阿里云提示 Didcuz memcache+ssrf GETSHELL漏洞修复方法

近期很多使用阿里云的站长收到了阿里云给出的漏洞消息，漏洞名称如下：

Discuz memcache+ssrf GETSHELL漏洞

这里给大家提供一个简单的修复方案！

首先找到这个文件

source/function/function_core.php

搜索代码：

function output_replace($content) {
global $_G;
if(defined('IN_MODCP') || defined('IN_ADMINCP')) return $content;
if(!empty($_G['setting']['output']['str']['search'])) {
if(empty($_G['setting']['domain']['app']['default'])) {
$_G['setting']['output']['str']['replace'] = str_replace('{CURHOST}', $_G['siteurl'], $_G['setting']['output']['str']['replace']);
}
$content = str_replace($_G['setting']['output']['str']['search'], $_G['setting']['output']['str']['replace'], $content);
}
if(!empty($_G['setting']['output']['preg']['search']) && (empty($_G['setting']['rewriteguest']) || empty($_G['uid']))) {
if(empty($_G['setting']['domain']['app']['default'])) {
$_G['setting']['output']['preg']['search'] = str_replace('\{CURHOST\}', preg_quote($_G['siteurl'], '/'), $_G['setting']['output']['preg']['search']);
$_G['setting']['output']['preg']['replace'] = str_replace('{CURHOST}', $_G['siteurl'], $_G['setting']['output']['preg']['replace']);
}

foreach($_G['setting']['output']['preg']['search'] as $key => $value) {
$content = preg_replace_callback($value, create_function('$matches', 'return '.$_G['setting']['output']['preg']['replace'][$key].';'), $content);
}
}

return $content;
}

添加一行代码，如下

function output_replace($content) {
global $_G;
if(defined('IN_MODCP') || defined('IN_ADMINCP')) return $content;
if(!empty($_G['setting']['output']['str']['search'])) {
if(empty($_G['setting']['domain']['app']['default'])) {
$_G['setting']['output']['str']['replace'] = str_replace('{CURHOST}', $_G['siteurl'], $_G['setting']['output']['str']['replace']);
}
$content = str_replace($_G['setting']['output']['str']['search'], $_G['setting']['output']['str']['replace'], $content);
}
if(!empty($_G['setting']['output']['preg']['search']) && (empty($_G['setting']['rewriteguest']) || empty($_G['uid']))) {
if(empty($_G['setting']['domain']['app']['default'])) {
$_G['setting']['output']['preg']['search'] = str_replace('\{CURHOST\}', preg_quote($_G['siteurl'], '/'), $_G['setting']['output']['preg']['search']);
$_G['setting']['output']['preg']['replace'] = str_replace('{CURHOST}', $_G['siteurl'], $_G['setting']['output']['preg']['replace']);
}

if (preg_match("(/|#|\+|%).*(/|#|\+|%)e", $_G['setting']['output']['preg']['search']) !== FALSE) { die("request error"); }//本行代码为新增代码

foreach($_G['setting']['output']['preg']['search'] as $key => $value) {
$content = preg_replace_callback($value, create_function('$matches', 'return '.$_G['setting']['output']['preg']['replace'][$key].';'), $content);
}
}

return $content;
}

然后将修改好的文件保存，上传到服务器目录覆盖一下，然后去阿里云对应漏洞提示后面点击“验证一下”，验证时候漏洞提示就会消失！

问题解决！