Description
Nagios XI versions prior to 2024R1.1.3 contain a privilege escalation vulnerability in which an authenticated administrator could leverage the Migrate Server feature to obtain root privileges on the underlying XI host. By abusing the migration workflow, an admin-level attacker could execute actions outside the intended security scope of the application, resulting in full control of the operating system.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2024-55063
1. Vulnerability Assessment and Severity Evaluation
Vulnerability Description: Nagios XI versions prior to 2024R1.1.3 contain a privilege escalation vulnerability. An authenticated administrator can exploit the Migrate Server feature to obtain root privileges on the underlying XI host. This allows the attacker to execute actions outside the intended security scope, resulting in full control of the operating system.
Severity Evaluation:
The vulnerability has a CVSS Base Score of 9.4, which is considered critical. The CVSS vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H indicates the following:
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Authentication (AT): None (N)
- Privileges Required (PR): High (H)
- User Interaction (UI): None (N)
- Confidentiality (VC), Integrity (VI), Availability (VA): High (H)
- Scope Change (SC), Scope Integrity (SI), Scope Availability (SA): High (H)
This high severity score underscores the critical nature of the vulnerability, particularly in environments where Nagios XI is used for monitoring critical infrastructure.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Authenticated Administrator Access: The attacker must have admin-level access to the Nagios XI interface.
- Migrate Server Feature Abuse: The attacker exploits the Migrate Server feature to escalate privileges to root.
Exploitation Methods:
- Migrate Server Workflow Manipulation: The attacker manipulates the migration workflow to execute commands with elevated privileges.
- Command Injection: The attacker injects malicious commands during the migration process to gain root access.
3. Affected Systems and Software Versions
Affected Systems:
- Nagios XI versions prior to 2024R1.1.3
Software Versions:
- All versions of Nagios XI before the patch release 2024R1.1.3 are vulnerable.
4. Recommended Mitigation Strategies
Immediate Actions:
- Update Software: Upgrade to Nagios XI version 2024R1.1.3 or later.
- Access Control: Restrict administrative access to trusted personnel only.
- Monitoring: Implement additional monitoring for unusual administrative activities.
Long-Term Strategies:
- Regular Patching: Ensure that all monitoring and management tools are regularly updated.
- Least Privilege Principle: Enforce the principle of least privilege for all user accounts.
- Security Audits: Conduct regular security audits and vulnerability assessments.
5. Impact on European Cybersecurity Landscape
Impact Analysis:
- Critical Infrastructure: Nagios XI is widely used in critical infrastructure monitoring, making this vulnerability a significant risk.
- Data Integrity and Confidentiality: Compromised systems could lead to data breaches and loss of integrity.
- Operational Disruption: Full control of the operating system could result in operational disruptions and potential service outages.
Regulatory Compliance:
- GDPR: Organizations must ensure that personal data is protected, and any breach could result in regulatory penalties.
- NIS Directive: Critical infrastructure operators must comply with the Network and Information Systems Directive, ensuring robust cybersecurity measures.
6. Technical Details for Security Professionals
Technical Insights:
- Vulnerability Mechanism: The Migrate Server feature in Nagios XI allows for the transfer of configurations and settings between servers. The vulnerability arises from insufficient validation and sanitization of inputs during this process.
- Exploitation Steps:
- Admin Access: Obtain admin-level access to the Nagios XI interface.
- Initiate Migration: Start the migration process.
- Inject Commands: Inject malicious commands during the migration to escalate privileges.
- Gain Root Access: Execute commands with root privileges to gain full control of the system.
Detection and Response:
- Log Analysis: Monitor logs for unusual migration activities and command executions.
- Intrusion Detection Systems (IDS): Implement IDS to detect and alert on suspicious activities.
- Incident Response Plan: Develop and maintain an incident response plan tailored to privilege escalation scenarios.
Conclusion: The privilege escalation vulnerability in Nagios XI versions prior to 2024R1.1.3 poses a significant risk to organizations relying on this tool for monitoring. Immediate patching and adherence to best security practices are crucial to mitigate this threat. The European cybersecurity landscape must remain vigilant, ensuring compliance with regulatory standards and maintaining robust security measures to protect critical infrastructure.
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