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CSCI 530 Lab

CSCI 530 Lab. Software Security. Software Security. In a sense, everything in security can fall under the category of software security Hardware needs software to do useful things Firewalls, IDS, etc. are all software or comprise of both hardware and software

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CSCI 530 Lab

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  1. CSCI 530 Lab Software Security

  2. Software Security • In a sense, everything in security can fall under the category of software security • Hardware needs software to do useful things • Firewalls, IDS, etc. are all software or comprise of both hardware and software • For our purposes, we are talking about securing an application that provides a service for users • Normally web applications, but not limited

  3. Operating Systems and Security • Two considerations • Internal Security • Protecting the system from running programs • Examples • Accidentally modifying the ntuser.dat file using Microsoft Word • SubSeven trojan horse making system wide modifications • External • Protecting the system from an external user or program through the use of ports • Examples: • Denial-of-Service Attacks • Port Scanners

  4. Ports and Services • Ports are windows into the system • A program opens a port so that there can be communication between that program and another system • Example: Web Browsers • Runs on port 80 • Allow communication between your system and a web server • What ports are open and what opens them? • Last lab we ran nmap, which is a port scanner, and you were able to see a report as to which ports were open and what programs ran on those ports • This is important because a hacker will try to break into your system through an open port

  5. Modern day hacking techniques • We must understand how hackers think so we can attempt to predict their actions and take the appropriate precautions and countermeasures • Old school: break the operating system • Popular with Windows 95/98, earlier versions of 2000, old versions of linux • Operating systems were not built with security in mind • New school: break the application • Modern operating systems have security as a high priority • Easier to break a program running on a port than it is to break the O.S. • Example: breaking into apache using a cross-site script • Takes advantage of sloppy programming

  6. How do we prevent modern hackers • Keep your systems up-to-date • Service Packs, patches, etc. • Do not run unnecessary programs • They could open ports without you knowing • Regularly try to break into your systems • Using a technique called penetration testing • To be covered in the next lab

  7. How do we protect our software • Be better programmers  • Write your software with a security based mindset • Always validate input in multiple ways • Remove unnecessary code • Clean up your code for easy testing • Test, test, test!!! • Test all possible input ranges • Sloppy programming makes hacking systems easier

  8. This week’s lab • We are going to set up a webserver, running a bank software • The software has some glaring holes, and you are going to practice exploiting these vulnerabilities • This lab is designed for you to understand the necessity to be better programmers

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