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Step 1: The attacker calculates the addresses of gadget 1, gadget 2 and system call "int 0x80" in the figure through dynamic debugging and static analysis of the program. After that, the buffer overflow vulnerability of the program is used to fill the stack with the values in the designed registers.蒯彻笑道：齐王有什么可担心的呢？此事很好解决。五毒杂居，华洋相处，枪战械斗，奇情惊艳，新版《上海滩》风云再起……But in that case, Not even considering so many dangers, This performance of '74 spray' is of great use, I remember there were 4 '74 spray' on the position at that time, There are two recruits who operate them. Two veterans, Both veterans were squad leaders, All have the skills of air injection, Facing the big wasp descending from the pavement, The two of them were obviously forced to hurry, Take up the '74 spray' and aim at the position where the big wasp is relatively concentrated in the sky and spray it out. If it weren't for the critical situation at that time, the two squad leaders would definitely not have this kind of "dangerous operation", while the other two recruits watched the veterans take the lead and learned to do so. Although they had not received relevant training and the accuracy of spraying was not as good as that of veterans, they finally sprayed out and did not hurt themselves or other comrades in arms.二十年前，一位名叫奥法的8岁儿童神奇地闯入美国联邦政府电脑系统，引起联邦政府惊恐，联邦调查局如临大敌，全体出动，终将此案破获，奥法因此被尘封记忆，并判21岁前不得接触电脑。二十年后，又有一名十几岁的少年受电脑黑客传授侵入航空公司电脑网络，扰乱导航系统，使班机在飞行时，无故撞向高压电柱。电脑黑客又在动画软件中插入经伪装的暴力画面，在催眠的作用下，利用潜意识控制人的思维，毒害青少年，以致发生校园中学生杀人和自轰事件。黑客高手“千禧资讯科技”公司，不断研制一代又一代的电脑病毒，侵入网络，造成危害后，又堂而皇之地派人上门“解毒”，牟取暴利；更有甚者，他们侵入中森银行电脑系统，致使储户帐目丢失或款额改变，市民人心惶惶，争相提款，造成暴力事件；新千年来临之际，他们妄图利用“千年虫”，破坏全球电脑，引起恐慌，从而达到统治全球网络的野心。警方奉命与其展开了正义与邪恶的较量，经过一场又一场惊心动魄的恶战，终将恶魔降服，全球顺利迎来新世纪曙光。正当人们欢欣鼓舞跨入新的世纪，黑客高手又丧心病狂地卷土重来，警方