Aaron
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35 lines
1.2 KiB
Markdown
35 lines
1.2 KiB
Markdown
# GitLab 远程命令执行漏洞（CVE-2021-22205）
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GitLab是一款Ruby开发的Git项目管理平台。在11.9以后的GitLab中，因为使用了图片处理工具ExifTool而受到漏洞[CVE-2021-22204](https://devcraft.io/2021/05/04/exiftool-arbitrary-code-execution-cve-2021-22204.html)的影响，攻击者可以通过一个未授权的接口上传一张恶意构造的图片，进而在GitLab服务器上执行任意命令。
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参考链接：
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- https://hackerone.com/reports/1154542
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- https://devcraft.io/2021/05/04/exiftool-arbitrary-code-execution-cve-2021-22204.html
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- https://security.humanativaspa.it/gitlab-ce-cve-2021-22205-in-the-wild/
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- https://github.com/projectdiscovery/nuclei-templates/blob/master/cves/2021/CVE-2021-22205.yaml
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## 漏洞环境
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执行如下命令启动一个GitLab 13.10.1版本服务器：
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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:8080`即可查看到GitLab的登录页面。
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## 漏洞复现
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GitLab的/uploads/user接口可以上传图片且无需认证，利用[poc.py](poc.py)脚本来测试这个漏洞：
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```
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python poc.py http://your-ip:8080 "touch /tmp/success"
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```
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进入容器内，可见`touch /tmp/success`已成功执行：
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