B1_Chapter 1v2.pdf - INTRODUCTION TO SOFTWARE SECURITY...

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INTRODUCTION TO SOFTWARE SECURITY Building Secure Software Chapter 1 1
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It’s All about the Software The Internet continues to change the role that software plays in the business world Accessing applications through firewalls Protecting data using cryptology Internet-enabled applications Beginning early Complex systems It’s more of a risk management 2
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Hackers, Crackers, and Attackers Malicious hackers don’t create security holes; they simply exploit them Real problem: bad software design and implementation Hackers hated the negative meaning carried by their name Cracker: breaks software for immoral ends 3
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Dealing with Widespread Security Failures Security holes are common in software 20 new vulnerabilities in software are made public each week 4
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Dealing with Widespread Security Failures Tried-and-true software Consequences of security flaws vary Remote vs. local attacks Sources for vulnerability information: Bugtraq Mailing list Securityfocus.com CERT Operated by Carnegie Mellon University Too late to be effective RISK Digest Forum Comp.risks Covers all kinds of security risks 5
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Dealing with Widespread Security Failures The above resources aren’t the only sources of novel information They are the most popular They create a huge data knowledge that makes it hard for admins to follow and apply Not the system administrator’s fault 6
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Technical Trends Affecting Software Security Complex systems introduce multiple risks: Adding malicious functions to the design discovered late Hard to understand and analyze hard to secure Security is difficult to get right even in simple systems
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