EUVD-2024-18147

Comprehensive Technical Analysis of EUVD-2024-18147

1. Vulnerability Assessment and Severity Evaluation

The vulnerability in the Cisco Nexus Dashboard Fabric Controller (NDFC) allows an authenticated, low-privileged, remote attacker to perform a command injection attack. This vulnerability arises from improper user authorization and insufficient validation of command arguments. The CVSS (Common Vulnerability Scoring System) base score of 9.9 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H highlights the following characteristics:

• 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 to exploit.
• Privileges Required (PR): Low (L) - The attacker needs low-level privileges to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
• Scope (S): Changed (C) - The vulnerability affects a component that is outside the security scope of the vulnerable component.
• 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 services.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves submitting crafted commands to the REST API endpoint or through the web UI of the Cisco NDFC. An attacker with low-privileged access can exploit this vulnerability to execute arbitrary commands on the CLI (Command Line Interface) of a Cisco NDFC-managed device with network-admin privileges. This can lead to:

• Command Injection: Executing arbitrary commands on the underlying system.
• Privilege Escalation: Gaining higher privileges than intended.
• Data Exfiltration: Accessing and exfiltrating sensitive data.
• Service Disruption: Causing denial of service (DoS) by disrupting network operations.

3. Affected Systems and Software Versions

The vulnerability affects multiple versions of the Cisco Data Center Network Manager, specifically:

• 12.1.3b
• 12.0.2f
• 12.0.1a
• 12.1.2p
• 12.1(1)
• 12.0.2d
• 12.1.1e
• 12.2.1
• 12.1.1
• 12.1.1p
• 12.1.2e

It is important to note that the vulnerability does not affect Cisco NDFC when configured for storage area network (SAN) controller deployment.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following strategies are recommended:

• Patch Management: Apply the latest security patches and updates provided by Cisco for the affected versions of the Cisco Data Center Network Manager.
• Access Control: Implement strict access control policies to limit the privileges of low-level users.
• Input Validation: Enhance input validation mechanisms to ensure that all command arguments are properly sanitized.
• Monitoring and Logging: Enable comprehensive monitoring and logging to detect and respond to any suspicious activities.
• Network Segmentation: Segment the network to limit the attack surface and contain potential threats.

5. Impact on European Cybersecurity Landscape

The critical nature of this vulnerability poses significant risks to organizations using the affected Cisco NDFC versions within the European Union. The potential for command injection and privilege escalation can lead to severe data breaches, service disruptions, and unauthorized access to critical infrastructure. This underscores the importance of timely patching and robust cybersecurity measures to protect against such threats.

6. Technical Details for Security Professionals

• Detection: Implement intrusion detection systems (IDS) and intrusion prevention systems (IPS) to detect and block suspicious activities related to command injection.
• Response: Develop an incident response plan that includes steps for identifying, containing, and remediating the vulnerability.
• Testing: Conduct regular penetration testing and vulnerability assessments to identify and address similar vulnerabilities.
• Compliance: Ensure compliance with relevant cybersecurity regulations and standards, such as GDPR and NIS Directive, to protect sensitive data and critical infrastructure.

By addressing this vulnerability promptly and effectively, organizations can enhance their cybersecurity posture and protect against potential threats.

References

For further details, refer to the Cisco Security Advisory: Cisco Security Advisory

Conclusion

The vulnerability in the Cisco Nexus Dashboard Fabric Controller (NDFC) is critical and requires immediate attention. By following the recommended mitigation strategies and maintaining a proactive cybersecurity approach, organizations can safeguard their systems and data from potential exploitation.