Information Security

Crack Juniper Router Passwords, Juniper Password Hash Details

Recently I needed to find out information about a Juniper router password which is stored as a hash in the router configuration. The tricky part is while the password hash is technically a MD5 hash it is modified to make it unique and make it harder to crack. Luckily there is a way to crack the hash using JTR (John The Ripper) though it will require that you also have the username associated to the password as the username is used as part of the salt for the hash. Below there is first information on how to crack Juniper hashes which are the same as Netscreen hashes followed by more information about the hash itself.