# RPC & NFS Pentesting (Port 111, 2049)

> NFS  allows systems to access and share files over a network as if they were local. RPC enables programs to execute functions on remote systems, supporting services like NFS through netw communication

Source: https://pentest.h4rithd.com/tcp/2049-nfs/  
Section: TCP  
Ports: 111, 2049  
Updated: 2026-10-26  
Author: Harith Dilshan (h4rithd), https://h4rithd.com

### 01 Basic Enumerations

```bash
## ------------------| Nmap Scan
sudo nmap --script nfs* -sV -p111,2049 <IP>

## ------------------| List mounts
showmount -e <IP>

## ------------------| List both the client and hostname or IP
showmount -a <IP>
```

### 02 Mount option

```bash
sudo mkdir -p /mnt/remote
sudo mount -t nfs <IP>:/ /mnt/remote
sudo mount -t nfs <IP>:/ /mnt/remote -o nolock
sudo mount -t nfs <IP>:/site_backups /mnt/remote
sudo mount -t nfs <IP>:/site_backups /mnt/remote -o nolock
```

### 03 Privilege Escalation

```bash
### If the “no_root_squash” option is present on a writable share, we can create an executable with SUID bit set and run it on the target system         
## ------------------| Check if no_root_squash is present?
cat /etc/exports | grep no_root_squash

## ------------------| List mounts and mount it to our local machine
showmount -e <IP>
sudo mkdir -p /mnt/new
sudo mount -t nfs <IP>:/<WritableShares> /mnt/new
sudo mount -t nfs -o vers=2 <IP>:/<WritableShares> /mnt/new

### Create a SUID binary and place it. then execuite it via attackers machine.
```