SQL NINJA CTF SOLUTIONS FOR BASIC INJECTION CATEGORY

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This CTF base on sql injection. If we want to exploit sql injection we have to follow a rule. that is,
we must balance the query. If we successfully balanced the query we can easily exploit the sql
injection.

Challenge 1

When i put a single quote at the end of the url i will get below output.

While we obtain the output, we can say this output is one of the sql error. The actual error is,
this one has extra single quote (''1'''). So we have to balance it. If we want to balance
this we must add OR’1’=’1 this at the end part of the url. After attaching
the query will be modified like this a’or’1’=’1’. The last quote will be added by system.

Challenge 2

In this challenge if we put single quote we will get below error

Our input directly goes within double quote so, this query does not need to put any special
character for query balancing purposes, hence we can directly insert our malicious(+or+1=1) code
at the end of the url.

 Challenge 3

This level does not give any sql related output while we use single quote at the end.so we have
to move on double quote. If we use double quote at the end of the url we will get as usual sql error.
Then we can balance the query by using this “-- -” malicious code. Now we can inject the harmful
code within the url.

Challenge 4

In this level shows close bracket symbol with in the error message so we have to fill that bracket
as well.
So i use this code “)-- -” to balance the query.

Comments

  1. UnknownSeptember 27, 2018 at 5:52 AM

    Could you elaborate on what you meant by "balancing queries"?

    ReplyDelete
    Replies
    1. AnjaiOctober 23, 2019 at 2:39 AM

      1st of all you have to produce a SQL error to identity the vulnerability. after found the vulnerability you should fix the SQL error by your self. it is called as query balancing.

      Delete
  2. KidslearnwithfunMarch 27, 2019 at 4:01 AM

    Thank you share with us ninja information

    ReplyDelete
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