EUVD-2024-55047

Comprehensive Technical Analysis of EUVD-2024-55047

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-55047 affects Nagios XI versions prior to 2024R1.1.3. The issue arises from the software's failure to invalidate all active sessions for a user when their password is changed. This insufficient session expiration allows any pre-existing sessions, including those potentially controlled by an attacker, to remain valid after a credential update.

Severity Evaluation:

• Base Score: 9.2
• Base Score Version: 4.0
• Base Score Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

The high base score of 9.2 indicates a critical vulnerability. The CVSS vector highlights that the attack vector (AV) is network-based (N), the attack complexity (AC) is low (L), and the attack requires physical interaction (AT:P). The vulnerability does not require privileges (PR:N) or user interaction (UI:N). The impact on confidentiality (VC:H) and integrity (VI:H) is high, while the impact on availability (VA:L) is low.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attacks: An attacker can exploit this vulnerability over the network without needing physical access to the system.
• Session Hijacking: An attacker who has already compromised a user's session can maintain access even after the user changes their password.

Exploitation Methods:

• Credential Theft: An attacker could steal a user's credentials and maintain access to the system by keeping the session active.
• Persistent Access: An attacker can continue to access sensitive data and perform unauthorized actions even after the user has changed their password.

3. Affected Systems and Software Versions

Affected Systems:

• Nagios XI versions prior to 2024R1.1.3

Software Versions:

• All versions of Nagios XI before 2024R1.1.3 are vulnerable to this issue.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update Software: Upgrade to Nagios XI version 2024R1.1.3 or later, which includes the fix for this vulnerability.
• Session Management: Implement additional session management controls to ensure all sessions are invalidated upon password change.

Long-Term Strategies:

• Regular Patching: Ensure that all software, including Nagios XI, is regularly updated to the latest versions.
• Monitoring and Logging: Implement robust monitoring and logging to detect and respond to unauthorized access attempts.
• User Education: Educate users on the importance of strong passwords and the need to change them regularly.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using Nagios XI for network monitoring and management. Given the critical nature of network monitoring tools, unauthorized access could lead to severe data breaches, loss of sensitive information, and potential disruption of services. This underscores the importance of timely patching and robust cybersecurity practices within the European cybersecurity landscape.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2024-13996
• Assigner: VulnCheck
• References:
  • Nagios Security Advisory
  • Nagios XI Changelog
  • VulnCheck Advisory
  • NVD Detail

Technical Recommendations:

• Session Management: Ensure that session management policies are enforced to invalidate all sessions upon password change.
• Access Controls: Implement strong access controls and multi-factor authentication (MFA) to enhance security.
• Incident Response: Develop and maintain an incident response plan to quickly address any unauthorized access attempts.

Conclusion: The vulnerability in Nagios XI versions prior to 2024R1.1.3 is critical and requires immediate attention. Organizations should prioritize updating their Nagios XI installations and implement robust session management practices to mitigate the risk of unauthorized access. The European cybersecurity landscape must remain vigilant and proactive in addressing such vulnerabilities to protect against potential data breaches and service disruptions.