hi David.

"I don't know if there are other quickest methods, else it could be
included in sqlmap."

actually we have a mechanisms to dealing with these kind of problems.
it's called tampering and you can use it with --tamper switch and
scripts located in ./tamper directory. in your case best solution
would be to try to use script "tamper/between.py". it will replace all
occurrences of character > with equivalent 'between' form, e.g. a>10
---> a not between 0 and 10.

so, try to use --tamper="./tamper/between.py" do deal with your case.

KR

On Wed, Apr 20, 2011 at 6:33 PM, David Alvarez
<david.alvare...@gmail.com> wrote:
> Hello,
> I found a web application that uses PostgreSQL 8.1.22 and filter '>' and '<'
> characters. This app is vulnerable to a Blind Sql injection, so sqlmap try
> to extract data doing the boolean-base technique. However, due to <,>
> characters are filtered sqlmap is not able to extract data. The method that
> I used to extract was very slow: changing boolean condition from A > B to A
> = B.
> So, this is a possible kind of method to extract data when '<>' characters
> are filtered. I don't know if there are other quickest methods, else it
> could be included in sqlmap.
> Kind regards,
> David Alvarez
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-- 
Miroslav Stampar

E-mail: miroslav.stampar (at) gmail.com
PGP Key ID: 0xB5397B1B

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Benefiting from Server Virtualization: Beyond Initial Workload 
Consolidation -- Increasing the use of server virtualization is a top
priority.Virtualization can reduce costs, simplify management, and improve 
application availability and disaster protection. Learn more about boosting 
the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev
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