🛡️ Sentinel: [MEDIUM] Fix Boolean Type Confusion (CWE-843)

[ManupaKDU]

🚨 Severity: MEDIUM

💡 Vulnerability: Python's bool type inherently subclasses int. When passed to standard library modules like ipaddress which internally use isinstance(var, int), True and False successfully evaluate to integers 1 and 0 respectively. This leads to unexpected type confusion vulnerabilities, bypassing numeric boundary restrictions set earlier in logic flows.

🎯 Impact: Potential logic bypasses (where boolean flags accidentally act as numeric durations for process limits) and implicit network state changes (e.g., 0.0.0.0 being processed directly as an IP). Though currently blocked downstream by defense-in-depth SSRF constraints, relying on late-stage validators for early-stage Type Confusion bypasses is a significant risk.

🔧 Fix: Added explicit type(var) is bool rejections for arbitrary polymorphic inputs prior to them being routed to int() casting or ipaddress.ip_address evaluation.

✅ Verification: Unit tests test_is_reachable_type_confusion_bool asserting that True is correctly blocked and logged as an invalid boolean prior to hitting subprocess/ipaddress calls. All unit tests successfully pass locally (python -m unittest test_testping1.py).

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PR created automatically by Jules for task 1867502310169586486 started by @ManupaKDU

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