EUVD-2025-31113

Comprehensive Technical Analysis of EUVD-2025-31113

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Overview: The vulnerability in question pertains to code injection in Gardener Extensions for various cloud providers (AWS, Azure, OpenStack, and GCP). This issue allows an attacker with administrative privileges for a Gardener project to gain control over the seed cluster where the shoot cluster is managed.

Severity Evaluation: The vulnerability has a CVSS base score of 9.9, which is classified as critical. The CVSS vector CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H indicates the following:

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

This high severity score underscores the critical nature of the vulnerability, which can lead to significant impacts on confidentiality, 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.
• Privilege Escalation: An attacker with administrative privileges in a Gardener project can escalate their privileges to gain control over the seed cluster.

Exploitation Methods:

• Code Injection: The primary exploitation method involves injecting malicious code into the Gardener Extensions. This can be achieved through various means, such as manipulating configuration files or exploiting vulnerabilities in the codebase.
• Seed Cluster Control: Once the code is injected, the attacker can gain control over the seed cluster, which manages the shoot clusters. This control can be used to further compromise the entire Kubernetes environment.

3. Affected Systems and Software Versions

Affected Systems:

• Gardener Extensions for AWS providers prior to version 1.64.0
• Gardener Extensions for Azure providers prior to version 1.55.0
• Gardener Extensions for OpenStack providers prior to version 1.49.0
• Gardener Extensions for GCP providers prior to version 1.46.0

Software Versions:

• Any Gardener installation where Terraformer is used or can be enabled for infrastructure provisioning with any of the affected components.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Upgrade to the patched versions of Gardener Extensions:
  • AWS providers version 1.64.0
  • Azure providers version 1.55.0
  • OpenStack providers version 1.49.0
  • GCP providers version 1.46.0
• Access Control: Review and tighten access controls to ensure only authorized personnel have administrative privileges.
• Monitoring: Implement continuous monitoring to detect any unusual activities or unauthorized access attempts.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits and vulnerability assessments.
• Code Reviews: Implement stringent code review processes to identify and mitigate potential code injection vulnerabilities.
• Security Training: Provide ongoing security training for developers and administrators to raise awareness about secure coding practices and potential attack vectors.

5. Impact on European Cybersecurity Landscape

Regulatory Compliance:

• GDPR: The vulnerability could lead to unauthorized access to personal data, violating GDPR regulations.
• NIS Directive: Organizations in critical sectors must ensure the security and resilience of their networks and information systems, making this vulnerability a significant concern.

Economic Impact:

• Operational Disruption: Compromised Kubernetes clusters can lead to significant operational disruptions, affecting business continuity.
• Financial Losses: Data breaches and service outages can result in financial losses and reputational damage.

Cybersecurity Ecosystem:

• Supply Chain Risks: The vulnerability highlights the risks associated with third-party components and the importance of a secure supply chain.
• Collaborative Efforts: The European cybersecurity community must collaborate to share threat intelligence and best practices to mitigate such vulnerabilities.

6. Technical Details for Security Professionals

Vulnerability Details:

• Code Injection: The vulnerability allows for the injection of malicious code, which can be executed with elevated privileges.
• Privilege Escalation: The attacker can escalate privileges from administrative access in a Gardener project to control over the seed cluster.

Detection and Response:

• Log Analysis: Analyze logs for any unusual activities or code injection attempts.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and respond to potential exploitation attempts.
• Incident Response Plan: Develop and implement an incident response plan to quickly address any security breaches.

References:

• GitHub Advisories:
  • Gardener Extension Provider AWS
  • Gardener Extension Provider Azure
  • Gardener Extension Provider GCP
  • Gardener Extension Provider OpenStack
• NVD Entry: CVE-2025-59823

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