国产乱码精品一区二区三区麻豆

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.Obvious advantages of offline mechanisms:这是一个充满浓情蜜意，而又空灵无比、古怪谐趣的仙凡爱情故事。章邯虽然治军严谨，但这支秦军出自骊山囚徒，皆是亡命之徒，本性难改。盲女叶轻如意外怀了真龙河神之子。她本是最平凡的存在，却偶然与河神相恋…90年代同名儿童剧的重启作，讲述一个在小型书店的鬼魂把书中的虚构人物释放到现实世界时，四个孩子因此组合起来为鬼魂解决各种未了之事。Singleton: Guarantees that a class has only one instance and provides a global access point to access it.