Denial of Service Vulnerabilities in Python Packages: python3.4 and python3.5
Summary
USN-5083-1: python3.4, python3.5 vulnerabilities. Affects python3.4 versions < 3.4.3-1ubuntu1~14.04.7+esm11. Fixed in 3.4.3-1ubuntu1~14.04.7+esm11. How to fix ↓
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Background
Python is a widely-used high-level programming language known for its readability and versatility. The specific packages, python3.4 and python3.5, are implementations of the Python programming language for Ubuntu systems. These packages provide essential libraries and tools for developers to build applications. However, they have been found to contain vulnerabilities that could lead to denial of service attacks, affecting the stability and availability of applications relying on them.
Vulnerability Detail
The vulnerabilities identified in python3.4 and python3.5 stem from improper handling of certain RFCs and server responses. Specifically, CVE-2021-3733 and CVE-2021-3737 allow attackers to exploit these flaws, potentially leading to denial of service conditions. This means that an attacker could send crafted requests that cause the Python interpreter to crash or become unresponsive, impacting any application that relies on these versions of Python.
How To Fix
Minimum fixed version
3.4.3-1ubuntu1~14.04.7+esm11
This is the first release that contains the fix.
sudo apt-get install --only-upgrade python3.4Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate patching is not feasible, consider isolating the affected applications from public access or implementing network-level protections to filter out malicious requests until the packages can be updated.
Conclusion
The vulnerabilities in python3.4 and python3.5 pose significant risks, particularly in terms of denial of service attacks. It is crucial for users to update their packages to the latest patched versions to mitigate these risks. Additionally, utilizing tools like Vulert can help monitor and manage vulnerabilities in your applications effectively.
See every vulnerability recorded for python3.4 →
FAQ
The vulnerabilities are related to improper handling of certain RFCs and server responses, which can lead to denial of service attacks.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Check your application using the Vulert playground at Vulert Scanner.
Consider implementing network-level protections or isolating the affected applications from public access until you can apply the updates.
While specific exploits may not be publicly disclosed, the nature of the vulnerabilities allows for potential denial of service attacks, making it crucial to apply patches.
You can refer to the Ubuntu Security Notices for detailed information on the vulnerabilities and their impact.
References
Related vulnerabilities
Recent vulnerabilities recorded for python3.4.
