CVE-2023-45144

Comprehensive Technical Analysis of CVE-2023-45144

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2023-45144 CVSS Score: 10

The vulnerability in the com.xwiki.identity-oauth:identity-oauth-ui package allows for cross-site scripting (XSS) and XWiki syntax injection during the OAuth login process. This vulnerability can lead to remote code execution (RCE) via the Groovy macro, severely impacting the confidentiality, integrity, and availability of the XWiki installation.

Severity Evaluation:

• Critical: The CVSS score of 10 indicates a critical vulnerability. The potential for RCE, combined with the ease of exploitation through XSS and XWiki syntax injection, makes this a high-priority issue for immediate remediation.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Cross-Site Scripting (XSS): An attacker can inject malicious scripts into web pages viewed by other users. This can be achieved by manipulating the identityOAuth parameters sent in the GET request during the OAuth login process.
• XWiki Syntax Injection: The attacker can inject XWiki syntax, which can be interpreted and executed by the XWiki platform, leading to unauthorized actions.
• Remote Code Execution (RCE): By exploiting the Groovy macro, an attacker can execute arbitrary code on the server, gaining full control over the XWiki installation.

Exploitation Methods:

• Phishing: An attacker can craft a malicious OAuth login URL and distribute it to users, leading them to unknowingly execute the injected scripts or syntax.
• Direct Injection: An attacker with access to the OAuth login process can directly inject malicious code into the identityOAuth parameters.

3. Affected Systems and Software Versions

Affected Software:

• com.xwiki.identity-oauth:identity-oauth-ui versions prior to 1.6.

Affected Systems:

• Any XWiki installation using the vulnerable versions of the identity-oauth-ui package.

4. Recommended Mitigation Strategies

Immediate Actions:

• Upgrade: Upgrade to Identity OAuth version 1.6 or later, which includes the fix for this vulnerability.
• Monitoring: Implement monitoring for suspicious activities related to OAuth login processes and XWiki syntax execution.

Long-Term Strategies:

• Input Validation: Ensure robust input validation and sanitization for all user-supplied data, especially in OAuth login processes.
• Security Audits: Conduct regular security audits and code reviews to identify and mitigate similar vulnerabilities.
• User Education: Educate users about the risks of phishing and the importance of verifying the authenticity of login URLs.

5. Impact on Cybersecurity Landscape

Broader Implications:

• Supply Chain Security: This vulnerability highlights the importance of securing third-party libraries and dependencies, as they can introduce critical vulnerabilities into the main application.
• OAuth Security: It underscores the need for robust security measures in OAuth implementations, which are widely used for authentication and authorization.
• Wiki Platforms: Wiki platforms, which often allow user-generated content, are particularly vulnerable to injection attacks. Enhanced security measures are essential to protect these platforms.

6. Technical Details for Security Professionals

Vulnerability Details:

• Location: The vulnerability is located in the LoginUIExtension.vm file, specifically around line 58.
• Exploit: The identityOAuth parameters in the GET request are not properly sanitized, allowing for XSS and XWiki syntax injection.
• Patch: The fix involves proper sanitization and validation of the identityOAuth parameters to prevent injection attacks.

References:

• Patch Commit: GitHub Commit
• Vendor Advisory: GHSA-h2rm-29ch-wfmh
• Jira Issue: XWIKI-20719

Conclusion: CVE-2023-45144 is a critical vulnerability that requires immediate attention. Organizations using the affected versions of the identity-oauth-ui package should prioritize upgrading to the patched version and implement additional security measures to prevent similar issues in the future. The broader cybersecurity community should take note of the potential risks associated with OAuth implementations and third-party dependencies, emphasizing the need for continuous monitoring and robust security practices.