CVE-2021-23926 Explained : Impact and Mitigation

Apache XMLBeans up to version 2.6.0 is vulnerable to XML Entity Expansion attacks due to inadequately set properties in the XML parsers. This could lead to information disclosure.

Understanding CVE-2021-23926

What is CVE-2021-23926?

The XML parsers used by XMLBeans up to version 2.6.0 did not set the properties needed to protect the user from malicious XML input. Vulnerabilities include possibilities for XML Entity Expansion attacks. This vulnerability affects XMLBeans up to and including v2.6.0.

The Impact of CVE-2021-23926

The impact of CVE-2021-23926 includes the risk of information disclosure due to XML Entity Expansion attacks. Attackers could exploit this vulnerability to access sensitive data.

Technical Details of CVE-2021-23926

Vulnerability Description

The vulnerability in Apache XMLBeans allows attackers to perform XML Entity Expansion attacks, potentially leading to information disclosure.

Affected Systems and Versions

Apache XMLBeans version 2.6.0 and below are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious XML input to trigger XML Entity Expansion attacks, bypassing security protections.

Mitigation and Prevention

Immediate Steps to Take

Users are advised to update Apache XMLBeans to a patched version beyond 2.6.0 to mitigate the risk of XML Entity Expansion attacks and information disclosure.

Long-Term Security Practices

Employ strict input validation, avoid processing untrusted XML input, and stay informed about security updates from Apache Software Foundation.

Patching and Updates

Regularly check for security advisories from Apache and promptly apply patches to address known vulnerabilities.