cryptoProhard

Faulty Mayo

srdnlen

Task: MAYO-2 post-quantum signature scheme with single-nibble binary patching allowed in signing function. Solution: Fault attack via x86-64 ModRM byte manipulation to leak secret Oil matrix rows, then forge valid signatures.

x86_64 signature_forgery aes_ctr mayo post_quantum fault_attack gf16 duffs_device

nibble_fault_injectionsecret_key_recovery_via_linear_equationsmayo2_signature_forgingmodrm_byte_patchinggf16_linear_algebra

$ ls tags/ techniques/

x86_64 signature_forgery aes_ctr mayo post_quantum fault_attack gf16 duffs_device

nibble_fault_injectionsecret_key_recovery_via_linear_equationsmayo2_signature_forgingmodrm_byte_patchinggf16_linear_algebra

Analysis

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

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