The Shellcoder's Handbook: Discovering and Exploiting by Chris Anley, John Heasman, Felix Lindner, Gerardo Richarte PDF

By Chris Anley, John Heasman, Felix Lindner, Gerardo Richarte

ISBN-10: 047008023X

ISBN-13: 9780470080238

* This much-anticipated revision, written through the last word staff of most sensible safeguard specialists on the planet, positive factors forty percentage new content material on how to define safeguard holes in any working procedure or program * New fabric addresses the various new exploitation concepts which have been found because the first version, together with attacking "unbreakable" software program applications equivalent to McAfee's Entercept, Mac OS X, XP, place of work 2003, and Vista * additionally beneficial properties the first-ever released details on exploiting Cisco's IOS, with content material that hasn't ever ahead of been explored * The significant other site good points downloadable code records

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Additional resources for The Shellcoder's Handbook: Discovering and Exploiting Security Holes (2nd Edition)

Example text

By nature, all the functions in the library are shared (this is the definition of a function library), meaning that any program that includes libc will have access to these functions. You can see where this is going—if any program can access these common functions, why couldn’t one of our exploits? All we have to do is direct execution to the address of the library function we want to use (with the proper arguments to the function, of course), and it will be executed. For our Return to libc exploit, let’s keep it simple at first and spawn a shell.

More code . . qxd:WileyRed 8 Part I 7/11/07 ■ 7:24 AM Page 8 Introduction to Exploitation: Linux on x86 This could be translated to, in assembly: number dw 0 . more code . . mov eax,number inc eax mov number,eax We use the Define Word (DW) instruction to define a value for our integer, number. Next we put the value into the EAX register, increment the value in the EAX register by one, and then move this value back into the number integer. Look at a simple if statement in C++: int number; if (number<0) { .

Memory Management To use this book, you will need to understand modern memory management, specifically for the Intel Architecture, 32 Bit (IA32). Linux on IA32 is covered exclusively in the first section of this book and used in the introductory chapters. You will need to understand how memory is managed, because most security holes described in this book come from overwriting or overflowing one portion of memory into another. INSTRUCTIONS AND DATA A modern computer makes no real distinction between instructions and data.

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The Shellcoder's Handbook: Discovering and Exploiting Security Holes (2nd Edition) by Chris Anley, John Heasman, Felix Lindner, Gerardo Richarte


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