CVE-2021-21656 Explained : Impact and Mitigation

Jenkins Xcode integration Plugin version 2.0.14 and earlier is vulnerable to XML external entity (XXE) attacks due to a misconfiguration in its XML parser.

Understanding CVE-2021-21656

This CVE affects the Jenkins Xcode integration Plugin, specifically versions up to 2.0.14, leaving systems at risk of XXE attacks.

What is CVE-2021-21656?

CVE-2021-21656 refers to the vulnerability in the Jenkins Xcode integration Plugin that allows attackers to exploit XML external entities.

The Impact of CVE-2021-21656

The vulnerability could lead to sensitive data exposure, unauthorized access, and potential system compromise in affected versions of the plugin.

Technical Details of CVE-2021-21656

The following are the technical details related to CVE-2021-21656:

Vulnerability Description

Jenkins Xcode integration Plugin 2.0.14 and earlier versions do not properly configure their XML parser, making them susceptible to XXE attacks.

Affected Systems and Versions

Systems running Jenkins Xcode integration Plugin versions less than or equal to 2.0.14 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious XML payloads to trigger XXE attacks, potentially leading to data leaks and unauthorized access.

Mitigation and Prevention

To protect your systems from CVE-2021-21656, consider the following mitigation strategies:

Immediate Steps to Take

Update Jenkins Xcode integration Plugin to a non-vulnerable version.
Apply patches released by the Jenkins project to address the XXE vulnerability.

Long-Term Security Practices

Implement secure coding practices to prevent XXE vulnerabilities in plugins and applications.

Patching and Updates

Regularly check for security updates and patches from Jenkins to address known vulnerabilities and ensure system security.