Discuz系统错误，含有非法字符登录503
刚刚群友 @Godtokoo 反馈了无法登录的问题，一开始以为是CDN缓存导致。结果发现是触发了discuz的xss注入检测机制xss_check和系统错误机制system_error，附上我的解决方式
首先打开 \source\class\discuz的discuz_application.php 查找
private function _xss_check() {
static $check = array('"', '>', '<', '\'', '(', ')', 'CONTENT-TRANSFER-ENCODING');
if(isset($_GET['formhash']) && $_GET['formhash'] !== formhash()) {
system_error('request_tainting');
}
if($_SERVER['REQUEST_METHOD'] == 'GET' ) {
$temp = $_SERVER['REQUEST_URI'];
} elseif(empty ($_GET['formhash'])) {
$temp = $_SERVER['REQUEST_URI'].file_get_contents('php://input');
} else {
$temp = '';
}
if(!empty($temp)) {
$temp = strtoupper(urldecode(urldecode($temp)));
foreach ($check as $str) {
if(strpos($temp, $str) !== false) {
system_error('request_tainting');
}
}
}
return true;
}替换为
private function _xss_check() {
$temp = strtoupper(urldecode(urldecode($_SERVER['REQUEST_URI'])));
if(strpos($temp, '<') !== false || strpos($temp, '"') !== false || strpos($temp, 'CONTENT-TRANSFER-ENCODING') !== false) {
system_error('request_tainting');
}
return true;
}然后后台清除缓存就解决了。
新版的文件是这样的
private function _xss_check() {
static $check = array('"', '>', '<', '\'', '(', ')', 'CONTENT-TRANSFER-ENCODING');
if(isset($_GET['formhash']) && $_GET['formhash'] !== formhash()) {
if(defined('CURMODULE') && constant('CURMODULE') == 'logging' && isset($_GET['action']) && $_GET['action'] == 'logout') {
header("HTTP/1.1 302 Found");
header("Location: index.php");
exit();
} else {
system_error('request_tainting');
}
}
if($_SERVER['REQUEST_METHOD'] == 'GET' ) {
$temp = $_SERVER['REQUEST_URI'];
} elseif(empty ($_GET['formhash'])) {
$temp = $_SERVER['REQUEST_URI'].http_build_query($_POST);
} else {
$temp = '';
}
if(!empty($temp)) {
$temp = strtoupper(urldecode(urldecode($temp)));
foreach ($check as $str) {
if(strpos($temp, $str) !== false) {
system_error('request_tainting');
}
}
}
return true;
}
也可以直接替换上面的吗 你好，想咨询一下现在奶昔用的是那套模板哈，很喜欢这种简洁风格！ @Nyarime
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