XSS Vulnerability in Python Aiohttp Package: CVE-2024-27306
Summary
UBUNTU-CVE-2024-27306: aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Affects python-aiohttp versions < 3.0.1-1ubuntu0.1~esm5. Fixed in 3.0.1-1ubuntu0.1~esm5. How to fix ↓
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Background
The Python Aiohttp package is an asynchronous HTTP client/server framework designed for asyncio and Python. It enables developers to build web applications and services that can handle multiple requests concurrently, making it efficient for I/O-bound tasks. The package is widely used for its simplicity and performance, but it has recently been identified as vulnerable to a cross-site scripting (XSS) attack, particularly in its handling of static file serving.
Vulnerability Detail
The vulnerability, identified as CVE-2024-27306, arises from improper handling of static file requests, specifically on index pages. This flaw allows attackers to inject malicious scripts into the web application, potentially compromising user data and session integrity. The vulnerability is particularly concerning for applications that do not implement a reverse proxy server, which is recommended for serving static files. If exploited, this vulnerability could lead to unauthorized access to sensitive information and a breach of user trust.
How To Fix
Minimum fixed version
3.0.1-1ubuntu0.1~esm5
This is the first release that contains the fix.
sudo apt-get install --only-upgrade python-aiohttpTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading is not immediately feasible, users can implement a workaround by disabling the 'show_index' feature in their Aiohttp configuration. This can be done by modifying the server settings as follows:
app.router.add_static('/static/', path='static', show_index=False)
This change will prevent the display of index pages that could be exploited by attackers.
Conclusion
The CVE-2024-27306 vulnerability in the Python Aiohttp package poses significant risks to web applications that utilize this framework for serving static files. It is crucial for developers to update their packages to the latest patched versions and consider implementing recommended workarounds to safeguard their applications against potential attacks.
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FAQ
CVE-2024-27306 is a cross-site scripting (XSS) vulnerability found in the Python Aiohttp package, affecting its static file handling.
You can check if your application is affected by using the Vulert playground at Vulert Scanner, which allows you to monitor for open-source vulnerabilities without needing to sign up.
Exploitation of this vulnerability could lead to unauthorized access to user data, session hijacking, and a loss of user trust in the application.
Yes, a patched version of the Aiohttp package is available. Users should update to version 3.9.4 or later to mitigate the risk.
As a temporary measure, you can disable the 'show_index' feature in your Aiohttp configuration to reduce the risk of exploitation.
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