CVE-2024-42167

Comprehensive Technical Analysis of CVE-2024-42167

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-42167

Description: The vulnerability resides in the "generate_app_certificates" function within the controllers/saml2/saml2.js file of FIWARE Keyrock versions up to and including 8.4. The function fails to properly sanitize special elements used in OS commands, allowing authenticated users with application creation permissions to execute arbitrary commands by crafting a malicious organisationname.

CVSS Score: 9.1

Severity Evaluation:

• Critical: The high CVSS score of 9.1 indicates a critical vulnerability. This is due to the potential for remote code execution (RCE), which can lead to significant impacts such as data breaches, system compromise, and loss of service integrity.
• Authentication Requirement: Although the vulnerability requires authentication, the permissions needed (application creation) are not uncommon for many users within an organization, increasing the risk.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Authenticated User Exploitation: An attacker with valid credentials and permissions to create applications can exploit this vulnerability.
• Malicious Application Creation: By embedding special characters or commands within the organisationname field, an attacker can trigger the execution of arbitrary OS commands.

Exploitation Methods:

• Command Injection: The primary exploitation method involves injecting OS commands into the organisationname field. This can be achieved by crafting a payload that includes command sequences that the underlying OS will execute.
• Privilege Escalation: Once the attacker gains the ability to execute commands, they can escalate privileges, access sensitive data, or disrupt services.

3. Affected Systems and Software Versions

Affected Software:

• FIWARE Keyrock versions up to and including 8.4.

Systems:

• Any system running the affected versions of FIWARE Keyrock, particularly those with the SAML2 authentication module enabled.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Upgrade to a patched version of FIWARE Keyrock that addresses this vulnerability.
• Access Control: Limit the number of users with application creation permissions to the minimum necessary.
• Monitoring: Implement monitoring and alerting for unusual command executions or application creation activities.

Long-Term Strategies:

• Code Review: Conduct thorough code reviews to identify and mitigate similar vulnerabilities in other parts of the codebase.
• Input Validation: Enhance input validation and sanitization mechanisms to prevent command injection attacks.
• Security Training: Provide security training for developers to ensure they are aware of common vulnerabilities and best practices for secure coding.

5. Impact on Cybersecurity Landscape

Broader Implications:

• Supply Chain Risk: Vulnerabilities in widely-used software like FIWARE Keyrock can have cascading effects across multiple organizations and industries.
• Trust and Reputation: Organizations relying on FIWARE Keyrock for identity management may face trust and reputation issues if this vulnerability is exploited.
• Compliance: Failure to address such vulnerabilities can lead to non-compliance with regulatory requirements, resulting in legal and financial penalties.

6. Technical Details for Security Professionals

Vulnerability Details:

• Location: controllers/saml2/saml2.js
• Function: generate_app_certificates
• Issue: Improper neutralization of special elements in OS commands.

Exploitation Example:

// Malicious organisationname payload
const organisationname = "example; rm -rf /";

// Function call with malicious input
generate_app_certificates(organisationname);

Mitigation Code Example:

// Sanitize input to prevent command injection
function sanitizeInput(input) {
    // Implement proper sanitization logic
    return input.replace(/[;`&|]/g, '');
}

// Modified function with input sanitization
function generate_app_certificates(organisationname) {
    const sanitizedName = sanitizeInput(organisationname);
    // Proceed with certificate generation using sanitizedName
}

References:

• Security Advisories

By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of exploitation and maintain the integrity and security of their systems.