phpcmsV9某sql注入漏洞别人说最危险的地方最安全，我说最安全的地方最危险。。。
相信你们也没有想到这个最常见，常常会在各种教程出现的地方会存在SQL注射。。。
需 GPC OFF
首先，我们看登陆的地方。。最常见了吧。。。
http://127.0.0.1/index.php?m=member&c=index&a=login
默认安装情况下，会使有 V9自带的用户中心。
phpcms\modules\member\index.php
public function login() {
$this->_session_start();
//获取用户siteid
$siteid = isset($_REQUEST['siteid']) && trim($_REQUEST['siteid']) ? intval($_REQUEST['siteid']) : 1;
//定义站点id常量
if (!defined('SITEID')) {
define('SITEID', $siteid);
}
if(isset($_POST['dosubmit'])) {
if(empty($_SESSION['connectid'])) {
//判断验证码
$code = isset($_POST['code']) && trim($_POST['code']) ? trim($_POST['code']) : showmessage(L('input_code'), HTTP_REFERER);
if ($_SESSION['code'] != strtolower($code)) {
showmessage(L('code_error'), HTTP_REFERER);
}
}
$username = isset($_POST['username']) && trim($_POST['username']) ? trim($_POST['username']) : showmessage(L('username_empty'), HTTP_REFERER);
$password = isset($_POST['password']) && trim($_POST['password']) ? trim($_POST['password']) : showmessage(L('password_empty'), HTTP_REFERER);
$cookietime = intval($_POST['cookietime']);
$synloginstr = ''; //同步登陆js代码
if(pc_base::load_config('system', 'phpsso')) {
$this->_init_phpsso();
$status = $this->client->ps_member_login($username, $password);
$memberinfo = unserialize($status);
可以看到用户名密码交给了
$this->client->ps_member_login($username, $password);
我们跟进。
phpcms\modules\member\classes\client.class.php
$return = $this->_ps_send('login', array('username'=>$username, 'password'=>$password));
private function _ps_send($action, $data = null) {
return $this->_ps_post($this->ps_api_url."/index.php?m=phpsso&c=index&a=".$action, 500000, $this->auth_data($data));
}
public function auth_data($data) {
$s = $sep = '';
foreach($data as $k => $v) {
if(is_array($v)) {
$s2 = $sep2 = '';
foreach($v as $k2 => $v2) {
$s2 .= "$sep2{$k}[$k2]=".$this->_ps_stripslashes($v2);
$sep2 = '&';
}
$s .= $sep.$s2;
} else {
$s .= "$sep$k=".$this->_ps_stripslashes($v);
}
$sep = '&';
}
$auth_s = 'v='.$this->ps_vsersion.'&appid='.APPID.'&data='.urlencode($this->sys_auth($s));
return $auth_s;
}
_ps_stripslashes
private function _ps_stripslashes($string) {
!defined('MAGIC_QUOTES_GPC') && define('MAGIC_QUOTES_GPC', get_magic_quotes_gpc());
if(MAGIC_QUOTES_GPC) {
return stripslashes($string);
} else {
return $string;
}
}
还原了 GPC，传参数给 API。
我们再看看 API 方的处理方式
phpsso_server\phpcms\modules\phpsso\classes\phpsso.class.php
if(isset($_POST['data'])) {
parse_str(sys_auth($_POST['data'], 'DECODE', $this->applist[$this->appid]['authkey']), $this->data);
if(!is_array($this->data)) {
exit('0');
}
} else {
exit('0');
}
parse_str 函数默认是根据 GPC情况过滤。
再到
phpsso_server\phpcms\modules\phpsso\index.php
public function login() {
$this->password = isset($this->data['password']) ? $this->data['password'] : '';
$this->email = isset($this->data['email']) ? $this->data['email'] : '';
if($this->email) {
$userinfo = $this->db->get_one(array('email'=>$this->email));
} else {
$userinfo = $this->db->get_one(array('username'=>$this->username));
}
phpsso_server\phpcms\libs\classes\model.class.php
final public function get_one($where = '', $data = '*', $order = '', $group = '') {
if (is_array($where)) $where = $this->sqls($where);
return $this->db->get_one($data, $this->table_name, $where, $order, $group);
}
/**
* 将数组转换为SQL语句
* @param array $where 要生成的数组
* @param string $font 连接串。
*/
final public function sqls($where, $font = ' AND ') {
if (is_array($where)) {
$sql = '';
foreach ($where as $key=>$val) {
$sql .= $sql ? " $font `$key` = '$val' " : " `$key` = '$val'";
}
return $sql;
} else {
return $where;
}
}