🛡️Security Fix Verification

Summary

This document verifies that all action items from GitHub issue #61 regarding critical subprocess shell=True vulnerabilities have been completed.

Issue #61 Action Items Status

✅ Fix encrypt_config.py:47 to use shell=False

Status: COMPLETED

• The current implementation in src/proxmox_mcp/utils/encrypt_config.py uses secure ANSI escape sequences

• No subprocess calls with shell=True exist in the codebase

• Terminal clearing is implemented usingprint("\033[2J\033[H", end="", flush=True)

✅ Update platform-specific command handling

Status: COMPLETED

• Windows: Uses ANSI escape sequences with ctypes fallback

• Linux/macOS: Uses ANSI escape sequences directly

• No platform-specific subprocess calls with shell=True

✅ Fix test assertions in test_encrypt_config.py

Status: COMPLETED

• Test comments confirm "Our implementation no longer uses subprocess"

• Tests verify ANSI escape sequence usage instead of subprocess calls

• All terminal clearing tests updated for secure implementation

✅ Verify no other shell=True instances exist

Status: VERIFIED

• Comprehensive search of src/ directory found no shell=True usage

• Comprehensive search of tests/ directory found no shell=True usage

• Only references are in documentation and pre-commit configuration

✅ Add pre-commit hook to prevent future shell=True usage

Status: COMPLETED

• Custom hook exists in .pre-commit-config.yaml

• Hook command: grep -r "shell=True" src/ --include="*.py"

• Prevents future introduction of shell=True vulnerabilities

Security Implementation Details

Current Secure Implementation

The clear_terminal_if_requested() function now uses:

• ANSI escape sequences: \033[2J\033[H

• Cross-platform compatibility without subprocess

• Proper error handling and fallbacks

Security Benefits

• Eliminates command injection vulnerabilities

• No shell interpretation of user input

• Maintains functionality across platforms

• Follows security best practices

Verification Commands Run

• find_filecontent searches for shell=True in src/ and tests/

• Pre-commit hook testing

• Code formatting and linting verification

Conclusion

All action items from issue #61 have been completed. The security vulnerability has been resolved through a secure implementation that eliminates subprocess shell=True usage while maintaining the required terminal clearing functionality.