EUVD-2023-37691

Comprehensive Technical Analysis of EUVD-2023-37691

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2023-37691 is a command injection flaw in the Netgear R6250 router with Firmware Version 1.0.4.48. This vulnerability allows an attacker with web management privileges to inject commands into the post request parameters, potentially gaining shell privileges.

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. The vector string highlights the following characteristics:

• 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 significant risk posed by this vulnerability, as it can be exploited remotely with low complexity and does not require user interaction.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability over the network without needing physical access to the device.
• Web Management Interface: The primary attack vector is through the web management interface of the router, where an attacker can inject malicious commands.

Exploitation Methods:

• Command Injection: By crafting specific post request parameters, an attacker can inject commands that the router's web management interface will execute.
• Shell Access: Successful exploitation can lead to gaining shell access, allowing the attacker to execute arbitrary commands on the router.

3. Affected Systems and Software Versions

Affected Systems:

• Netgear R6250 router

Affected Software Versions:

• Firmware Version 1.0.4.48

It is crucial to note that other versions of the firmware may also be affected, but this specific entry pertains to version 1.0.4.48.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Firmware Update: Users should immediately update the firmware to a version that addresses this vulnerability.
• Network Segmentation: Isolate the router from critical networks to limit the potential impact of an attack.
• Access Control: Restrict access to the web management interface to trusted IP addresses only.
• Monitoring: Implement monitoring to detect unusual activity on the router's web management interface.

Long-Term Mitigation:

• Regular Patching: Ensure that all network devices are regularly updated with the latest security patches.
• Security Audits: Conduct regular security audits to identify and mitigate potential vulnerabilities.
• User Education: Educate users on the importance of securing network devices and the risks associated with unpatched vulnerabilities.

5. Impact on European Cybersecurity Landscape

The presence of this vulnerability in a widely used consumer router underscores the importance of securing IoT devices. Given the critical nature of the vulnerability, it poses a significant risk to both individual users and organizations within the European Union. The potential for remote exploitation and the ease of execution make it a high-priority issue for cybersecurity professionals.

Regulatory Implications:

• GDPR Compliance: Organizations must ensure that their network infrastructure is secure to comply with GDPR regulations, which mandate the protection of personal data.
• NIS Directive: This vulnerability highlights the need for compliance with the Network and Information Systems (NIS) Directive, which aims to improve the cybersecurity capabilities of EU member states.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2023-33532
• GSD ID: GSD-2023-33532
• EPSS Score: 10 (indicating a high likelihood of exploitation)

Exploitation Steps:

1. Gain Web Management Access: The attacker must first gain access to the web management interface of the router.
2. Craft Malicious Post Request: The attacker crafts a post request with injected commands.
3. Execute Commands: The router processes the injected commands, potentially granting the attacker shell access.

References:

• Netgear Official Website
• Technical Report on Netgear R6250 RCE

Conclusion: This vulnerability represents a critical risk to users of the Netgear R6250 router. Immediate action is required to mitigate the risk, including updating the firmware and implementing robust security measures. The European cybersecurity landscape must prioritize the security of IoT devices to protect against such vulnerabilities.