webmedium

AquaCrypt

undutmaning

Task: Flask file sharing app with RSA signature verification, obfuscated verify function, 128-bit weak key. Solution: robots.txt enumeration, source code leak via /admin, deobfuscate verify function, factor small RSA modulus, forge PKCS#1 v1.5 signature.

$ ls tags/ techniques/

flask robots_txt obfuscation rsa source_code_leak weak_key pkcs1_v1_5 signature_verification

source_code_leakrobots_txt_enumerationpython_deobfuscationrsa_small_key_factorizationpkcs1_signature_forgery

Analysis

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

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