Step-by-Step Guide to Installing and Using Greenbone Vulnerability Manager on Kali Linux

Last updated: Nov 30, 2024

Greenbone Vulnerability Manager is a software framework that includes several tools (OpenVas, WebUI…) to perform vulnerability scans.

Indeed, thanks to this software framework, we can scan an entire network or a single host to see if it is prone to known vulnerabilities.

Historically, Greenbone Vulnerability Manager is a fork of the Nessus scanning tool, which is now proprietary software.

Main features:
- Vulnerability scan
- Nessus fork
- Able to identify security holes in a computer network

Kali Linux Release: 2024.3

Install GVM

Install

Here's how to install Greenbone Vulnerability Manager on our Kali Linux.

First let's update the packages:

kali@kali:~$ sudo apt update && sudo apt dist-upgrade

Install all the necessary packages:

kali@kali:~$ sudo apt install gvm postgresql nsis

Run the setup script:
- Which will:
  - Start services and create PostgreSQL database
  - Create GVM certificate files
  - Apply permissions
  - Update vulnerability databases
  - Create and set up admin account

kali@kali:~$ sudo gvm-setup

If you get the error message The default PostgreSQL version (16) is not 17 that is required by libgvmd, you need to swap the PostgreSQL listening ports:

kali@kali:~$ sudo gvm-setup
[>] Starting PostgreSQL service
[-] ERROR: The default PostgreSQL version (16) is not 17 that is required by libgvmd
[-] ERROR: libgvmd needs PostgreSQL 17 to use the port 5432
[-] ERROR: Use pg_upgradecluster to update your PostgreSQL cluster

Here is an example with the sed command, which sets port 5432 for PostgreSQL 17 and 5433 for PostgreSQL 16:

kali@kali:~$ sudo sed -i 's/port = 5433/port = 5432/' /etc/postgresql/17/main/postgresql.conf

kali@kali:~$ sudo sed -i 's/port = 5432/port = 5433/' /etc/postgresql/16/main/postgresql.conf

Restart the PostgreSQL service for the changes to take effect:

kali@kali:~$ sudo systemctl restart postgresql

[…]
[*] Please note the password for the admin user
[*] User created with password 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx'.

[>] You can now run gvm-check-setup to make sure everything is correctly configured

Please note the password of the user admin.

Start gvmd and gsad services:

kali@kali:~$ sudo systemctl start gvmd.service && sudo systemctl start gsad.service

Run the check script:

kali@kali:~$ sudo gvm-check-setup
[…]
It seems like your GVM-23.11.0 installation is OK.

Check that the gvmd service is running:

kali@kali:~$ sudo systemctl status gvmd.service

Check that the WebUI is waiting for a connection:

kali@kali:~$ sudo ss -ltn4p
State         Recv-Q        Send-Q                Local Address:Port                 Peer Address:Port        Process                                                          
LISTEN        0             4096                         127.0.0.1:9392                       0.0.0.0:*            users:(("gsad",pid=2243,fd=10))

Add the right to create tasks to the default admin:

kali@kali:~$ sudo gvmd --modify-setting 78eceaec-3385-11ea-b237-28d24461215b --value admin

You should now be able to connect to the https://127.0.0.1:9392 address using the admin login and the associated password (use the one displayed earlier in the gvm-setup phase):

Greenbone Security Assistant login page showing username and password fields

Change listening interface (Optional)

In its default configuration, the Greenbone Security Assistant (GSA) (WebUI) can only be accessed via the local address (127.0.0.1). To connect to the WebUI from other hosts, you need to modify the systemctl configuration.

Edit the /usr/lib/systemd/system/gvmd.service file:

[Unit]
Description=Greenbone Vulnerability Manager daemon (gvmd)
After=network.target networking.service postgresql.service ospd-openvas.service
Wants=postgresql.service ospd-openvas.service
Documentation=man:gvmd(8)
ConditionKernelCommandLine=!recovery

[Service]
Type=forking
User=_gvm
Group=_gvm
PIDFile=/run/gvmd/gvmd.pid
RuntimeDirectory=gvmd
RuntimeDirectoryMode=2775
#ExecStart=/usr/sbin/gvmd --osp-vt-update=/run/ospd/ospd.sock --listen-group=_gvm
ExecStart=/usr/sbin/gvmd --osp-vt-update=/run/ospd/ospd.sock -a 0.0.0.0
Restart=always
TimeoutStopSec=10

[Install]
WantedBy=multi-user.target

Edit the /usr/lib/systemd/system/gsad.service file:

[Unit]
Description=Greenbone Security Assistant daemon (gsad)
Documentation=man:gsad(8) https://www.greenbone.net
After=network.target gvmd.service
Wants=gvmd.service

