Неуязвимый калькулятор (Invulnerable Calculator)

hackerlab

Task: Ruby eval-based calculator with blacklist filtering. Solution: Bypass filters using string concatenation to build method names and alternative .() syntax instead of .call().

sandbox_escape eval_injection blacklist_bypass ruby string_concatenation method_object alternative_call_syntax filter_evasion

Ruby eval injectionBlacklist bypass via string concatenationMethod object manipulationAlternative method call syntax (.() instead of .call)

$ ls tags/ techniques/

sandbox_escape eval_injection blacklist_bypass ruby string_concatenation method_object alternative_call_syntax filter_evasion

Ruby eval injectionBlacklist bypass via string concatenationMethod object manipulationAlternative method call syntax (.() instead of .call)

Analysis

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

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