Network Security Tools

Software Security

Presented byEmanuela Boroș

“Al. I. Cuza” University, Faculty of Computer ScienceMaster of Software Engineering, II

Network Security Tools

Audit/Port Scanning Tools

● Nessus (Vulnerability scanner) #3

● SAINT (Vulnerability scanner, Based on SATAN,developed by World Wide Security,Inc.) #110

● Sara (Security Auditor’s Research Assistant, SANS Top 10 Threats, 1 May 2009)

● Nmap, strobe (Port scanners, strobe was one of the earliest port scanning tools, Nmap is the strobe's grandson)

Nessus Scanner

Nessus Scanner

● Available from http://www.nessus.org/products/nessus/● The world leading vulnerability scanner● Free for home users, licensed on a yearly subscription

for commercial businesses● Easy-to-use tool● Linux/Solaris/Windows/Android/iPhone● Provides HTML based reports ● Client/server architecture: clients (Windows, Unix,

Android, iPhone) & servers (Unix only)

Pros/Cons

Pros ● Free vulnerability scanning● Easy to install and use● Up-to-date security vulnerability database● Free for home users● Powerful plug-in architecture

Cons● Needs activation code● Some UI issues

Policies

A Nessus “policy” consists of configuration options related to performing a vulnerability scan.

● External Network Scan ● scans externally facing hosts● XSS plugin families● all 65,535 ports are scanned

● Internal Network Scan● scans large internal networks with many hosts, several exposed services, and

embedded systems such as printers● standard set of ports is scanned

● Web App Tests● scans for vulnerabilities present in each of the parameters, including XSS,

SQL, command injection● Prepare for PCI DSS audits

● enables the built-in PCI DSS compliance checks that compare scan results with the PCI standards and produces a report on your compliance posture

Server

Pros/Cons

Client

Case Studies

Version: 4.4.1 Feed Type: Home OS: Windows 7/Android

Internal Network Scan

● Default policy● scans large internal networks with many hosts, several exposed services, and

embedded systems such as printers● standard set of ports is scanned

Web Application Scanning With Credentials

Steps

● App that requires authentication

● Create a policy● General - Port 80● Preferences

● HTTP login page● Login page and login form (may be a different form)● Look into you html and see what name fields or you can

use a sniffer What it is used into a post request● Ability to check for auth – login successfully with a timer

– go to this page every delay to see if you're still logged – with a 120 seconds and you should see a regex Logout

● Web mirroring – regular expressions to exclude things – web spider to exclude logout.php cause that would log you out

Windows Scanning

Conclusions

Using Android Nessus app

Nmap

Nmap

● Insecure.Org

● free utility which can quickly scan broad ranges of devices and provide valuable information about the devices on your network

● uses raw IP packets to determine what hosts are available on the network

● used by attackers to scan a network and perform reconnaisance about the types and quantities of targets available and what weaknesses exist

Nmap with Nessus

Advantages

● smart penetration testing

● nmap the best scanner ever and nessus one of our favorite vulnerability scanner

● effective and less time consumer

Case Study

Steps

● used nmap for a quick scan on the local network to all the hosts in the subnet

● after the scan there will be different hosts and their open ports