CVE-2020-18701: Incorrect Access Control in Lin-CMS-Flask v0.1.1
Summary
CVE-2020-18701: Incorrect Access Control in Lin-CMS-Flask v0.1.1 allows remote attackers to obtain sensitive information and/or gain privileges due to the application not invalidating a user's authentication token upon logout, which all... Affects lin-cms versions 0.1.1a1 – 0.4.9. No fix is published. How to fix ↓
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Background
Lin-CMS is a Python package available on PyPI that provides a content management system (CMS) framework built with Flask. It allows developers to create and manage web applications with ease. Lin-CMS-Flask v0.1.1 is a specific version of Lin-CMS that is vulnerable to an incorrect access control issue.
Vulnerability Detail
The vulnerability in Lin-CMS-Flask v0.1.1 arises from the application's failure to invalidate a user's authentication token upon logout. This oversight enables remote attackers to obtain sensitive information and/or gain unauthorized privileges by replaying packets. By exploiting this vulnerability, an attacker could potentially access restricted resources or perform actions on behalf of other users.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, developers can manually implement a token invalidation mechanism upon user logout. This can be achieved by modifying the Lin-CMS-Flask codebase to ensure that authentication tokens are invalidated and no longer accepted after a user logs out. Here's an example of how this can be done in Python:
# Add the following code in the logout route of your Lin-CMS-Flask application
@app.route('/logout', methods=['POST'])
def logout():
# Invalidate the user's authentication token
current_user.token = None
db.session.commit()
return 'Logged out successfully'
Conclusion
In conclusion, Lin-CMS-Flask v0.1.1 is vulnerable to an incorrect access control issue that allows remote attackers to obtain sensitive information and gain unauthorized privileges. It is crucial to update to a secure version of Lin-CMS-Flask or apply the recommended workaround to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
Lin-CMS is a content management system (CMS) framework built with Flask, a Python web framework. It provides developers with tools and features to create and manage web applications efficiently.
This vulnerability allows remote attackers to obtain sensitive information and gain unauthorized privileges in Lin-CMS-Flask v0.1.1. They can replay packets to bypass access controls, potentially accessing restricted resources or performing actions on behalf of other users.
To fix this vulnerability, update your Lin-CMS-Flask dependency to a version that addresses the issue. Check for any available patches or newer versions released by the Lin-CMS maintainers.
As a temporary workaround, you can manually implement a token invalidation mechanism upon user logout. Modify the Lin-CMS-Flask codebase to ensure that authentication tokens are invalidated and no longer accepted after a user logs out.
You can find more information about Lin-CMS on its official website or the project's GitHub repository. Refer to the Lin-CMS documentation for detailed usage instructions and best practices.
References
Related vulnerabilities
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