Cisco Cracker

May 5, 2016 - I used this command to crack the telnet login. Hydra -P password.lst 10.42.0.87 cisco. This is the password cracking session that resulted in me.

For all actions you will need console cable and direct access to your router! You can load device in rommon and set config-register to 2142, then reload device again. It will load into default configuration and by entering configure memory you will get into nvram-configuration mode where you can change your enable secret. Don't forget after that change your config-register back to 2102. So steps in order: • Restart device • Press Ctrl+Z right after you see first boot messages • In rommon enter: confreg 0x2142 reset • Boot. Device now with default config. Do enable conf memory • Change enable secret • Change config-register back to normal boot (conf-t)# config-register 0x2102 write • End up with reload.

The key difference between enable password. And enable secret. Is that enable password stores the password using a reversible format and enable secret uses a one-way MD5-based hash. Many configurations have enable password as well as enable secret and that makes 'cracking' simple. But even if the machine is using only enable secret if you have a copy of the one-way hashed key then it's usually trivial to 'crack' it due to the poor choice of enable passwords of a typical installation. Many will fall to a simple dictionary-based attack. For this reason it's usually better to have a random enable secret (recorded offline) and use the AAA features to allow RADIUS authentication to login into the machine and againt to enter enable mode.

That RADIUS authentication can require an access token such as YubiKey, (or, as a less secure choice, gateway into corporate authentication systems where good password practices are more easily enforced). Ford ids software lizenz bosch. Cisco do make it easy to zeroise and recover a unit where you no longer have access, and another member has given that procedure in their answer.

In addition to the practical hints of Mark and Georg we should look at some background information: There is no decryption as the passwords are not encrypted but hashed. Although it's also a cryptographic operation, it's not a reversible encryption but a one-way function. All you can do is to take many different passwords, hash them and compare the result to your given hash-value. The used hash-algorithm with type 5 is salted md5 which can be computed lightning fast on modern computers.

Many people choose not to do this or are not even aware of this Windows 7 feature. In fact, there are many chances and ways for you to recover your Windows login password. You only need to remember your Windows password reset disk to gain access to the Password Reset Wizard and create a brand new password. How to break windows password without any software. For starters, Windows 7 already has a built-in feature of resetting your disk which can be used to reset your password. One of the first things you have to do upon setting up your computer is creating a Windows 7 password reset disk.

If you know that the original password is not too complex and long, it should be possible with the given tools. The triviality in computing md5-based hashes (and also that there can be collisions) make md5-hashed passwords a bad thing and nowadays (at least in newer IOS) pbkdf2 or scrypt is often used. These are the password-types 8 and 9.