 pertains to a command injection flaw in the Linksys E7350 router, specifically in the apcli_do_enr_pin_wps function via the ifname parameter. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The scoring vector 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 can be exploited remotely 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 for the attack to succeed.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability allows for unauthorized access to sensitive information.
• Integrity (I): High (H) - The vulnerability allows for unauthorized modification of data.
• Availability (A): High (H) - The vulnerability allows for disruption of service.

Given the high scores in confidentiality, integrity, and availability, this vulnerability poses a significant risk to affected systems.

2. Potential Attack Vectors and Exploitation Methods

The command injection vulnerability can be exploited by sending specially crafted network packets to the router. An attacker could inject malicious commands through the ifname parameter, leading to arbitrary command execution on the device. Potential attack vectors include:

• Remote Exploitation: An attacker can exploit the vulnerability over the network without needing physical access to the device.
• Man-in-the-Middle (MitM) Attacks: An attacker could intercept and modify network traffic to inject malicious commands.
• Phishing and Social Engineering: Tricking users into visiting malicious websites that exploit the vulnerability.

3. Affected Systems and Software Versions

The vulnerability specifically affects the Linksys E7350 router running firmware version 1.1.00.032. It is crucial to identify all devices running this firmware version within the network to assess the scope of the risk.

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 Linksys.
• Network Segmentation: Isolate affected devices on a separate network segment to limit potential damage.
• Firewall Rules: Implement strict firewall rules to restrict access to the router's management interface.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity targeting the router.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address similar issues.

5. Impact on European Cybersecurity Landscape

The presence of this vulnerability in a widely used consumer router model underscores the importance of robust cybersecurity measures in the European Union. The potential for widespread exploitation could lead to significant disruptions in home and small business networks, impacting the overall cybersecurity posture of the region. This highlights the need for:

• Enhanced Vendor Responsibility: Encouraging manufacturers to prioritize security in their products.
• Public Awareness: Educating consumers on the importance of keeping their devices updated.
• Regulatory Compliance: Ensuring compliance with EU cybersecurity regulations and standards.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerable Function: The apcli_do_enr_pin_wps function in the Linksys E7350 firmware version 1.1.00.032.
• Exploitation Method: Command injection via the ifname parameter.
• Detection: Monitor network traffic for unusual patterns targeting the router's management interface.
• Mitigation: Implement network-level protections and ensure firmware updates are applied promptly.
• References: For further technical details, refer to the GitHub repository provided in the EUVD entry: GitHub Link.

In conclusion, the command injection vulnerability in the Linksys E7350 router is a critical issue that requires immediate attention. By implementing the recommended mitigation strategies and staying vigilant, organizations and individuals can protect their networks from potential exploitation.