Recent round of SQL injection attacks

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Dave Anderson - 02 Jul 2008 20:24 GMT

We log hundreds of SQL injection attempts per day -- the type with
CAST(0x44004500... AS VARCHAR(4000)). It amuses me that the last thing the
attack does is DEALLOCATE its cursor. My SQL Server DBA tells me this makes
no difference. So...

Are these hackers cargo cultists? Or am I missing something?

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Dave Anderson

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Bob Barrows [MVP] - 02 Jul 2008 20:35 GMT

> We log hundreds of SQL injection attempts per day -- the type with
> CAST(0x44004500... AS VARCHAR(4000)). It amuses me that the last
> thing the attack does is DEALLOCATE its cursor. My SQL Server DBA
> tells me this makes no difference. So...
>
> Are these hackers cargo cultists? Or am I missing something?

I think it used to be necessary, at least in SQL 6.5 ... I remember
reading about all sorts of dire consequences if a cursor was not
explicitly closed and deallocated.

BOL has said since SQL7:
A cursor variable does not have to be explicitly deallocated. The
variable is implicitly deallocated when it goes out of scope.

So I guess the cargo has landed on the hackers' island...

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Webmaster Forum / ASP / General ASP Topics / July 2008

Recent round of SQL injection attacks