Network Security Coding

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Introduction
memory, stack and functions, shellcode
Buffer overflows

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Network Security Coding

Konten Training

Introduction
Privileges
Type of attacks and potential targets
Changing privilege levels
Running external commands
Dangers of the system() function
Solutions
Indirect execution of commands
Conclusion

Introduction
The different areas
Detailed example
The stack and the heap
The registers
The functions
The prolog
The call
The Return
Disassembling
Creating a shellcode
With C language
Assembly calls
Locating the shellcode within memory
The null bytes problem
Building the shellcode
Generalization and last details
Conclusion

Introduction
Position in memory
Launch program
shell(s) problems
Prevention
Checking indexes
Using n functions
Validating the data in two steps
Using dynamic buffers
Conclusion

Deskripsi

A network is a collection of computers and other devices that can send data to and receive data from one another, more or less in real time. A network is often connected by wires, and the bits of data are turned into electromagnetic waves that move through the wires. However, wireless networks transmit data using radio waves; and most longdistance transmissions are now carried over fiber-optic cables that send light waves through glass filaments.

A network program is any application that uses a computer network to transfer information to and from other applications. All of these pieces of software share the ability to communicate with other computers, and in so doing, become more useful to the end-user and secure. Users generally trust network applications; therefore, these programs have much greater control over the computers on which they are running than a Web site has over the computers viewing it.