Lab 256 — UptimeRadar — SSRF via URL Health Check

hackadvisor

Task: UptimeRadar monitoring platform with URL health check feature, no SSRF protection on monitor URLs. Solution: Created monitor pointing to localhost:3001 internal metadata service, extracted cloud service account access_token containing the flag.

ssrf nodejs nginx express decoy_flag internal_service_discovery metadata_service health_check cloud_credentials monitor honeypot_flag_detection

internal_service_discoveryhoneypot_flag_detectionssrf_via_url_parametercloud_metadata_credential_theftmonitor_creation_ssrf

$ ls tags/ techniques/

ssrf nodejs nginx express decoy_flag internal_service_discovery metadata_service health_check cloud_credentials monitor honeypot_flag_detection

internal_service_discoveryhoneypot_flag_detectionssrf_via_url_parametercloud_metadata_credential_theftmonitor_creation_ssrf

Analysis

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

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