Key Security Risk: Python Extraction Flaw Exposes Systems to Data Loss
A critical security vulnerability in Python’s tar archive extraction feature has been discovered, affecting multiple Ubuntu LTS and non-LTS releases, including:
Ubuntu 25.04
Ubuntu 24.10
Ubuntu 24.04 LTS
This flaw (CVE-2024-12718, CVE-2025-4138, CVE-2025-4330, CVE-2025-4435, CVE-2025-4517) allows attackers to overwrite arbitrary files on vulnerable systems, leading to potential data corruption, privilege escalation, or system compromise.
Affected Software Packages
Python 3.13 (Ubuntu 25.04, 24.10)
Python 3.12 (Ubuntu 24.10, 24.04 LTS)
How the Python File Overwrite Exploit Works
The vulnerability stems from improper handling of tar archive extraction with filtering options, enabling malicious actors to:
✔ Modify critical system files
✔ Bypass security restrictions
✔ Cause irreversible data loss
Real-World Impact:
Attackers could replace configuration files, leading to service disruptions.
Malicious archives could overwrite user data, resulting in financial or operational damage.
Patch Instructions: Secure Your Ubuntu System Now
To mitigate this risk, immediately update your Python packages to the following patched versions:
| Ubuntu Version | Affected Package | Fixed Version |
|---|---|---|
| Ubuntu 25.04 | python3.13 | 3.13.3-1ubuntu0.2 |
| Ubuntu 24.10 | python3.12 | 3.12.7-1ubuntu2.2 |
| Ubuntu 24.10 | python3.13 | 3.13.0-1ubuntu0.3 |
| Ubuntu 24.04 LTS | python3.12 | 3.12.3-1ubuntu0.7 |
Update Command:
sudo apt update && sudo apt upgrade -y
Why This Vulnerability Demands Immediate Attention
✅ High Severity (CVSS 8.1+) – Exploitable remotely in some configurations.
✅ Widespread Impact – Affects developers, sysadmins, and enterprise environments.
✅ Data Integrity at Risk – Unauthorized file modifications can lead to compliance violations.
Additional Security Recommendations
Audit extraction logs for suspicious activity.
Restrict tar file handling in untrusted environments.
Monitor file integrity with tools like AIDE or Tripwire.
Official References & CVE Details
🔗 Ubuntu Security Notice (USN-7583-1): https://ubuntu.com/security/notices/USN-7583-1
🔗 CVE Database: CVE-2024-12718, CVE-2025-4138
FAQ: Ubuntu Python Security Vulnerability
Q1: Can this exploit be triggered remotely?
A: Yes, if an attacker can deliver a malicious tar file (e.g., via phishing or compromised downloads).
Q2: Are Docker containers affected?
A: Yes, if running vulnerable Python versions—update base images immediately.
Q3: Is there a temporary workaround?
A: Disable tar extraction in untrusted workflows until patched.
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