EUVD-2025-16883

Comprehensive Technical Analysis of EUVD-2025-16883

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability in Cisco Identity Services Engine (ISE) deployed on AWS, Microsoft Azure, and Oracle Cloud Infrastructure (OCI) allows unauthenticated, remote attackers to access sensitive data, execute limited administrative operations, modify system configurations, or disrupt services. This is due to improperly generated credentials shared across different Cisco ISE deployments on the same cloud platform and software release.

Severity Evaluation:

• Base Score: 9.9 (Critical)
• Base Score Version: CVSS 3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H

The high base score indicates a critical vulnerability with a significant impact on confidentiality, integrity, and availability. The attack vector is network-based (AV:N), requires low complexity (AC:L), no privileges (PR:N), and no user interaction (UI:N). The scope change (S:C) indicates that the vulnerability affects components beyond the security scope managed by the security authority introducing the vulnerability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Credential Extraction: An attacker can extract user credentials from a Cisco ISE deployment in the cloud.
• Unsecured Ports: The attacker can use these credentials to access other Cisco ISE deployments through unsecured ports.

Exploitation Methods:

• Credential Sharing: The attacker exploits the shared credentials across different deployments.
• Remote Access: The attacker gains unauthorized access to sensitive data, performs limited administrative operations, modifies system configurations, or disrupts services.

3. Affected Systems and Software Versions

Affected Software:

• Cisco Identity Services Engine Software versions:
  • 3.2.0 p6, 3.3 Patch 4, 3.0.0 p3, 3.1.0 p1, 3.2.0 p3, 3.2.0, 3.3 Patch 3, 3.2.0 p2, 3.0.0 p4, 3.1.0 p5, 3.2.0 p5, 3.2.0 p1, 3.3.0, 3.1.0 p6, 3.0.0 p6, 3.3 Patch 1, 3.0.0, 3.3 Patch 2, 3.0.0 p8, 3.3 Patch 5, 3.1.0 p4, 3.1.0, 3.0.0 p5, 3.0.0 p1, 3.0.0 p2, 3.1.0 p8, 3.4.0, 3.1.0 p7, 3.2.0 p7, 3.1.0 p9, 3.1.0 p10, 3.1.0 p3, 3.1.0 p2, 3.2.0 p4, 3.4 Patch 1, 3.0.0 p7

Affected Deployments:

• Cisco ISE deployments with the Primary Administration node in the cloud (AWS, Azure, OCI).

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Apply the latest patches and updates provided by Cisco for the affected software versions.
• Credential Management: Ensure unique and secure credentials are used for each deployment.
• Network Security: Implement strict network access controls and monitor for unauthorized access attempts.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits and vulnerability assessments.
• Incident Response Plan: Develop and maintain an incident response plan to quickly address any security breaches.
• User Training: Educate users on best practices for credential management and security awareness.

5. Impact on European Cybersecurity Landscape

Regulatory Compliance:

• GDPR: Potential breaches could result in non-compliance with GDPR, leading to significant fines and legal consequences.
• NIS Directive: Critical infrastructure providers using Cisco ISE must ensure compliance with the NIS Directive to avoid disruptions.

Economic Impact:

• Business Continuity: Disruptions in services could lead to financial losses and reputational damage.
• Data Breaches: Unauthorized access to sensitive data could result in data breaches, affecting customer trust and regulatory compliance.

6. Technical Details for Security Professionals

Detection and Monitoring:

• Log Analysis: Monitor logs for unauthorized access attempts and unusual activities.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious network activities.

Incident Response:

• Containment: Isolate affected systems to prevent further spread of the vulnerability.
• Eradication: Remove the vulnerability by applying patches and updating credentials.
• Recovery: Restore systems to a secure state and validate the integrity of data and configurations.

Preventive Measures:

• Access Controls: Implement strict access controls and multi-factor authentication (MFA).
• Encryption: Ensure data is encrypted both at rest and in transit.
• Regular Updates: Keep all systems and software up to date with the latest security patches.

Conclusion

The vulnerability in Cisco ISE deployments on cloud platforms is critical and requires immediate attention. Organizations must prioritize patching affected systems, implementing robust security measures, and ensuring compliance with regulatory requirements to mitigate risks and protect against potential attacks. Regular monitoring, auditing, and user training are essential for maintaining a secure cybersecurity posture.