EUVD-2024-1338

Comprehensive Technical Analysis of EUVD-2024-1338

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability in XWiki Platform allows remote code execution (RCE) through a specially crafted document title, affecting the Solr-based search functionality. This vulnerability compromises the confidentiality, integrity, and availability of the XWiki installation.

Severity Evaluation:

• CVSS Base Score: 10.0
• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

The CVSS score of 10.0 indicates a critical vulnerability. The vector breakdown shows:

• 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 (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

This high severity is due to the ease of exploitation and the significant impact on the system's security.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Code Execution (RCE): An attacker can create a document with a specially crafted title to execute arbitrary Groovy code.
• Privilege Escalation: Any user with the ability to edit the title of a space (which is all users by default) can exploit this vulnerability.

Exploitation Methods:

• Crafted Document Title: An attacker can craft a document title that includes malicious Groovy code.
• Solr-based Search: The malicious code is executed during the Solr-based search process, leading to RCE.

3. Affected Systems and Software Versions

Affected Versions:

• XWiki Platform versions 7.2-rc-1 to 14.10.20
• 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 14.10.20
• XWiki 15.5.4
• XWiki 15.10 RC1

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Upgrade to the patched versions (14.10.20, 15.5.4, or 15.10 RC1).
• Workaround: Manually apply the patch to the Main.SolrSpaceFacet page if upgrading is not immediately possible.

Long-Term Strategies:

• Access Control: Restrict the ability to edit document titles to trusted users only.
• Monitoring: Implement monitoring and logging to detect any unusual activities related to document creation and editing.
• Regular Updates: Ensure that the XWiki Platform is regularly updated to the latest stable version.

5. Impact on European Cybersecurity Landscape

Impact Analysis:

• Widespread Use: XWiki Platform is widely used in various sectors, including education, government, and private enterprises.
• Critical Infrastructure: The vulnerability could be exploited to compromise critical infrastructure, leading to significant disruptions.
• Data Breaches: The RCE vulnerability can lead to data breaches, unauthorized access, and data manipulation.

Regulatory Compliance:

• GDPR: Organizations must ensure that personal data is protected, and any breach could result in regulatory penalties.
• NIS Directive: Critical infrastructure providers must comply with the Network and Information Systems (NIS) Directive, which mandates robust cybersecurity measures.

6. Technical Details for Security Professionals

Vulnerability Details:

• Root Cause: The vulnerability arises from insufficient input validation and sanitization of document titles, allowing the injection of malicious code.
• Exploitation: The malicious code is executed during the Solr-based search process, which does not properly sanitize the input.

Detection and Response:

• Intrusion Detection Systems (IDS): Implement IDS to detect unusual patterns in document creation and editing.
• Security Information and Event Management (SIEM): Use SIEM to correlate events and identify potential exploitation attempts.
• Incident Response: Develop an incident response plan that includes steps for containment, eradication, and recovery in case of an exploitation.

References:

• GitHub Advisory: GHSA-xm4h-3jxr-m3c6
• NVD Entry: CVE-2024-31984
• XWiki Jira: XWIKI-21471

Conclusion: The EUVD-2024-1338 vulnerability in XWiki Platform is critical and requires immediate attention. Organizations using affected versions should prioritize patching and implement robust security measures to mitigate the risk of exploitation. The impact on the European cybersecurity landscape underscores the importance of proactive cybersecurity practices and compliance with regulatory requirements.