🛡️ Sentinel: [security improvement] Sanitize subprocess environment variables - #120
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Added `env={}` to the `subprocess.run` call executing `ping`.
This acts as a defense-in-depth measure to prevent potential
Environment Variable Injection attacks (e.g., manipulating `PATH`
or `LD_PRELOAD`) and avoids unnecessarily exposing any sensitive
parent environment variables to the child process.
Co-authored-by: ManupaKDU <95234271+ManupaKDU@users.noreply.github.com>
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🚨 Severity: MEDIUM
💡 Vulnerability: The
is_reachablefunction executed thepingsystem utility viasubprocess.runwithout clearing the environment (usingenv=Noneimplicitly). This allows the child process to inherit the parent process's environment variables.🎯 Impact: This presents a risk of Environment Variable Injection. An attacker who controls the parent environment could manipulate variables like
LD_PRELOADorPATHto alter the utility's behavior or execute arbitrary code. It also unnecessarily exposes any sensitive secrets (like API keys) stored in the parent environment to the unprivileged child process.🔧 Fix: Added
env={}to thesubprocess.runcall, strictly isolating the child process and enforcing the principle of least privilege.✅ Verification: Ran the test suite using
pip install tqdm && python -m unittest test_testping1.py, which confirms the fix (via an updated assertion in the mockedsubprocess.runcall).PR created automatically by Jules for task 1710556655300741897 started by @ManupaKDU