Couldn't open a raw socket. Error: Permission denied (13)

Question

I am trying to get familiar with hacking and networking by doing HackTheBox challenges. At starting point Oopsie I am supposed to use command nmap -sS -A 10.10.10.28. However, after running it in Ubuntu 20.04 I got following error: Starting Nmap 7.91 ( https://nmap.org ) at 2021-01-25 20:07 CET Couldn't open a raw socket. Error: Permission denied (13). At https://github.com/microsoft/WSL/issues/2039 I read, that this feature is not implemented in nmap. Is there any way to open a raw socket in my operating system with this tool?

Answer 1

Did you install nmap using:

sudo snap install nmap

or

sudo apt install nmap

I had this same issue, I installed using snap and was getting the same error as you. If that is the case remove the snap install and use apt:

sudo snap remove nmap
sudo apt install nmap

Run a command with nmap, if you get the error:

bash: /snap/bin/nmap: No such file or directory

use the following command to let go of the cached link:

hash -r

run nmap again, this worked for me.

How I got my answer.

Answer 2

You have to grant network access to nmap with: snap connect nmap:network-control