I was curious if it's possible to protect against an SQL injection attack by removing all spaces from an String input?
I have been reading up on SQL Injection at OWASP, but they don't mention anything about removing spaces, so I was curious why it would, or would not work?
I was looking at this question, which asks about
trim, and the top answer says this:
No, adding a trim will not prevent sql injection.
trimonly removes space on the outside of your string.
Select * from aTable where name like '%'+@SearchString+'%'
If you @SearchString held something like
'' update aTable set someColumn='JackedUpValue' where someColumn like '
Then when you put it all together and execute it dynamically you would get
Select * from aTable where name like '%' update aTable set someColumn='JackedUpValue' where someColumn like '%'
However if you took that search string
update aTable set someColumn='JackedUpValue' where someColumn like
and performed the operation shown in this question, wouldn't you get
which should not execute, right?
I'm curious if there is any form of SQL injection that could defeat this? Are there one word dangerous commands? If this can be defeated, would removing spaces at least help a bit with defense?
Note: I'm asking this question purely out of curiosity, not as way to circumvent using the "proper" methods of SQL Injection Prevention.