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Figure 1 is an example of a JOP attack. In this example, the attacker's aim is to execute a system call "int 0x80" to open a new command line window. To do this, an attacker needs to modify the contents of the eax register to "0x0000000b" and the ebx register to the string "/bin/sh" before "int 0x80" is called, and the ecx and edx registers must point to the value "0x00000000". Suppose the value "0x0000000" and the string "/bin/sh" can be found in memory when the program is running. An attacker needs to construct the value "0x0000000b" himself. However, for the value "0x0000000b", when an attacker saves data to the stack through a buffer overflow, the "0x00" byte will trigger the system to terminate the read operation. This example specifically describes how the attacker uses the existing code snippet in the program to modify the value of val pushed into the stack by the attacker step by step from "0xffffff0b" to the value required by the system call "0x0000000b", thus implementing JOP attack. The following are the detailed steps of the process.Construction of DatagramChannelImpl　　就当计划准备实施当天，妻子疑似遭人绑架。对方索要两亿日元赎金，否则将杀掉真理亚。看似老天帮助了幸平，然而接下来的事实却让他惊恐万分少了大梁和柱子，这些东西凑一块还能盖几间小一些的屋子。……第三，小李飞刀所属：李寻欢小李飞刀，长三寸七分，京城一个普通铁匠花了两个时辰打造而出，本身并无神奇之处。The socks inside are designed to be soft and thick, and with compressive performance, the feet feel very comfortable after wearing them.Sitemapxml Disclaimer and Website Agreement QQ Student Network