Network Security Overview Ali Shayan

Network Security Management’s Perspective Dangers: – Negligence – Dereliction of duty – Liable for damaged – Misconduct – Sabotage – Aiding and abetting crime

Network Security Management’s Perspective Issues – Training – Continuity and crisis planning – Assume information security is YOUR responsibility Lack of awareness can lead to negligence and liability!

Understanding Components of an IT Security Audit

Modern Technology Roadmap Early 1990s: Virus scanners Mid 1990s: Firewalls Late 1990s: Over-reliance on encryption (PKI) Early 2000s: Over-reliance on intrusion detection systems (IDS) Late 2000s: Over-reliance on intrusion prevention systems/artificial intelligence

Vulnerabilities There was a total of 7,247 vulnerabilities in 2006, 39.5% more than June was the busiest month of the year with 696 vulnerabilities. Week 46 (the week before Thanksgiving) was the busiest week of 2006 for new vulnerabilities. The most popular day for vulnerability discloser was Tuesday. The top three vulnerable vendor in 2006 were Microsoft, Oracle and Apple percent of all 2006 vulnerabilities could be exploited remotely. Over half (50.6%) of 2006 vulnerabilities would allow an attacker to gain access to the host after successful exploitation.

Vulnerabilities Per Annum Vulnerabilities Count

Vulnerabilities Per Month

Vulnerabilities by Day of Week

Vulnerabilities Weekdays vs. Weekends

Vulnerabilities Top Ten Vulnerable Vendors

From which countries does spam originate?

Incident and Events by Sector

Quantifying by Losses 9 out of 10 businesses affected by cybercrime (FBI 2005) $67.2 billion per year is lost to cybercrime in the USA (FBI 2005) 61% of US computers are compromised (Cyber Security Alliance 2006) Estimated 14,000 – 17,000 Botnet C&Cs (Shadowserver.org)

Notable Trends in Cyber Criminality Motivation: Financial motives are making attackers more sophisticated. Targeted attacks: Attacks are much more targeted than before. Targets: The user and the user workstation (desktop or laptop) becomes the easiest path into the network.

References

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