[Service]
Type=forking
User=_gvm
Group=_gvm
RuntimeDirectory=gsad
RuntimeDirectoryMode=2775
PIDFile=/run/gsad/gsad.pid
#ExecStart=/usr/sbin/gsad --listen 127.0.0.1 --port 9392
ExecStart=/usr/sbin/gsad --mlisten=KALI_IP_ADDRESS --listen 0.0.0.0 --port 9392
Restart=always
TimeoutStopSec=10

[Install]
WantedBy=multi-user.target
Alias=greenbone-security-assistant.service

Reload the systemd configuration:

kali@kali:~$ sudo systemctl daemon-reload

Restart the gvm services:

kali@kali:~$ sudo systemctl restart gvmd.service

kali@kali:~$ sudo systemctl restart gsad.service

Useful commands

Update Network Vulnerability Tests:

kali@kali:~$ sudo -u _gvm greenbone-nvt-sync

Keeping the feeds up-to-date:

kali@kali:~$ sudo greenbone-feed-sync --type CERT
kali@kali:~$ sudo greenbone-feed-sync --type SCAP
kali@kali:~$ sudo greenbone-feed-sync --type GVMD_DATA

Create a gvadmin user:

kali@kali:~$ sudo runuser -u _gvm -- gvmd --create-user=gvadmin --password=stPassw0rd --disable-password-policy

Get the UUIDs of all users created:

kali@kali:~$ sudo runuser -u _gvm -- gvmd --get-users --verbose

Change a user's password:

kali@kali:~$ sudo runuser -u _gvm -- gvmd --user=gvadmin --new-password=gvadmin

Using GVM

Here's how to perform our first vulnerability scan on a predefined host.

Create target

From the Configuration menu, click on Targets:

Greenbone Security Assistant interface highlighting the Configuration menu and Targets option

Click on New Target link:

Define the Target to be scanned by defining its IP address and giving it a Name:

New Target configuration window in Greenbone Security Assistant, defining a target with a manual IP address and saving the settings

Create task

From the Scans menu, click on Tasks:

Greenbone Security Assistant interface showing the Scans menu and highlighting the Tasks option

Click on New Task icon:

Greenbone Security Assistant interface highlighting the New Task option under the Scans menu

Define the New Task by defining the Name, associating the Target and checking the Schedule Once option:

New Task configuration window in Greenbone Security Assistant, defining a scan task with selected target and schedule

Click on the Play button to Start the task:

Greenbone Security Assistant dashboard showing task status with the play button highlighted to start a scan

Wait a few minutes for the task to finish, then click on the Last Report link to access the vulnerability scan report:

Greenbone Security Assistant dashboard displaying completed task status, severity results, and link to the last report

You will have a complete report:

Greenbone Security Assistant vulnerability scan report showing detected issues with severity levels and affected hosts

Dépannage

When creating the first task, you may receive the error: Failed to find config 'daba56c8-73ec-11df-a475-002264764cea'. This may be because the user does not have the right to create a task. It may also be due to the fact that not all elements have yet been downloaded. Let's see how to solve this problem.

Give task creation to the admin user:

kali@kali:~$ sudo gvmd --modify-setting 78eceaec-3385-11ea-b237-28d24461215b --value admin

This may also be due to the fact that an update is in progress (a process that takes a particularly long process during the first initialization). You can monitor the logs to check progress:

kali@kali:~$ sudo tail -f /var/log/gvm/gvmd.log
md manage:   INFO:2024-11-30 16h50.23 utc:4774: Updating /var/lib/gvm/scap-data/nvdcve-2.0-2011.xml
md manage:   INFO:2024-11-30 16h51.22 utc:4774: Updating /var/lib/gvm/scap-data/nvdcve-2.0-2018.xml
md manage:   INFO:2024-11-30 16h53.13 utc:4774: Updating /var/lib/gvm/scap-data/nvdcve-2.0-2019.xml

And also check the activity of the process gvmd in the /var/lib/gvm/ folder:

kali@kali:~$ sudo lsof +D /var/lib/gvm/
lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs
      Output information may be incomplete.
lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/109/gvfs
      Output information may be incomplete.
COMMAND  PID USER FD   TYPE DEVICE SIZE/OFF    NODE NAME
gvmd    4771 _gvm 18uW  REG    8,1        0 1493222 /var/lib/gvm/feed-update.lock
gvmd    4774 _gvm 18u   REG    8,1        0 1493222 /var/lib/gvm/feed-update.lock
gvmd    4774 _gvm 20r   DIR    8,1      4096 1453575 /var/lib/gvm/scap-data
gvmd    4774 _gvm 21r   REG    8,1 107150285 1493243 /var/lib/gvm/scap-data/nvdcve-2.0-2020.xml