🛡️ Sentinel: [HIGH] Fix Server-Side Request Forgery for Reserved IPs#23
🛡️ Sentinel: [HIGH] Fix Server-Side Request Forgery for Reserved IPs#23
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The previous logic in `is_reachable` blocked loopback, link-local, multicast, and unspecified addresses but missed explicitly reserved subnets and the broadcast IP (`255.255.255.255`). This PR extends the SSRF protection to block IPs that resolve to `is_reserved`. Also includes tests in `test_testping1.py` and a journal entry in `.jules/sentinel.md`. Co-authored-by: ManupaKDU <95234271+ManupaKDU@users.noreply.github.com>
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🚨 Severity: HIGH
💡 Vulnerability: The
is_reachablefunction validated if an IP was correctly formatted, but did not restrict the semantic destination for broadcast addresses and other reserved subnets. This allowed Server-Side Request Forgery (SSRF) where the scanner could be manipulated into pinging255.255.255.255. Pinging broadcast addresses can lead to amplification attacks or unintended network noise.🎯 Impact: An attacker could trigger unintended network noise, or potentially use the tool in an amplification/reflection attack.
🔧 Fix: Added
ip_obj.is_reservedto the block list intestping1.pyto prevent pinging reserved IPs (such as the broadcast IP). Also appended an entry in.jules/sentinel.mddocumenting this learning.✅ Verification: Ensure the test cases pass and the logic handles
255.255.255.255appropriately. Tests have been modified and confirm this check is evaluated correctly.PR created automatically by Jules for task 2619160518815945850 started by @ManupaKDU