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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.
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2. In addition, you can also use flow cards to surf the Internet, such as wireless network cards with mobile phone cards. When flow is turned on, you can also connect on a tablet computer.
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10. Department Responsibilities, Job Descriptions and Work Flow Chart: Department Responsibilities shall be set by the Administrative Director within a time limit and revised by each department manager. The responsibilities, job descriptions and work flow charts of each post shall be set by the administrative personnel department within a time limit, and the personnel of each post shall draft them by themselves. The heads of each department shall collect and review the manuscripts and submit them to the administrative personnel department. The Company has set up a unified construction team for department responsibilities and job descriptions. The administrative and personnel department will conduct preliminary examination, review and final examination together with the team, and report to the board of directors of the Company for approval, filing, distribution and implementation.
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