Reset admin password of OpenVAS
Solution 1:
Try this:
openvasmd --user=admin --new-password=new_password
Solution 2:
To change the web login :
openvasmd --create-user NEWUSER
It will automatically generate a password for the new user.
Use this new account to modify the admin password.
To remove the 'junk / false' account just enter
openvasmd --delete-user=NEWUSER
or do so in the WebUI.
Solution 3:
NOTE: This was the solution several years ago and this answer, although accepted, is now outdated. Please look at other answers to find an up to date solution
You can create a new administrative account with :
openvasad -c add_user -u your_new_login_here -r Admin
Then use this account to change the default admin's password.