CVE-2023-29510

Comprehensive Technical Analysis of CVE-2023-29510

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2023-29510 CVSS Score: 9.9

The vulnerability in XWiki Platform allows remote code execution (RCE) due to the lack of proper escaping in user-defined translations. This vulnerability is critical, as indicated by its high CVSS score of 9.9. The severity is amplified by the fact that any user with edit access to at least one document (which includes their own profile by default) can exploit this vulnerability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• User-Defined Translations: An attacker can add malicious translations that are included in privileged contexts without proper escaping.
• Edit Access: The vulnerability can be exploited by any user with edit access, which is enabled by default for users on their own profiles.

Exploitation Methods:

• Injection of Malicious Code: An attacker can inject malicious code through translations, which are then executed in a privileged context.
• Privilege Escalation: By exploiting this vulnerability, an attacker can gain higher privileges and perform unauthorized actions on the XWiki platform.

3. Affected Systems and Software Versions

Affected Versions:

• XWiki Platform versions prior to 14.10.2 and 15.0 RC1.

Unaffected Versions:

• XWiki Platform 14.10.2 and later.
• XWiki Platform 15.0 RC1 and later.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Upgrade: Upgrade to XWiki Platform 14.10.2 or 15.0 RC1, where the vulnerability has been patched.
• Access Control: Restrict edit access to trusted users only, especially for critical documents.

Long-Term Mitigation:

• Regular Updates: Ensure that the XWiki Platform is regularly updated to the latest version to benefit from security patches.
• Security Audits: Conduct regular security audits to identify and mitigate potential vulnerabilities.
• User Education: Educate users about the risks of adding untrusted translations and the importance of following security best practices.

5. Impact on Cybersecurity Landscape

The discovery and exploitation of CVE-2023-29510 highlight the importance of proper input validation and escaping in web applications. This vulnerability underscores the need for:

• Robust Security Practices: Ensuring that all user inputs are properly validated and escaped.
• Regular Patching: Keeping software up to date with the latest security patches.
• Access Control: Implementing strict access controls to minimize the attack surface.

6. Technical Details for Security Professionals

Vulnerability Details:

• Root Cause: The vulnerability arises from the lack of proper escaping in user-defined translations, which are included in privileged contexts.
• Exploitation: An attacker can inject malicious code through translations, leading to remote code execution.

Mitigation Implementation:

• Patch Details: The patch in XWiki 14.10.2 and 15.0 RC1 introduces a requirement for script rights to add translations with user scope. This effectively prevents regular users from exploiting the vulnerability, as they do not have script rights by default.

References:

• GitHub Commit
• GitHub Security Advisory
• Jira Issue Tracking

Conclusion

CVE-2023-29510 is a critical vulnerability in the XWiki Platform that allows remote code execution through improperly escaped user-defined translations. The high CVSS score of 9.9 underscores the urgency of addressing this issue. Organizations using XWiki should prioritize upgrading to the patched versions and implement strict access controls to mitigate the risk. This vulnerability serves as a reminder of the importance of robust security practices in web application development and maintenance.