EUVD-2024-1314

Comprehensive Technical Analysis of EUVD-2024-1314

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability in question affects the XWiki Platform, a generic wiki platform, and allows for remote code execution (RCE) via PDF export templates. This issue is present in versions starting from 3.0.1 up to, but not including, versions 4.10.20, 15.5.4, and 15.10-rc-1.

Severity Evaluation: The vulnerability has a CVSS Base Score of 10.0, which is the highest possible score, indicating a critical severity. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H breaks down as follows:

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

This indicates that the vulnerability can be exploited over the network with low complexity, requires low privileges, and does not need user interaction. The impact on confidentiality, integrity, and availability is high, and the scope of the vulnerability changes, affecting components beyond the initial vulnerable component.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attacks: Given the AV:N vector, attackers can exploit this vulnerability remotely over the network.
• PDF Export Templates: The primary attack vector involves manipulating PDF export templates to inject and execute malicious code.

Exploitation Methods:

• Code Injection: Attackers can inject malicious code into the PDF export templates, which will be executed when the PDF is generated.
• Privilege Escalation: Once code execution is achieved, attackers can escalate privileges and gain control over the affected system.

3. Affected Systems and Software Versions

Affected Versions:

• XWiki Platform versions 3.0.1 to 4.10.20
• XWiki Platform versions 15.0-rc-1 to 15.5.4
• XWiki Platform versions 15.6-rc-1 to 15.10-rc-1

Patched Versions:

• XWiki Platform 14.10.20
• XWiki Platform 15.5.4
• XWiki Platform 15.10-rc-1

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Upgrade: The most effective mitigation is to upgrade to the patched versions: 14.10.20, 15.5.4, or 15.10-rc-1.
• Block PDF Templates: If upgrading is not immediately possible, administrators can create the document XWiki.PDFClass and block its edition, ensuring it does not contain a style attribute.

Long-Term Mitigation:

• Regular Patching: Implement a regular patching and update schedule to ensure all software is up-to-date.
• Access Controls: Limit access to PDF export templates to trusted users only.
• Monitoring: Implement monitoring and logging to detect any suspicious activities related to PDF export templates.

5. Impact on European Cybersecurity Landscape

Regional Impact:

• Widespread Use: XWiki Platform is widely used in various sectors, including education, government, and private enterprises. A critical vulnerability in such a platform can have far-reaching consequences.
• Data Breaches: The high impact on confidentiality, integrity, and availability means that data breaches, unauthorized access, and service disruptions are likely outcomes if the vulnerability is exploited.
• Compliance Risks: Organizations may face compliance risks, especially under regulations like GDPR, if sensitive data is compromised.

Mitigation Efforts:

• Coordinated Response: European cybersecurity agencies should coordinate with organizations to ensure timely patching and mitigation.
• Awareness Campaigns: Increase awareness among IT administrators and security professionals about the criticality of this vulnerability and the importance of immediate action.

6. Technical Details for Security Professionals

Technical Insights:

• Vulnerability Type: Remote Code Execution (RCE)
• Affected Component: PDF export templates
• Exploitation Conditions: Low complexity, low privileges required, no user interaction needed.
• Impact: High impact on confidentiality, integrity, and availability.

References:

• GitHub Advisory: GHSA-vxwr-wpjv-qjq7
• NVD Entry: CVE-2024-31981
• XWiki Platform Repository: XWiki Platform GitHub
• Jira Issue: XWIKI-21337

Conclusion: The vulnerability EUVD-2024-1314 in the XWiki Platform is critical and requires immediate attention. Organizations using affected versions should prioritize upgrading to patched versions or implementing the recommended mitigation strategies to prevent potential exploitation. The European cybersecurity landscape must be vigilant and proactive in addressing this vulnerability to safeguard against potential data breaches and service disruptions.