Critical SSRF Vulnerability in Python 2.7: USN-7280-3 Update Required
Summary
USN-7280-3: python2.7 regression. Affects python2.7 versions < 2.7.6-8ubuntu0.6+esm28. Fixed in 2.7.6-8ubuntu0.6+esm28. How to fix ↓
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Background
Python 2.7 is a widely used programming language known for its simplicity and versatility in various applications, from web development to data analysis. The version 2.7.6-8ubuntu0.6+esm28, specifically in Ubuntu 14.04 LTS, has been identified with a critical vulnerability that affects its ability to handle domain names, potentially leading to serious security risks.
Vulnerability Detail
The vulnerability arises from Python's improper handling of domain names containing square brackets, which can be exploited by remote attackers to execute Server-Side Request Forgery (SSRF) attacks. This flaw can allow attackers to send unauthorized requests from the server, potentially accessing sensitive internal resources and leading to data breaches or further exploitation.
How To Fix
Minimum fixed version
2.7.6-8ubuntu0.6+esm28
This is the first release that contains the fix.
sudo apt-get install --only-upgrade python2.7Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, consider restricting access to the affected services or implementing firewall rules to block unauthorized requests until the package can be updated.
Conclusion
The identified vulnerability in Python 2.7 poses significant security risks that can be mitigated through timely updates. Users are strongly encouraged to apply the necessary patches to safeguard their applications against potential exploitation.
See every vulnerability recorded for python2.7 →
FAQ
The vulnerability allows for Server-Side Request Forgery (SSRF) attacks due to improper parsing of domain names with square brackets.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Exploitation of this vulnerability can lead to unauthorized access to internal resources, data breaches, and further attacks on the system.
Yes, updating to the patched version of Python 2.7 (2.7.6-8ubuntu0.6+esm28) resolves the vulnerability.
If immediate updates are not possible, implement firewall rules to restrict access and monitor for any suspicious activity.
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