CVE-2023-26470 : What You Need to Know

This CVE-2023-26470 involves a vulnerability found in the XWiki Platform that allows for persistent Out-of-Memory (OOM) errors when saving a document with a large object number.

Understanding CVE-2023-26470

This vulnerability in XWiki Platform, identified by the advisory GHSA-92wp-r7hm-42g7, pertains to uncontrolled resource consumption, categorized under CWE-400.

What is CVE-2023-26470?

XWiki Platform, a versatile wiki platform that provides runtime services for applications, is susceptible to a flaw where saving a document with a significantly large object number, such as 67108863, can lead to the exhaustion of memory allocated to XWiki. This results in persistent OOM errors and renders the platform unusable whenever the affected document is manipulated. The issue has been addressed in XWiki version 14.0-rc-1.

The Impact of CVE-2023-26470

With a base severity of "MEDIUM" and a CVSSv3.1 base score of 5.7, this vulnerability has a low attack complexity and requires low privileges for exploitation. The availability impact is high, while there is no impact on confidentiality or integrity, and user interaction is required.

Technical Details of CVE-2023-26470

The following technical details summarize the vulnerability:

Vulnerability Description

The vulnerability in XWiki Platform allows an attacker to induce persistent OOM errors by saving a document with a large object number, leading to resource exhaustion and making the platform inoperable.

Affected Systems and Versions

Vendor: xwiki
Product: xwiki-platform
Affected Version: < 14.0-rc-1

Exploitation Mechanism

To exploit this vulnerability, an attacker can save a document with an exceptionally high object number, causing excessive resource consumption and triggering OOM errors.

Mitigation and Prevention

Given the severity and impact of CVE-2023-26470, it is crucial to implement security measures to mitigate the risks associated with this vulnerability.

Immediate Steps to Take

Users of XWiki Platform are advised to update their systems to version 14.0-rc-1 or later to address this vulnerability and prevent potential exploitation.

Long-Term Security Practices

Regularly monitoring and updating the XWiki Platform, implementing secure coding practices, and conducting security audits can help prevent similar vulnerabilities in the future.

Patching and Updates

Ensure timely installation of security patches and updates released by XWiki to stay protected against known vulnerabilities and enhance the overall security posture of the platform.