EUVD-2024-39457

Comprehensive Technical Analysis of EUVD-2024-39457

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in EUVD-2024-39457 pertains to the "generate_app_certificates" function within the controllers/saml2/saml2.js file of FIWARE Keyrock versions up to and including 8.4. This vulnerability arises from improper neutralization of special elements used in OS commands, allowing authenticated users with application creation permissions to execute arbitrary commands.

Severity Evaluation:

• Base Score: 9.1
• Base Score Version: CVSS 3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

The high base score of 9.1 indicates a critical vulnerability. The CVSS vector breakdown reveals:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): High (H)
• User Interaction (UI): None (N)
• Scope (S): Changed (C)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

This vulnerability is critical due to its potential for significant impact on confidentiality, integrity, and availability, despite requiring high privileges.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Authenticated User Exploit: An authenticated user with permissions to create applications can exploit this vulnerability by embedding malicious OS commands within the organisationname field during application creation.
• Command Injection: The malicious input is not properly sanitized, leading to command injection where the embedded commands are executed by the underlying OS.

Exploitation Methods:

• Payload Crafting: An attacker crafts a payload with special characters and OS commands embedded in the organisationname field.
• Command Execution: Upon processing the malicious input, the generate_app_certificates function inadvertently executes the embedded commands, leading to unauthorized actions on the system.

3. Affected Systems and Software Versions

Affected Systems:

• FIWARE Keyrock versions up to and including 8.4.

Software Versions:

• All versions of FIWARE Keyrock from 0 to 8.4 are vulnerable.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Patching: Upgrade to a patched version of FIWARE Keyrock that addresses this vulnerability.
• Input Validation: Implement strict input validation and sanitization for the organisationname field to neutralize special elements.
• Least Privilege: Ensure that users have the minimum necessary permissions and review access controls.

Long-term Mitigation:

• Code Review: Conduct a thorough code review to identify and rectify similar vulnerabilities in other parts of the application.
• Security Training: Provide security training for developers to prevent future occurrences of command injection vulnerabilities.
• Regular Updates: Maintain a regular update schedule for all software components to ensure timely patching of vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability in FIWARE Keyrock, a widely used identity management platform in Europe, poses a significant risk to the European cybersecurity landscape. Organizations relying on FIWARE Keyrock for identity and access management could face severe security breaches, including data theft, unauthorized access, and system compromise. The high base score and the potential for command injection underscore the need for immediate attention and mitigation to safeguard critical infrastructure and sensitive data.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: generate_app_certificates
• File Path: controllers/saml2/saml2.js
• Input Field: organisationname
• Vulnerability Type: Command Injection

Exploitation Steps:

1. Authentication: Obtain authenticated access with application creation permissions.
2. Payload Construction: Craft a payload with embedded OS commands in the organisationname field.
3. Application Creation: Submit the payload through the application creation process.
4. Command Execution: The embedded commands are executed by the OS, leading to unauthorized actions.

Detection and Monitoring:

• Log Analysis: Monitor logs for unusual command execution patterns and anomalies.
• Intrusion Detection: Implement intrusion detection systems (IDS) to detect and alert on suspicious activities.
• Audit Trails: Maintain comprehensive audit trails to track user activities and identify potential exploitation attempts.

References:

• Security Advisory: AIT Security Advisories
• CVE ID: CVE-2024-42167

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risks associated with EUVD-2024-39457 and enhance their overall cybersecurity posture.