Openssl passwd = Command used to hash the password, on Cisco IOS this would be enable secret Let me just take a moment to explain the task we have just performed and what the output means. You should be presented with a one-way transform of the password ‘ cisco’ Open Terminal and ensuring you are in root enter openssl passwd -1 yvQJ cisco and press enter Produce a one-way transform (MD5 hash) using Kali Linux To carry out MD5 cracking we will use John the Ripper to crack a weak hashed password and then we will use a custom dictionary to carry out the second attack. It was such an informative lab, I decided to document it and share it with the SYNACK community. MD5 passwords use something called salted hash, this is a four-character phrase that is generated and combined with the password.Įxtracts of the following demonstration are taken from a CCNA Security lab I have been working on. When weak password strings are used that are protected with MD5 they become susceptible to attacks. I will demonstrate the cracking of MD5 salted passwords using Kali Linux and a password cracking tool, John the Ripper.Ĭisco IOS devices use the MD5 algorithm to hash username passwords created by administrators. In this article, I would like to highlight the importance of using complex passwords when hashed with the MD5 128-bit algorithm.
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