The world’s most advanced Open Source vulnerability scanner
OpenVAS is a framework of several services and tools offering a comprehensive and powerful vulnerability scanning and vulnerability management solution.
The Open Vulnerability Assessment System (OpenVAS) is a framework of several services and tools offering a comprehensive and powerful vulnerability scanning and vulnerability management solution.
The actual security scanner is accompanied with a daily updated feed of Network Vulnerability Tests (NVTs), over 20,000 in total (as of January 2011).
All OpenVAS products are Free Software. Most components are licensed under the GNU General Public License (GNU GPL).

Download Here: OPENVAS
OpenVAS for Ubuntu
you can install OpenVAS for Ubuntu via OBS

Step 1: Configure OBS Repository

sudo apt-get -y install python-software-properties
sudo add-apt-repository "deb http://download.opensuse.org/repositories/

security:/OpenVAS:/STABLE:/v4/xUbuntu_10.04/ ./"

sudo apt-key adv --keyserver hkp://keys.gnupg.net --recv-keys BED1E87979EAFD54
sudo apt-get update

 
Step 2: Quick-Install OpenVAS

sudo apt-get -y install greenbone-security-assistant gsd openvas-cli openvas-manager

openvas-scanner openvas-administrator sqlite3 xsltproc

Step 3: Quick-Start OpenVAS
(copy and paste whole block, during first time you will be asked to set a password for user “admin”)

test -e /var/lib/openvas/CA/cacert.pem  || sudo openvas-mkcert -q
sudo openvas-nvt-sync
test -e /var/lib/openvas/users/om || sudo openvas-mkcert-client -n om -i
sudo /etc/init.d/openvas-manager stop
sudo /etc/init.d/openvas-scanner stop
sudo openvassd
sudo openvasmd --migrate
sudo openvasmd --rebuild
sudo killall openvassd
sleep 15
sudo /etc/init.d/openvas-scanner start
sudo /etc/init.d/openvas-manager start
sudo /etc/init.d/openvas-administrator restart
sudo /etc/init.d/greenbone-security-assistant restart
test -e /var/lib/openvas/users/admin || sudo openvasad -c add_user -n admin -r Admin

Step 4: Log into OpenVAS as “admin”

Open https://localhost:9392/ or start "gsd" on a command line as a regular user (not as root!).

Visit the official site here: http://www.openvas.org/