Critical Header Parsing Vulnerability in Python Aiohttp Package
Summary
UBUNTU-CVE-2023-47627: aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Affects python-aiohttp versions 2.2.3-1build1 – 3.0.1-1ubuntu0.1~esm5. No fix is published. How to fix ↓
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Background
Python Aiohttp is an asynchronous HTTP client/server framework designed for asyncio and Python. It allows developers to create web applications and services that can handle multiple requests simultaneously without blocking. The package is widely used for building RESTful APIs and web applications due to its efficiency and ease of use. However, it has recently been identified as vulnerable to a critical issue related to header parsing, which could lead to serious security implications.
Vulnerability Detail
The vulnerability in the Aiohttp package arises from flaws in its HTTP parser, which can mishandle header parsing under certain conditions. This can lead to request smuggling attacks, where an attacker could manipulate HTTP requests to bypass security controls or inject malicious payloads. The issue is particularly concerning when the AIOHTTP_NO_EXTENSIONS flag is enabled or when a prebuilt wheel is not used. The vulnerability has been addressed in version 3.8.6, and users are strongly advised to upgrade to mitigate potential risks.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no known workarounds for this vulnerability. Users are advised to upgrade to the patched versions as soon as possible to ensure their applications are secure.
Conclusion
The Python Aiohttp package has a critical vulnerability related to header parsing that could lead to request smuggling attacks. Users are strongly encouraged to upgrade to the patched versions to protect their applications. Regular monitoring for vulnerabilities using tools like Vulert can help maintain security in open-source software.
See every vulnerability recorded for python-aiohttp →
FAQ
The CVSS score of this vulnerability is 5.3, indicating a medium severity level.
If exploited, this vulnerability could allow attackers to perform request smuggling, potentially bypassing security measures and injecting malicious content.
Yes, the vulnerability has been patched in version 3.8.6 of the Aiohttp package. Users should upgrade to this version or later.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. You can check your application using the Vulert playground without any signup.
While there are no workarounds available, it is crucial to prioritize upgrading the package to mitigate the risks associated with this vulnerability.
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