Openvas no Centos 7

OpenVAS known as Open Vulnerability Assessment System is the open source vulnerability suite to run the test against servers for known vulnerabilities using the database (Network Vulnerability Tests), OpenVAS is a free software, its components are licensed under GNU General Public License (GNU GPL). Here is the small guide to setup the OpenVAS on CentOS 7 / RHEL 7.

Setup Repository:

Issue the following command in the terminal to install atomic repo.

# wget -q -O - http://www.atomicorp.com/installers/atomic |sh

Accept the license Agreement.

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All atomic repository rpms are UNSUPPORTED.
Do you agree to these terms? (yes/no) [Default: yes] yesConfiguring the [atomic] yum archive for this systemInstalling the Atomic GPG key: OK
Downloading atomic-release-1.0-19.el7.art.noarch.rpm: OKThe Atomic Rocket Turtle archive has now been installed and configured for your system
The following channels are available:
atomic          - [ACTIVATED] - contains the stable tree of ART packages
atomic-testing  - [DISABLED]  - contains the testing tree of ART packages
atomic-bleeding - [DISABLED]  - contains the development tree of ART packages

System Repo (Only for RHEL):

OpenVAS installation requires additional packages to be downloaded from internet, if your system does not have Redhat subscription you need to setup the CentOS repository.

# vi /etc/yum.repos.d/centos.repo

Add the following lines.

[CentOS] name=centos baseurl=http://mirror.centos.org/centos/7/os/x86_64/ enabled=1 gpgcheck=0

PS: CentOS machines do not requires the above repo setup, system automatically creates it during the installation.

Install & Setup OpenVAS:

Issue the following command to install OpenVAS.

# yum -y install openvas

Once the installation is completed, start the OpenVAS setup.

# openvas-setup

Setup will start to download the latest database from internet, Upon completion, setup would ask you to configure listening ip address.

Step 2: Configure GSAD The Greenbone Security Assistant is a Web Based front end for managing scans. By default it is configured to only allow connections from localhost. Allow connections from any IP? [Default: yes] Restarting gsad (via systemctl):                           [  OK  ]

Configure admin user.

Step 3: Choose the GSAD admin users password.
The admin user is used to configure accounts,
Update NVT's manually, and manage roles.
Enter administrator username [Default: admin] : admin
Enter Administrator Password:
Verify Administrator Password:

Once completed, you would see the following message.
Setup complete, you can now access GSAD at:

https://youripaddress:9392

Disable Iptables.

# systemctl stop iptables.service

Create Certificate for OpenVAS manager.

# openvas-mkcert-client -n om -i

You do not require to enter any information, it will automatically creates for you.

Generating RSA private key, 1024 bit long modulus
…………………..++++++
………………………..++++++
e is 65537 (0x10001)
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter ‘.’, the field will be left blank.
—–
Country Name (2 letter code) [DE]:State or Province Name (full name) [Some-State]:Locality Name (eg, city) []:Organization Name (eg, company) [Internet Widgits Pty Ltd]:Organizational Unit Name (eg, section) []:Common Name (eg, your name or your server’s hostname) []:Email Address []:Using configuration from /tmp/openvas-mkcert-client.2827/stdC.cnf
Check that the request matches the signature
Signature ok
The Subject’s Distinguished Name is as follows
countryName           :PRINTABLE:’DE’
localityName          :PRINTABLE:’Berlin’
commonName            :PRINTABLE:’om’
Certificate is to be certified until Aug  5 19:43:32 2015 GMT (365 days)Write out database with 1 new entries
Data Base Updated
Your client certificates are in /tmp/openvas-mkcert-client.2827 .You will have to copy them by hand.

Now Rebuild the OpenVAS database (If required)

# openvasmd --rebuild

Once Completed, Start the OpenVAS manager.

# openvasmd

Open your browser and point to https://your-ip-address:9392. Login as admin using the password created by you.

CentOS 7 – OpenVAS Login

You can start the quick scan by entering ip address in the quick scan field.

CentOS 7 – Scan Machine

After that you would the see immediate task like below. currently 98% scanning is completed

CentOS 7 – Scanning Status

Click on the task to view the details of the scan, details will be like below. Once the scan is completed, click on “Date” to see the report.

CentOS 7 – VA Scanning Completed

In report page you have option to download the report in multiple format like pdf, html,xml, etc,.. or you can click on the each Vulnerability to see the full information.

CentOS 7 – OpenVAS Report Page

Actual report will look like below.

CentOS 7 – OpenVAS Report

At this point, OpenVas is setup and configured. However, you will not be able to log into the web interface yet As of CentOS 7, iptables was replaced with firewalld (which I do not like). So, we’re going to disable firewalld. If you want to install iptables in it’s place, click here to see my guide on removing firewalld and installing iptables on CentOS 7. For now, we’re just going to disable firewalld.

systemctl mask firewalld

systemctl stop firewalld

Now you will be able to login to the web interface of OpenVAS by navigating to https://:9392 But, you will not be able to run any scans. If you try, it will error out and you’ll get this error on your report.

WARNING: Cannot connect to KB at '/tmp/redis.sock': Connection refused'

To resolve this, we need to make a couple changes to redis and disable SELinux.

echo "unixsocket /tmp/redis.sock" >> /etc/redis.conf

sed -i 's/enforcing/disabled/g' /etc/selinux/config /etc/selinux/config

systemctl enable redis.service

shutdown -r now

After the reboot is complete, wait about 5 minutes for OpenVAS to load up. It can take a few minutes. Then, you’re ready to log into the web interface and run your first scan! Navigate to https://:9392 and login with username admin and the password you specified earlier.