webPromedium

GhostRegister

hackerlab

Task: PHP 8.1 web app with login/registration storing serialized User object in cookie; profile.php deserializes it without validation. Solution: craft cookie with nested Output object in logger field to trigger __wakeup() → file_get_contents('/flag.txt') POP chain.

file_read php deserialization object_injection unserialize pop_chain magic_methods cookie_tampering

php_object_injection_via_cookie_deserializationpop_chain_wakeup_magic_methodarbitrary_file_read_via_output_classcookie_tampering_for_auth_bypass

$ ls tags/ techniques/

file_read php deserialization object_injection unserialize pop_chain magic_methods cookie_tampering

php_object_injection_via_cookie_deserializationpop_chain_wakeup_magic_methodarbitrary_file_read_via_output_classcookie_tampering_for_auth_bypass

Analysis

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$ 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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