Critical Vulnerability in Python2.7: CVE-2021-3177 Reinstated in Ubuntu 14.04 ESM
Summary
USN-4754-5: python2.7 vulnerability. Affects python2.7 versions < 2.7.6-8ubuntu0.6+esm10. Fixed in 2.7.6-8ubuntu0.6+esm10. How to fix ↓
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Background
Python2.7 is a widely used programming language known for its simplicity and readability. It is utilized in various applications, from web development to data analysis. The package in question, python2.7, is the implementation of the Python programming language for Ubuntu 14.04 LTS. This version has been under Extended Security Maintenance (ESM), which provides critical security updates for legacy systems. The vulnerability in this package can lead to severe security risks if not addressed promptly.
Vulnerability Detail
The vulnerability, identified as CVE-2021-3177, was discovered due to improper handling of certain inputs by Python. This flaw could allow an attacker to execute arbitrary code or cause a denial of service, posing significant risks to systems utilizing this version of Python. The issue was initially fixed in a prior update, but a regression led to the removal of this fix, necessitating a reinstatement in the latest update.
How To Fix
Minimum fixed version
2.7.6-8ubuntu0.6+esm10
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, users can limit the exposure of their systems by restricting access to the Python interpreter or by using alternative programming environments until the update is applied.
Conclusion
The reinstatement of the security fix for CVE-2021-3177 in Python2.7 is crucial for maintaining the integrity and security of systems running Ubuntu 14.04 ESM. Users are strongly encouraged to update their packages promptly to mitigate potential risks associated with this vulnerability.
See every vulnerability recorded for python2.7 →
FAQ
CVE-2021-3177 is a security vulnerability in Python2.7 that allows for arbitrary code execution or denial of service due to improper input handling.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Failing to address this vulnerability can lead to unauthorized access, data breaches, and potential system compromise.
Yes, Vulert can monitor and alert you in real-time for open-source vulnerabilities using a manifest file like package-lock.json.
If an immediate update is not possible, consider implementing access controls to limit exposure and monitor for any suspicious activity.
References
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