Moderate Security Update for Python 3.9: Denial of Service Vulnerability in ZIP File Handling
Summary
ALSA-2024:9371: Moderate: python3.9 security update. Affects python-unversioned-command versions < 3.9.19-8.el9. Fixed in 3.9.19-8.el9. How to fix ↓
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Background
Python is a widely-used interpreted, interactive, object-oriented programming language known for its simplicity and versatility. It supports various programming paradigms and is equipped with extensive libraries and frameworks. The affected version, Python 3.9, is utilized in numerous applications and systems, making its security critical. The vulnerability in question arises from the way Python handles ZIP files, which can lead to potential Denial of Service (DoS) attacks if exploited.
Vulnerability Detail
The vulnerability identified as CVE-2024-8088 allows an attacker to create a malicious ZIP file that, when processed by Python's ZIP handling functionality, can cause the application to enter an infinite loop or consume excessive resources. This can lead to a Denial of Service, rendering the application unresponsive and potentially affecting other services relying on it. The issue stems from improper handling of certain ZIP file structures, making it essential for users to update their Python installations to mitigate this risk.
How To Fix
Minimum fixed version
3.9.19-8.el9
This is the first release that contains the fix.
sudo dnf update python-unversioned-commandTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, avoid processing ZIP files from untrusted sources until the update is applied. Additionally, consider implementing input validation to check the integrity of ZIP files before processing them.
Conclusion
The vulnerability CVE-2024-8088 in Python 3.9 poses a significant risk of Denial of Service through malicious ZIP file handling. Users are strongly advised to update to the patched version 3.9.19-8.el9 to mitigate this risk. For those unable to update immediately, implementing workarounds can help reduce exposure to potential attacks.
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FAQ
CVE-2024-8088 is a security vulnerability in Python 3.9 that can lead to Denial of Service when processing malicious ZIP files.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
Exploiting this vulnerability can cause applications to become unresponsive, leading to Denial of Service and potentially impacting other dependent services.
Yes, the patched version of Python 3.9 is 3.9.19-8.el9, which addresses this vulnerability.
If immediate updates are not possible, avoid processing ZIP files from untrusted sources and implement input validation as a temporary measure.
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