cryptoPromedium

Абсолютная безопасность (Absolute Security)

hackerlab

Task: XOR encryption service with assertion that rejects enc[i] == flag[i]. Solution: Statistical attack - collect ~2700 samples and find the missing byte value at each position (the one that never appears is the flag byte).

xor information_leak oracle statistical_attack filtered_output assertion_bypass byte_exclusion random_oracle sampling_attack

Statistical analysis of filtered XOR outputsMissing byte detection through samplingInformation leak via output filteringByte-by-byte plaintext recovery

$ ls tags/ techniques/

xor information_leak oracle statistical_attack filtered_output assertion_bypass byte_exclusion random_oracle sampling_attack

Statistical analysis of filtered XOR outputsMissing byte detection through samplingInformation leak via output filteringByte-by-byte plaintext recovery

Analysis

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

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