CVE-2016-4043: Chameleon in Plone allows Authentication Bypass
Summary
CVE-2016-4043: Chameleon in Plone allows Authentication Bypass. Affects plone versions >= 5.0rc1, <= 5.0.4. No fix is published. How to fix ↓
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Background
Plone is an open-source content management system built on top of the Zope application server. It provides a robust and flexible platform for creating and managing websites, intranets, and web applications. Chameleon (five.pt) is a templating engine used in Plone for rendering HTML templates. It allows developers to create dynamic and customizable web pages. However, a vulnerability in Chameleon in Plone versions 5.0rc1 through 5.1a1 allows remote authenticated users to bypass Restricted Python by leveraging permissions to create or edit templates.
Vulnerability Detail
The vulnerability in Chameleon allows authenticated users to bypass Restricted Python, which is a security feature that limits the capabilities of Python code executed within a restricted context. By exploiting this vulnerability, an attacker with the necessary permissions can create or edit templates that execute arbitrary Python code, potentially leading to unauthorized access, data leakage, or other malicious activities. This vulnerability poses a moderate risk to Plone installations.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the security patches provided by the Plone development team to mitigate the risk.
Conclusion
The Chameleon vulnerability in Plone versions 5.0rc1 through 5.1a1 allows authenticated users to bypass Restricted Python and execute arbitrary code within templates. To mitigate this risk, it is crucial to upgrade to a patched version of Plone (5.1a2 or later) and review user permissions. Applying the provided security patches will help protect Plone installations from potential unauthorized access and data leakage. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Plone is an open-source content management system built on top of the Zope application server. It provides a robust and flexible platform for creating and managing websites, intranets, and web applications.
Chameleon is a templating engine used in Plone for rendering HTML templates. It allows developers to create dynamic and customizable web pages.
Restricted Python is a security feature in Plone that limits the capabilities of Python code executed within a restricted context. It helps prevent the execution of potentially malicious code.
An attacker with the necessary permissions can create or edit templates that execute arbitrary Python code, bypassing the restrictions imposed by Restricted Python. This can lead to unauthorized access, data leakage, or other malicious activities.
This vulnerability poses a moderate risk to Plone installations. It allows authenticated users with specific permissions to bypass Restricted Python and execute arbitrary code within templates.
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