EUVD-2024-3481

Comprehensive Technical Analysis of EUVD-2024-3481

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-3481 affects the XWiki Platform, a generic wiki platform, specifically in versions starting from 3.3-milestone-1 up to 15.10.9 and 16.3.0. The vulnerability allows any user to execute arbitrary code on the server, provided the Extension Repository Application is installed. This issue has been assigned a CVSS Base Score of 10.0, indicating a critical severity level.

CVSS Vector Breakdown:

• Attack Vector (AV:N): The vulnerability can be exploited over the network.
• Attack Complexity (AC:L): The attack requires low complexity.
• Privileges Required (PR:L): The attacker needs low privileges to exploit the vulnerability.
• User Interaction (UI:N): No user interaction is required.
• Scope (S:C): The vulnerability affects components beyond the security scope managed by the security authority.
• Confidentiality (C:H): High impact on confidentiality.
• Integrity (I:H): High impact on integrity.
• Availability (A:H): High impact on availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves exploiting the Extension Repository Application to execute arbitrary code. An attacker with minimal privileges can leverage this vulnerability to gain unauthorized access to the server, potentially leading to data breaches, unauthorized modifications, or denial of service.

Exploitation Methods:

• Code Injection: An attacker can inject malicious code through the Extension Repository Application.
• Privilege Escalation: Once code execution is achieved, the attacker can escalate privileges to gain full control over the server.
• Data Exfiltration: The attacker can exfiltrate sensitive data stored on the server.

3. Affected Systems and Software Versions

The vulnerability affects the following versions of the XWiki Platform:

• Versions starting from 3.3-milestone-1 up to 15.10.9.
• Versions starting from 16.0.0-rc-1 up to 16.3.0.

Note: The Extension Repository Application must be installed for the vulnerability to be exploitable.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Disable the Extension Repository Application: If the application is not in use, it can be safely disabled to mitigate the risk.
• Apply Patches: Manually apply the patches from commit 8659f17d500522bf33595e402391592a35a162e8 to the pages ExtensionCode.ExtensionSheet and ExtensionCode.ExtensionAuthorsDisplayer.

Long-Term Mitigation:

• Update to the Latest Version: Upgrade to XWiki versions 15.10.9 or 16.3.0, which include the fix for this vulnerability.
• Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential risks.
• Access Controls: Implement strict access controls and monitor user activities to detect and respond to suspicious behavior.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using the XWiki Platform within the European Union. Given the critical nature of the vulnerability, it could lead to severe data breaches, financial losses, and reputational damage. The high CVSS score underscores the urgency for immediate action to mitigate the risk.

Regulatory Compliance:

• Organizations must ensure compliance with GDPR and other relevant regulations to protect personal data.
• Prompt patching and mitigation are essential to avoid potential legal and financial repercussions.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2024-55662
• GHSA ID: GHSA-j2pq-22jj-4pm5
• Affected Component: Extension Repository Application
• Exploitability: The vulnerability can be exploited remotely with low complexity and minimal privileges.

Patch Information:

• Commit ID: 8659f17d500522bf33595e402391592a35a162e8
• Patched Pages: ExtensionCode.ExtensionSheet and ExtensionCode.ExtensionAuthorsDisplayer

References:

• GitHub Security Advisory
• NVD Entry
• GitHub Commit
• XWiki Jira Issue

Conclusion: The vulnerability in the XWiki Platform is critical and requires immediate attention. Organizations should prioritize updating to the patched versions or applying the recommended mitigations to protect their systems from potential exploitation. Regular monitoring and security assessments are crucial to maintaining a robust cybersecurity posture.