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It should be noted that: 1. Attackers often choose systems based on UDP protocol, because UDP protocol is unreliable and can forge source IP; 2. Attackers often choose services whose response packets are larger than the request packets. Based on this, the services that are generally attacked include DNS service, Memcached service, etc.好嘞。Therefore, judging from the age, the name Stephen appeared early. PH changed to V (there is no letter V in Greek, and the one that looks like V is actually N), which is a later evolution and is mainly used in Denmark and Holland in Northern Europe.MyHandler h3 = new MyHandler ("h3");来吧，问吧，有什么我说什么。剧情聚焦军旅中的“人犬情”，围绕一群军旅战士和他们骁勇善战的军犬而展开，既有同类影视作品中血气方刚的烈性，也有柔情动人的细腻情感，更有令人忍俊不禁的喜感。 一次危险的边境伏击，将养猪班长郭油子和四只小野狗送进了塞外的军犬收养连。小野狗“步枪”、“小米”、“沧海”和“滔滔”在艰苦卓绝的环境中克服种种困难，出色地完成了各种任务，却因为有狼性血统而无法获得军犬资格，险些被送进动物园，幸好某军犬基地及时发出调令，拯救了四犬。在军犬基地接受正规训练后，“步枪”等犬终于成为优秀军犬，在各类危险任务中屡建功勋，最终代表中国军犬参加世界军犬锦标赛，过关斩将加冕“犬王”。在一次任务中，“步枪”为救战友堕入悬崖，一年后，训导员们带着新繁育出的小犬们在“步枪”的坠崖处宣誓——永远守护祖国的疆土。We know that in x64, the first six parameters of the function are stored in RDI, RSI, RDX, RCX, R8 and R9 registers in turn. If there are more parameters, they will be stored on the stack. Therefore, in order for the computer to run the commands we want, we need to find a way to put the address of "/bin/sh" into RDI so that the machine can execute the system function. After carefully examining the linux function stack structure, we can find that we can use RAX register to put the system () address into RAX, then look for code fragments with JMP rax to make use of, and at the same time use RDI register to pass the parameter "/bin/sh" to finally achieve the attack purpose.