EUVD-2025-18922

Comprehensive Technical Analysis of EUVD-2025-18922

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-18922, also known as CVE-2025-6545, pertains to an Improper Input Validation issue in the pbkdf2 library, specifically within the lib/to-buffer.js file. This flaw allows for Signature Spoofing by Improper Validation, which can have severe implications for systems relying on the integrity of cryptographic operations.

Severity Evaluation:

• Base Score: 9.1 (Critical)
• Base Score Version: 4.0
• Base Score Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:H/SI:H/SA:H

The high base score indicates a critical vulnerability due to the potential for significant impact on confidentiality, integrity, and availability. The attack vector is network-based (AV:N), requires low complexity (AC:L), and can be exploited without user interaction (UI:N). The vulnerability has a high impact on integrity (VI:H) and availability (VA:H), and a low impact on confidentiality (VC:L).

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attacks: Given the network-based attack vector (AV:N), an attacker can exploit this vulnerability remotely.
• Signature Spoofing: The primary exploitation method involves crafting malicious input that bypasses the improper validation checks, leading to signature spoofing.

Exploitation Methods:

• Crafted Input: An attacker can send specially crafted input to the pbkdf2 library, exploiting the improper input validation to spoof signatures.
• Man-in-the-Middle (MitM) Attacks: An attacker could intercept and modify communications, exploiting the vulnerability to inject malicious data.

3. Affected Systems and Software Versions

The vulnerability affects the pbkdf2 library versions from 3.0.10 through 3.1.2. Systems and applications that rely on these versions of the pbkdf2 library for cryptographic operations are at risk. This includes but is not limited to:

• Web applications using the pbkdf2 library for password hashing.
• Cryptographic operations in Node.js applications.
• Any software that integrates the affected versions of the pbkdf2 library.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Library: Upgrade to a patched version of the pbkdf2 library that addresses the vulnerability.
• Input Validation: Implement additional input validation checks to mitigate the risk of improper validation.
• Monitoring: Enhance monitoring for suspicious activities related to cryptographic operations.

Long-Term Strategies:

• Code Review: Conduct thorough code reviews to identify and fix similar vulnerabilities.
• Security Training: Provide training for developers on secure coding practices and input validation techniques.
• Regular Updates: Ensure regular updates and patches for all dependencies and libraries used in the software.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and applications that rely on the pbkdf2 library for secure cryptographic operations. The potential for signature spoofing can undermine the trust and integrity of digital communications and transactions, leading to data breaches, financial losses, and reputational damage.

Regulatory Compliance:

• Organizations must ensure compliance with relevant regulations such as GDPR, which mandates robust security measures to protect personal data.
• Failure to address this vulnerability could result in regulatory penalties and legal consequences.

6. Technical Details for Security Professionals

Vulnerability Details:

• File Affected: lib/to-buffer.js
• Vulnerability Type: Improper Input Validation
• Impact: Signature Spoofing

References:

• GitHub Advisory: GHSA-h7cp-r72f-jxh6
• Commit References:
  • 9699045c37a07f8319cfb8d44e2ff4252d7a7078
  • e3102a8cd4830a3ac85cd0dd011cc002fdde33bb

Mitigation Steps:

1. Identify Affected Systems: Conduct an inventory to identify systems and applications using the vulnerable versions of the pbkdf2 library.
2. Patch Management: Implement a patch management process to update the pbkdf2 library to a secure version.
3. Testing: Conduct thorough testing to ensure that the updated library does not introduce new vulnerabilities or affect existing functionality.
4. Documentation: Document the mitigation steps and update security policies to reflect the changes.

By addressing this vulnerability promptly and comprehensively, organizations can mitigate the risk of exploitation and ensure the integrity and security of their cryptographic operations.