Kobold

hackthebox

Task: HackTheBox machine with MCP Inspector, PrivateBin, and Arcane Docker Management. Solution: SSRF/RCE via MCP protocol, PHP injection into PrivateBin data files to leak config, password reuse to Arcane API, Docker container mount for root flag.

ssrf docker jwt linux nginx password_reuse ubuntu vhost_enumeration hackthebox full_pwn container_escape mcp_protocol mcp_inspector privatebin php_code_injection config_leak arcane docker_compose

vhost_fuzzing_subdomain_discoveryssrf_via_mcp_connect_endpointrce_via_mcp_stdio_transportphp_injection_into_privatebin_data_filesconfig_leak_via_shared_docker_volumepassword_reuse_across_servicesdocker_container_host_mount_escalationarcane_api_abuse_for_container_creation

$ ls tags/ techniques/

ssrf docker jwt linux nginx password_reuse ubuntu vhost_enumeration hackthebox full_pwn container_escape mcp_protocol mcp_inspector privatebin php_code_injection config_leak arcane docker_compose

Analysis

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

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