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  2. MIDRANGE-L
  3. February 2007

RE: sql injection related to iSeries

-----Original Message-----

DB2/400 is as susceptible to sql injection as the database next door.


More accurately, it's not DB/2 that's susceptible, rather it is poor SQL
coding techniques.

First, embedded SQL is not subject to any of the trickery that hackers
manage using apostrophes and comments.  As far as I know, host variables
remove all SQL injection exploits.

If you really want to use dynamic SQL, you should consider using prepared
statements with placeholders.  These are just as secure as the embedded SQL
technique above, but a bit more flexible.

Finally, if you absolutely require purely dynamic statements that you build
yourself, you will need to quote your strings.  For the vast majority of
cases, doubling apostrophes is adequate.  What you will need to some degree
depends on your database.

Joe

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