Lab 275 — GatewayPulse — Proxy ACL Bypass via Path Case Normalization

hackadvisor

Task: nginx reverse proxy with case-sensitive location ACL blocking /admin/ endpoints in front of Express.js backend with case-insensitive routing. Solution: Path case normalization bypass — capitalize /Admin/flag to evade nginx ACL while Express still routes it to the admin handler.

case_sensitivity nginx express acl_bypass reverse_proxy path_normalization honeypot_decoy proxy_backend_desync

anti_honeypot_awarenessnginx_case_sensitive_location_bypasspath_case_normalization_bypassproxy_backend_routing_desync

$ ls tags/ techniques/

case_sensitivity nginx express acl_bypass reverse_proxy path_normalization honeypot_decoy proxy_backend_desync

anti_honeypot_awarenessnginx_case_sensitive_location_bypasspath_case_normalization_bypassproxy_backend_routing_desync

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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