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webProeasy

Login Problems

hackerlab

Task: a Flask/Werkzeug login page hides its authentication logic in a JSFuck-obfuscated frontend script. Solution: deobfuscate /static/hell.js, recover the hardcoded admin credentials, and log in as admin with the leaked password.

flask javascript authentication_bypass werkzeug jsfuck credential_disclosure client_side_auth

javascript_deobfuscationclient_side_secret_extractionclient_side_auth_bypass

$ ls tags/ techniques/

flask javascript authentication_bypass werkzeug jsfuck credential_disclosure client_side_auth

javascript_deobfuscationclient_side_secret_extractionclient_side_auth_bypass

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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