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System Threats(系统的威胁) Worms- use spawn mechanism; standalone program(蠕虫:使用 大量复制机制;独立的程序) nternet worn(因特网蠕虫) Exploited UNIX networking features(remote access)and bugs in finger and sendmail programs.(使用UNX网络特性以及 finger、 sendmail等程序的漏洞) Grappling hook program uploaded main worm program.(ttl 程序启动蠕虫程序的主体) ° Viruses- fragment of code embedded in a legitimate program.(病毒 嵌入到合法程序中的代码片断) Mainly effect microcomputer systems.(主要影响微机系统) Downloading viral programs from public bulletin boards or exchanging floppy disks containing an infection.(从网络下载带 毒程序或者使用受到感染的软盘) Safe computing.(安全计算) Applied Operating System Concepts 19.5 Silberschatz, Galvin, and Gagne @199919.5 Silberschatz, Galvin, and Gagne ©1999 Applied Operating System Concepts System Threats(系统的威胁) • Worms – use spawn mechanism; standalone program(蠕虫:使用 大量复制机制;独立的程序) • Internet worm(因特网蠕虫) – Exploited UNIX networking features (remote access) and bugs in finger and sendmail programs.(使用UNIX网络特性以及 finger、sendmail等程序的漏洞) – Grappling hook program uploaded main worm program.(挂钩 程序启动蠕虫程序的主体) • Viruses – fragment of code embedded in a legitimate program.(病毒 :嵌入到合法程序中的代码片断) – Mainly effect microcomputer systems.(主要影响微机系统) – Downloading viral programs from public bulletin boards or exchanging floppy disks containing an infection.(从网络下载带 毒程序或者使用受到感染的软盘) – Safe computing.(安全计算)
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