🛡️ Sentinel: [security improvement] Add input length limit to prevent DoS#17
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… resource exhaustion (DoS) Added input string length validation in `is_reachable` function to mitigate potential resource exhaustion (DoS). The `ipaddress` module can experience significant CPU spikes parsing excessively large string inputs. By rejecting abnormally long strings upfront, we ensure smooth application performance. Also added the corresponding unit test: `test_is_reachable_ip_too_long` Co-authored-by: ManupaKDU <95234271+ManupaKDU@users.noreply.github.com>
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manupawickramasinghe
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🚨 Severity: MEDIUM
💡 Vulnerability: Resource Exhaustion / Denial of Service (DoS) due to unconstrained string length parsing by the
ipaddressmodule. Extremely long strings can cause significant CPU usage and block the application.🎯 Impact: An attacker could craft abnormally large input strings, exhausting CPU resources and slowing down or crashing the network scanner application.
🔧 Fix: Introduced an input string length limit
len(ip) > 100at the beginning of theis_reachablefunction. It quickly rejects large inputs and logs an error without invoking the heavyipaddressparsing logic.✅ Verification: Verified by running the unit test suite (
python3 -m unittest test_testping1.py). Addedtest_is_reachable_ip_too_longto confirm the correct error handling and rejection behavior. All tests passed.PR created automatically by Jules for task 9371821299663262838 started by @ManupaKDU