If Type 7 passwords are so weak, how do I use Type 5 passwords? When creating accounts use the secret command like so;

Displays in the config as;

username petelong secret 5 $1$VkQd$Vma3sR7B1LL.v5lgy1NYc/

Decrypting Type 5 Cisco Passwords

Decrypting a Type 5 Cisco password is an entirely different ball game, they are considered ‘secure’ because they are ‘salted’ (have some random text added to the password to create an MD5 hash) however that random salt is shown in the config.

Well armed with the salt and the hash, we can use exactly the same method that Cisco use to create the encrypted password, by brute force attacking the password, this might sound like a difficult piece of hacking ninja skill, but we simply use openssl on a Linux box (here I’m using CentOS 6.5), all you need is a wordlist.txt file (search the Internet).

Feed openssl the salt, and a piece of the hash (see the example above), and it will run through, (grep) the wordlist until it finds a match, where it spits out the decrypted password an the original hash like so;

The decrypted password is SECRETPASSWORD

Privilege 15 Password 7 Crack Key

Note: The limitation here is the password has to be in the wordlist.txt file,but if you are adept at searching the Internet there are some impressive wordlist files out there, just make sure you use one that has full line breaks. Also remember, the longer the wordlist, the longer it takes.

Related Articles, References, Credits, or External Links

Privilege 15 Password 7 Crack 10

NA