webmedium

Flagbox 2

hackerlab

Task: PHP web challenge with str_rot13 obfuscated code and IP-based secret generation. Solution: Deobfuscate str_rot13 strings, reverse engineer xFunc900() algorithm that calculates secret word from IP digit sums, submit calculated secret to get flag.

$ ls tags/ techniques/

php source_code_analysis cookie_manipulation obfuscation str_rot13 algorithm_reverse ip_based_auth digit_sum sequel_challenge

PHP str_rot13 deobfuscationAlgorithm reverse engineeringCookie-based IP manipulationDigit sum calculation

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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