CVE-2021-43576: XXE vulnerability in Jenkins pom2config Plugin
Summary
CVE-2021-43576: XXE vulnerability in Jenkins pom2config Plugin. Affects org.jenkins-ci.plugins:pom2config versions < 1.2. No fix is published. How to fix ↓
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Background
The Jenkins pom2config Plugin is a Maven plugin that allows users to generate a configuration file from a Maven pom.xml file. It is commonly used in Jenkins pipelines to automate the configuration process. The plugin parses the XML file and extracts relevant information to generate the configuration. However, versions 1.2 and earlier of the plugin do not properly configure the XML parser, making it vulnerable to XML external entity (XXE) attacks. This vulnerability allows attackers with certain permissions to exploit the plugin and potentially extract sensitive information from the Jenkins controller or perform server-side request forgery.
Vulnerability Detail
The XXE vulnerability in the Jenkins pom2config Plugin arises from the plugin's failure to configure its XML parser to prevent XXE attacks. This allows attackers with Overall/Read and Item/Read permissions to manipulate the plugin into parsing a specially crafted XML file that contains external entities. By leveraging these entities, an attacker can extract secrets from the Jenkins controller or perform server-side request forgery. The impact of this vulnerability is significant, as it can lead to unauthorized access to sensitive information and potential compromise of the Jenkins environment.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As there is no fix currently available, users are advised to consider the following workaround:
- Temporarily disable or remove the pom2config Plugin from the Jenkins environment.
- Implement alternative methods for generating configuration files, such as manually creating them or using other plugins that are not affected by the XXE vulnerability.
Please note that this workaround may impact the automation and functionality of Jenkins pipelines that rely on the pom2config Plugin.
Conclusion
The XXE vulnerability in the Jenkins pom2config Plugin poses a significant risk to Jenkins environments using affected versions of the plugin. As there is currently no fix available, it is important to stay informed about official Jenkins security advisories and apply a fixed version as soon as it becomes available. In the meantime, consider implementing the provided workaround and following security best practices to mitigate the risk. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The XXE vulnerability in the Jenkins pom2config Plugin can allow attackers to extract sensitive information from the Jenkins controller or perform server-side request forgery. This can lead to unauthorized access to confidential data and potential compromise of the Jenkins environment.
Users of Jenkins who have installed and are using versions 1.2 and earlier of the pom2config Plugin are affected by this vulnerability. Specifically, attackers with Overall/Read and Item/Read permissions can exploit this vulnerability.
At the time of this advisory's publication, there is no fix available for the XXE vulnerability in the Jenkins pom2config Plugin. It is recommended to monitor official Jenkins security advisories for updates and apply a fixed version as soon as it becomes available.
Yes, users can temporarily disable or remove the pom2config Plugin from their Jenkins environment. They can also explore alternative methods for generating configuration files that are not affected by the XXE vulnerability.
To protect your Jenkins environment, it is recommended to follow security best practices, such as restricting permissions, implementing proper input validation, and staying updated with the latest security patches and fixes. Regularly monitoring official Jenkins security advisories is also crucial.
