CVE-2023-29524 : Exploit Details and Defense Strategies

A critical vulnerability has been discovered in the XWiki Platform that allows attackers to inject malicious code through the XWiki.SchedulerJobSheet component. This could lead to code execution on the server and poses a significant risk to confidentiality, integrity, and availability.

Understanding CVE-2023-29524

This vulnerability, assigned CVE-2023-29524, has a base severity score of 10 (Critical) according to the CVSS v3.1 metrics. It falls under CWE-74, highlighting the improper neutralization of special elements leading to code injection.

What is CVE-2023-29524?

The vulnerability in XWiki Platform allows users to execute arbitrary code using the Scheduler Application sheet page, even without script or programming rights. By adding a new object of type XWiki.SchedulerJobClass with groovy code in the "Job Script", attackers can execute code in the server context upon viewing.

The Impact of CVE-2023-29524

With a high base score and severity level, this vulnerability has a critical impact on the affected systems. Attackers can exploit this flaw to compromise data confidentiality, integrity, and availability, potentially leading to complete system takeover.

Technical Details of CVE-2023-29524

The vulnerable component is XWiki.SchedulerJobSheet in xwiki-platform versions less than 14.10.3. Users running older versions are at risk of exploitation and are strongly advised to upgrade to a secure version.

Vulnerability Description

The root cause of the vulnerability lies in the improper handling of user inputs, allowing malicious code injection. Attackers can leverage this flaw to achieve remote code execution on the server, bypassing normal security mechanisms.

Affected Systems and Versions

Vendor: XWiki
Product: xwiki-platform
Affected Versions: < 14.10.3

Exploitation Mechanism

By manipulating the object editor and adding a new object of type XWiki.SchedulerJobClass with malicious code, attackers can execute arbitrary commands and scripts on the server.

Mitigation and Prevention

To safeguard against CVE-2023-29524, immediate actions need to be taken to mitigate the risk and prevent potential exploitation.

Immediate Steps to Take

Upgrade to XWiki version 14.10.3 or higher to patch the vulnerability and secure your system against code injection attacks.

Long-Term Security Practices

Regularly update XWiki Platform to the latest secure versions to prevent known vulnerabilities and apply security patches promptly.

Patching and Updates

Stay informed about security advisories and patches released by XWiki to address critical vulnerabilities and ensure the ongoing security of your platform.