🛡️ Sentinel: [MEDIUM] Fix Unhandled OverflowError when parsing timeout

[ManupaKDU]

🚨 Severity: MEDIUM

💡 Vulnerability: Unhandled OverflowError during timeout parsing. The application converted the timeout parameter to an integer using int(). While it handled ValueError and TypeError, passing float('inf') or float('nan') (e.g. from a deserialized JSON payload like {"timeout": Infinity}) would cause an unhandled OverflowError (for inf) or unhandled behavior, which could bubble up and crash worker threads in the ThreadPoolExecutor.

🎯 Impact: Potential Denial of Service (DoS). A malicious user supplying Infinity as a timeout parameter could crash worker threads, reducing the pool's capacity or entirely halting network scans.

🔧 Fix:

• Updated the try...except block in is_reachable to catch OverflowError alongside ValueError and TypeError.
• Added unit tests in test_testping1.py specifically for timeout=float('inf') and timeout=float('nan').
• Recorded the vulnerability and learning in .jules/sentinel.md.

✅ Verification:

• Ran the test suite python3 -m unittest test_testping1.py, ensuring the new test cases pass and the unhandled OverflowError no longer occurs.

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PR created automatically by Jules for task 11822385467233456138 started by @ManupaKDU

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