Denial-of-Service(DoS) Attacks

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Types of DoS attack (from textbook- redbook) • 1. network device level - by taking advantage of bugs or weaknesses in software or by exhausting the hardware resources of network devices. – a buffer overrun error in the password checking routine. Using this, certain routers could crash if the connection to the router is performed via telnet and extremely long passwords are entered. source: pp.119, Chap.8 Network Security - current status and future directions, edited by Christos Douligeris et al.
Types of DoS attack (from textbook- redbook) • 2. operating system (OS) level DoS attacks - take advantage of the ways protocols are implemented by OSs. – E.g. ping of death • 3. Application-based attacks - try to settle a machine or a service out of order either by exploiting bugs in network applications that are running on the target host or by using such applications to drain the resources of their victim. – E.g. finger bomb , finger war by TCP/Wrapper • 4. data flooding attacks - an attacker attempts to use the bandwidth available to a network, host, or device at its greatest extent by sending it massive quantities of data to process. – E.g. flooding • 5. protocol features attack - take advantage of certain standard protocol features. – E.g. several attacks exploit the fact that IP source addresses can be spoofed. – E.g. attack the domain name system (DNS) cache on name servers.
Page 1 and 2: IMS584 (네트워크보안) Redbook
Page 3 and 4: DoS attack examples - the old types
Page 5 and 6: DoS attack examples - SYN flooding
Page 7 and 8: DoS attack examples - SYN flooding
Page 9 and 10: DoS attack example - application le
Page 11 and 12: DoS attack examples - LAND attack
Page 13: DoS attack example - local resource
Page 17 and 18: DoS Defense problems (cont’) •
Page 19 and 20: DDoS attack example - the old type
Page 21 and 22: DDoS attack example - the old type
Page 23 and 24: DDoS attack procedures • 1. selec
Page 25 and 26: DDoS attack categories - degree of
Page 27 and 28: DDoS attack categories - amplificat
Page 29 and 30: DDoS attack categories - Attack Rat
Page 31 and 32: 현재의 DDoS 공격 방식과 과
Page 33 and 34: DDoS attack defense mechanism • F
Page 35 and 36: DDoS attack defense mechanism - int
Page 37 and 38: DDoS attack defense mechanism - int
Page 39 and 40: Consensus Roadmap for Defeating Dis
Page 41 and 42: Reference sites for writing your pa
Page 44 and 45: BOT, BOTNET • 봇(Bot) : 사용
Page 46 and 47: 왜 BOTNET 이 위험한가 • BOT
Page 48 and 49: 아이템베이 공격 사례 •
Page 50 and 51: BOTNET 의 유형 • 중앙집중
Page 52 and 53: BOTNET 의 유형 진화 • 다수
Page 54 and 55: BOTNET 간 전쟁 • 전통 봇넷
Page 56: References • www.botnet.co.kr •

Denial-of-Service(DoS) Attacks

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