Take note of the value of the Current Configuration Register. Type boot. Now the ASA is going to boot the OS, but it will load the default config instead of the startup config.
Then copy the startup config into the running config. Get into global configuration mode and make the changes that you want, e. You have total access now, so you can change anything that you want. When you have finished making all the changes to the config, reset the Configuration Register back to its original value and save the config.
The Configuration Register value is a hex value that specifies various boot parameters for the ASA, such as which boot image to use, whether or not to boot the startup config, or whether to perform the ROMMON countdown. Because the questions only serve as a human-friendly way to formulate the value of the Configuration Register. However, if you just type confreg , it will display the current value of the Configuration Register.
This is important if you need to find out the existing value of the Configuration Register. You can also set the value of the Configuration Register while you are in the global configuration mode with the config-register command. Config-register command in the Cisco ASA 8. The cracked password is show in the text box as "cisco". The password shows up in the password field now. From what I can tell in the docs this is a "type 6" password and this seems to be related to encrypting a pre-shared key.
I did some googling of the exact password line since you said its the default password, this article suggests running more system:running-config which will show you the preshared key Reversing the preshared key. From the Cisco forums :. Type-6 passwords are encrypted using AES cipher and user-defined master key. These passwords are much better protected and the additional difficulty in their decryption is given by the fact that also the master key is defined by the user and is never displayed in the configuration.
Without knowledge of this master key, Type-6 keys are unusable. The disadvantage is that when backing up a configuration or migrating it to another device, the master key is not dumped and has to be configured again manually.
I guess that you are trying to access asa via cli. I have not come across any tool especially free tool that can help break MD5 hash. I'd love to know if you come across one. It looks a bit odd in Cain as it cracks instantly but if you google the hash value then the first result is this which tells us that that's the hash for a blank password Sign up to join this community.
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Active 3 years, 8 months ago. Viewed 93k times. Extra Credit: There are also the following lines with multiple usernames in it which i assume are the same format as above. See below: Hope someone can help, Thanks! Improve this question.
Add a comment. Active Oldest Votes. You can repeat the process for blank If you've used oclHashcat-plus before, the following command worked perfectly to crack it on windows for me. Improve this answer. Step 5 Record your current configuration register value, so you can restore it later. Step 7 Accept the default values for all settings, except for the "disable system configuration? Step 8 Reload the security appliance by entering the following command:. The security appliance loads a default configuration instead of the startup configuration.
Step 11 Load the startup configuration by entering the following command:. Step 12 Enter global configuration mode by entering the following command:. Step 13 Change the passwords in the configuration by entering the following commands, as necessary:. Step 14 Change the configuration register to load the startup configuration at the next reload by entering the following command:.
Where value is the configuration register value you noted in Step 5 and 0x1 is the default configuration register. For more information about the configuration register, see the Cisco Security Appliance Command Reference. Step 15 Save the new passwords to the startup configuration by entering the following command:.
Further modified instructions for the vulcan minded:. To recover passwords, perform the following steps:. Step 2 Power off the security appliance, and then power it on. Current Configuration Register: 0x Configuration Summary:. Do you wish to change this configuration? Step 5 Record your current configuration register value the number that is similar to 0x in the example above , so you can restore it later. Step 6 Enter Y to change the configuration and press Y. The security appliance prompts you for new values.
Step 7 Accept the default values for all settings which is N for all settings by the way, except for the "disable system configuration? Step 10 When prompted for the password, press Return. The password is blank. Step 13 Change the passwords in the configuration by entering the following commands, as necessary.
Note: the second word "password" below is where you enter your actual password since the password "password" is not a password at all. Step 16 You will need to repeat steps 4 through 8, except this time at step seven press N for the "disable system configuration?
I was thinking that I could reset the password on the standby ASA and when it returned to service, its configuration would be newer so it would push the new passwords over to the active ASA. Is this correct? That appears to have worked, except I received a message when I copied the startup-config to the running-config saying "Enter the certificate in hexadecimal representation". Not a big deal as this ASA hasn't been used in months. Really very appreciating work by you.
This guide is missing something around step 6 or 7 where when asked whether to "disable system configuration", you are supposed to answer yes. That is the only way to bypass the existing password and overwrite it with a new one. I have firewall , by mistake I have disable password recovery option also I have forgot username and password how to reset the firewall or how to load new ISO file. Somehow it helped me to reset the password on x. Will I be able to reset to factory default from privilege exec?
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