cryptomedium

Mystery Box

hackthebox

> "They released this new mystery box thing to modify messages or something, but i'm sure my signing server will be fine."

$ ls tags/ techniques/

rsa signature_forgery blinding_attack multiplicative_homomorphism modulus_recovery textbook_rsa chosen_message_attack

rsa_blinding_attackgcd_modulus_recoverymultiplicative_homomorphism_forgery

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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