CVE-2007-4559 — AI Deep Analysis Summary

🚨 **Essence**: Python's `tarfile` module (extract/extractall) fails to sanitize paths. 📉 **Consequences**: Attackers use `..` sequences in TAR filenames to escape the target directory.…

🛡️ **CWE**: Path Traversal (Implicitly CWE-22). 🔍 **Flaw**: Lack of validation on file paths within the TAR archive before extraction.…

📦 **Affected**: Python versions prior to **3.11.4**. 🧩 **Component**: The standard `tarfile` module. 🌐 **Scope**: Any application using Python's default `extract` or `extractall` functions on untrusted TAR files.

👑 **Privileges**: Execution context of the Python process. 📂 **Data**: Read/Write access to the filesystem.…

⚡ **Threshold**: LOW. 🔓 **Auth**: Often requires no authentication if the service accepts file uploads. ⚙️ **Config**: Triggered simply by uploading a malicious `.tar` file to any service that extracts it.

🔓 **Public Exp**: YES. 📜 **Evidence**: Multiple PoCs exist (e.g., Polemarch exploit, Creosote scanner). 🌍 **Wild Exploitation**: High.…

🔍 **Self-Check**: Use tools like **Creosote** to scan Python code for vulnerable `tarfile` usage. 🐍 **Code Review**: Look for `extractall()` without path validation.…

✅ **Fixed**: YES. 📅 **Version**: Python **3.11.4+** includes an extraction filter. 🛡️ **Mitigation**: The new filter prevents path traversal by validating paths against the extraction directory.…

🚧 **Workaround**: If stuck on old Python: 1. Manually validate paths using `os.path.realpath()`. 2. Implement a custom extraction filter. 3. Avoid `extractall()` on untrusted data. 4. Use sandboxed environments.

🔥 **Priority**: CRITICAL. 📉 **Risk**: High impact (RCE/File Overwrite). 📅 **Urgency**: Immediate action required for legacy systems. Even though patched in 2024, many legacy systems still run vulnerable Python versions.