EUVD-2024-53520

Comprehensive Technical Analysis of EUVD-2024-53520

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability in utils-extend version 1.0.8 allows for Prototype Pollution through the lib.extend function. This can be exploited by an attacker to introduce or modify properties within the global prototype chain, leading to a denial of service (DoS) at a minimum.

Severity Evaluation:

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

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

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

This vulnerability is severe due to its low complexity, lack of required privileges, and the high impact on integrity and availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attacks: Given the attack vector is network-based, an attacker can exploit this vulnerability remotely without needing local access.
• Web Applications: Web applications using the vulnerable utils-extend library are particularly at risk, as attackers can craft malicious payloads to be processed by the application.

Exploitation Methods:

• Prototype Pollution: An attacker can send a specially crafted payload that sets properties on Object.prototype, affecting all objects in the application. This can lead to unintended behavior, including DoS.
• Payload Injection: The attacker can inject a payload that modifies the prototype chain, causing widespread disruption in the application's functionality.

3. Affected Systems and Software Versions

Affected Software:

• utils-extend version 1.0.8

Potentially Affected Systems:

• Any system or application that uses the utils-extend library version 1.0.8.
• Web applications, server-side applications, and any other software that integrates this library.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update or Patch: Immediately update to a patched version of utils-extend if available. If not, consider using an alternative library that does not have this vulnerability.
• Input Validation: Implement strict input validation to prevent malicious payloads from being processed.
• Sanitization: Sanitize all inputs to ensure that they do not contain properties that can pollute the prototype chain.

Long-Term Strategies:

• Code Review: Conduct a thorough code review to identify and mitigate similar vulnerabilities in other parts of the application.
• Security Training: Educate developers on the risks of prototype pollution and best practices for secure coding.
• Regular Updates: Ensure that all libraries and dependencies are regularly updated to their latest versions.

5. Impact on European Cybersecurity Landscape

Regulatory Compliance:

• Organizations must comply with regulations such as GDPR, which mandates the protection of personal data. This vulnerability could lead to data breaches, resulting in regulatory penalties.

Economic Impact:

• The exploitation of this vulnerability can lead to significant financial losses due to service disruptions and potential data breaches.

Reputation Risk:

• Organizations that fail to address this vulnerability risk reputational damage, as customers and partners may lose trust in their ability to secure data and services.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: lib.extend
• Exploitation Mechanism: The attacker can supply a payload with Object.prototype setter to introduce or modify properties within the global prototype chain.

Detection and Monitoring:

• Logging: Implement comprehensive logging to detect unusual modifications to the prototype chain.
• Intrusion Detection Systems (IDS): Use IDS to monitor for suspicious network activity that may indicate an attempt to exploit this vulnerability.

Mitigation Code Example:

function safeExtend(target, source) {
    for (let key in source) {
        if (source.hasOwnProperty(key) && key !== '__proto__') {
            target[key] = source[key];
        }
    }
    return target;
}

Conclusion: The vulnerability in utils-extend version 1.0.8 is critical and requires immediate attention. Organizations should prioritize updating the library, implementing robust input validation, and conducting thorough security reviews to mitigate the risk. The potential impact on the European cybersecurity landscape underscores the importance of proactive measures to safeguard against such vulnerabilities.

References:

• GitHub Gist
• CVE ID: CVE-2024-57077
• Assigner: Mitre

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