CSAWCTF_2017: CVV

Category: Misc Points: 100 Description:

Hey fam, you got CVV? I need some CVV! nc misc.chal.csaw.io 8308

Write-up

This challenge involves programming a credit card generator challenge to answer to some stupid questions. I accomplished this in Python.

# ./solve.py 
[+] Opening connection to misc.chal.csaw.io on port 8308: Done
[*] Sending: 5112343637805266
[*] Sending: 371442055014331
[*] Sending: 4123458813001652
[*] Sending: 4123455688586239
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[*] Sending: 1234562685201217
[*] Sending: 1234564032402803
[*] Sending: 1234561401315327
[*] Sending: 1234563637836555
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[*] Sending: 1234567235419011
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[*] Sending: 1234567707445171
[*] Sending: 0
[*] Sending: 0
[*] Sending: 1
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[*] Sending: 0
[*] Sending: 1
[*] Sending: 0
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[*] Sending: 1
[+] flag{ch3ck-exp3rian-dat3-b3for3-us3}
[*] Closed connection to misc.chal.csaw.io port 8308

Therefore, the flag is flag{ch3ck-exp3rian-dat3-b3for3-us3}.

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