Security Convergence Seminar

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Security Convergence Seminar

• Proactive Network Security Solutions Staying
  One Step Ahead of the Hacker

Joseph E. Krull, CPP, CISSP, IAM Principal Krull
Security Consulting San Antonio, Texas
USA www.krullsecurity.com
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Presentation Outline

• Network Security Then and Now
• The Evolving Attack Scenario
• Network Security Trends
• Some Predictions
• New Technologies and Methods
• Some Network Security Best Practices
• QA

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Network Security Circa 1997-1998aka The Good
Old Years

• Normal Defenses
• Simple Firewalls
• ACLs
• Desktop AntiVirus

4
Network Security 2004 Fingers in the Dike

IDS
IDS
IDS
Local Users
Network/Event Management
Wireless Access Points
Server Farms
5
Todays Network Security Challenges

• Network and Application Complexity
• Need For Absolute Connectivity and Reliability
  (24/7/365)
• Multiple Vulnerabilities in Common Software
  Packages (Patching)
• Time to Exploit Now Measured in Days (Or Hours)
• Fixed or Diminishing Resources
• Attack Tools Rapidly Improving
• Most Security Solutions Reactive in Nature

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Todays Common Headaches

• Virus and Worm Propagation Nearly Daily
  Occurrence
• SPAM Rapidly Moving Target
• DoS/DDoS Attacks Easy to Launch
• Web Based Attacks Difficult to Detect
• Internal Attacks and Abuse
• Social Engineering
• Theft of Customer and Proprietary Information

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Network Security Some Observations

• In 2002, there were 4,137 software
  vulnerabilities discovered. On average it takes
  an hour to fix each exploit on each infected
  machine. You do the math., Security Wire
  Perspectives
• The Code Red worm cost U.S. corporations in
  excess of 2.6 billion., Computer Economics
• Last year it took 26 days between the discovery
  of the vulnerabilityand the release of the
  Blaster worm that exploited it, but last
  month(April 2004) it took just 36 hours between
  the discovery of a vulnerability in Internet
  Security Systems' RealSecure and BlackIce
  firewall software and the release of the Witty
  worm, which took advantage of the flaws.,
  Information Security Magazine

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Traditional Types of Attacks

• UDP Flood
• UDP flood with ICMP Back Scattering
• ICMP Flood
• Smurf Attack
• TCP Flood
• Targa Attack (Mixed Flood)
• SYN Flood
• Naptha (Connection Flood)
• Misuse of TCP Resources

• Misuse of Application Resources
• Network/Host/Application Scan
• Brute Force Attacks
• Land Attack
• Telnet Attack
• Anti Spoof
• Protocol Violation Attacks
• TCP State Machine Violations
• FTP Bounce Attack

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Attack Predictions and Prognosis(Joes
Predictions)

• More Prevalent and Sophisticated Blended
  Attacks
• Constant DoS/DDoS Activity
• Automated Super Worms
• Continued Social Engineering
• More Web Based Exploits/Fraud
• Identity Fraud
• Vulnerabilities Due to Hybrid Technologies
• VoIP, 802.11, New Devices/Platforms, etc.

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Why Is Proactivity So Important?Case Study
SQL Slammer
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SQL Slammer (aka Sapphire)

• Started 530 UTC Jan 25 in Asia
• Infected 90 of Targets Worldwide Within 10
  Minutes
• Fastest Spreading Internet Worm
• Code Size Only 376 Bytes (404 Bytes UDP) Code
  Red 4KB/Nimda 60KB
• Infected Microsoft SQL and MSDE 2000 Servers
  Known Vulnerability Since July 2002
• Exploited Port 1434 Open to Internet

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Slammer/Sapphire (Continued)

• Over 200,000 Servers Infected With Resultant
  Denial of Service
• 55 Million Scans Per Second
• Worm Very Sophisticated With Random Number
  Generator and Rapidly Changing IP Addresses
• Significant Impact on E-Mail, ATMs, Airline
  Reservations
• Korea and USA Especially Hit
• lt 1B in Lost Revenue and Clean-Up

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Server To Server Worms

• Could Have Been Avoided By Up To Date Patching
• Properly Maintained IDS and Firewall Could Detect
  and Block UDP On Port 1434 Inbound/1433 Outbound
• IPS Could Block Worms Scanning Activity
• More Than 150 Commercial Products Have MS
  SQL/MSDE Embedded
• See www.sqlsecurity.com For List

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Help Is On The Way

• Firewalls
• Then Policy Based
• Now Deep Packet Inspection and Application
  Aware
• Intrusion Defense
• Then Detection
• Now Prevention
• Anti-Virus and Intrusion
• Then Signature Based Detection
• Now Heuristics and Behavior
• Anti-Spam
• Then Black and White Lists
• Now Source Based Analysis

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Defenses Rapidly Evolving

• From Servers to Dedicated Server Appliances
• Multi-Functional Security Platforms
• Less Reliance on Security Product Updates
• Links Between Patching and Vulnerabilities
• Hardened Operating Systems and Platforms
• Less Management Overhead and Simplified Use

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Some Network Security Best Practices

• Clear Acceptable Use Policies For Employees,
  Consultants and Business Partners
• CEO and Management Team Buy In For Security
  Programs
• IT Products and Security Solutions From Multiple
  Vendors
• Maximum Network Segmentation (VLANs, Remote
  Sites, 3rd Party Hosting, etc.)
• Blocking Vulnerable Applications at the Gateway
  (P2P, Chat, IM, WebMail, etc.)
• Blocking Certain File Types at the Gateway (.exe,
  .pif, ,scr, .zip, etc.)
• Business Necessity Versus Nice to Have (VoIP,
  HTML Based Videoconferencing, Remote Access,
  etc.)

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Network Security A Layered Approach

WAN
Security/Event Management Plus Vulnerability
Assessment

• 1st Layer
• Gateway IPS/IDS
• Gateway Content Filtering
• Gateway E-Mail Protection/AntiSPAM

• Must Have
• Organizational Firewalls
• Desktop Antivirus
• Desktop Protection

• 2nd Layer
• Host Based IDS
• Application Based IDS

Local Users
Server Farms
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Joseph E. Krull, CPP, CISSP, IAM Krull Security
Consulting 17342 Fountain Bluff San Antonio,
Texas 78248 USA www.krullsecurity.com info_at_krulls
ecurity.com Tel. [phone]