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Re: [Full-disclosure] Deep Blind SQL Injection Whitepaper
From: Haroon Meer <haroon_at_nospam>Date: Thu Aug 28 2008 - 16:52:16 GMT
To: nummish <nummish@0x90.org>
Hi nummish..
- On 28/08/2008, [at 11:36:23 -0500] nummish [nummish@0x90.org] seemed to say:
>Sorry to resurrect a 9 day old thread here...
>It's an interesting concept, but like all timing based attacks, won't
>the digits be more susceptible to noise due to possible network
>latency? Even with two queries, there is still a large volume of
>requests getting made, and one little bump can invalidate the
>information you are pulling out.
We bumped into the same problem when we took the ordinal(char) approach. A small hiccup on the line easily makes an A an E
The bit by bit approach we use
(http://www.sensepost.com/research/squeeza/) makes this problem much
easier to deal with.. i.e. we once had an insanely bad connection to a
box and upp'ed the delay per bit to 14 seconds.. i.e, 14 secs == 1, 0 ==
0. The analyst aged a few years while waiting for the output he needed,
but you can be fairly confident of the integrity of the data.
(its why squeeza happlily does a transfer of binary files from the server using just timing (and patience))
/mh
Ps.. checkout the paper on the same page for snippets of the sql we are using.. -- Haroon Meer, SensePost Information Security | http://www.sensepost.com/blog/ PGP: http://www.sensepost.com/pgp/haroon.txt | Tel: +27 83786 6637
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