EUVD-2024-0601

Comprehensive Technical Analysis of EUVD-2024-0601

1. Vulnerability Assessment and Severity Evaluation

The EUVD entry EUVD-2024-0601 describes a stored cross-site scripting (XSS) vulnerability in the Portal Search module's Search Result app in Liferay Portal and Liferay DXP. This vulnerability allows remote authenticated users to inject arbitrary web script or HTML into the search results if highlighting is disabled. The CVSS base score of 9.6 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H breaks down as follows:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal complexity.
• Privileges Required (PR): None (N) - No special privileges are required to exploit the vulnerability.
• User Interaction (UI): Required (R) - User interaction is required for the attack to succeed.
• Scope (S): Changed (C) - The vulnerability affects a different security scope.
• Confidentiality (C): High (H) - The vulnerability has a high impact on confidentiality.
• Integrity (I): High (H) - The vulnerability has a high impact on integrity.
• Availability (A): High (H) - The vulnerability has a high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves an authenticated user injecting malicious scripts into searchable content such as blogs, message board messages, or web content articles. When highlighting is disabled, these scripts can be executed in the context of other users viewing the search results. Potential exploitation methods include:

• Script Injection: Injecting JavaScript code that can steal session cookies, perform actions on behalf of the user, or redirect users to malicious sites.
• HTML Injection: Injecting HTML content that can alter the appearance of the search results or include malicious links.
• Phishing Attacks: Crafting search results to mimic legitimate content, leading users to enter sensitive information.

3. Affected Systems and Software Versions

The vulnerability affects the following versions of Liferay Portal and Liferay DXP:

• Liferay Portal: Versions 7.2.0 through 7.4.3.11, and older unsupported versions.
• Liferay DXP:
  • Version 7.4 before update 8
  • Version 7.3 before update 4
  • Version 7.2 before fix pack 17
  • Older unsupported versions

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following strategies are recommended:

• Update Software: Upgrade to the latest patched versions of Liferay Portal and Liferay DXP.
• Enable Highlighting: Ensure that highlighting is enabled in the Search Result app to prevent the injection of malicious scripts.
• Input Validation: Implement robust input validation and sanitization for all user-generated content.
• Content Security Policy (CSP): Use CSP headers to restrict the execution of unauthorized scripts.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using Liferay Portal and Liferay DXP, particularly those in the European Union. The potential for data breaches, unauthorized actions, and loss of user trust can have severe implications for compliance with regulations such as GDPR. Organizations must prioritize patching and implementing mitigation strategies to protect sensitive data and maintain compliance.

6. Technical Details for Security Professionals

• Vulnerability Type: Stored XSS
• Affected Component: Portal Search module's Search Result app
• Trigger Condition: Highlighting disabled in the Search Result app
• Exploitation: Injection of malicious scripts or HTML into searchable content
• Detection: Monitor for unusual script execution or HTML content in search results
• Response: Immediate patching and enabling of highlighting; review and sanitize all user-generated content

Conclusion

The stored XSS vulnerability in Liferay Portal and Liferay DXP, as described in EUVD-2024-0601, is a critical issue that requires immediate attention. Organizations should prioritize updating their software and implementing the recommended mitigation strategies to protect against potential exploitation. Regular security audits and adherence to best practices will help maintain a robust cybersecurity posture.