香港三级

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.只不过在命运的指引下，毛伊还是随着莫阿娜踏上未知的征途……籍儿，你怎么来了？范增抬头只见进来一个青年男子，身长八尺，孔武有力，浑身散发出一股强烈的气势，有种不可略其锋芒的感觉。If you have few contacts, you can only rely on your own little perseverance. After locating the target customer, we must introduce the advantages of the product to the customer over and over again, and explain the advantages of the product over and over again. Only by sticking to it can we reach cooperation with the customers who really need it and find the target customer.殿试中，苏文青一举夺魁。这个作者是天启。