webmedium

Curl

spbctf

Task: Web app fetches user-provided URLs via PHP curl with protocol validation. Solution: Bypassed HTTP-only check using open redirect to file:// protocol via CURLOPT_FOLLOWLOCATION misconfiguration.

$ ls tags/ techniques/

ssrf file_read php apache curl redirect_bypass protocol_bypass open_redirect curlopt_followlocation curlproto_all

local_file_readssrf_via_redirectprotocol_bypass_via_open_redirectcurl_misconfiguration_exploit

Analysis

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

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

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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