By Enrico Perla, Massimiliano Oldani
The variety of safety countermeasures opposed to user-land exploitation is at the upward push. due to this, kernel exploitation is changing into even more renowned between take advantage of writers and attackers. fiddling with the center of the working procedure could be a harmful video game: This ebook covers the theoretical thoughts and methods had to increase trustworthy and potent kernel-level exploits and applies them to assorted working structures (Linux, Solaris, Mac OS X, and Windows). Kernel exploits require either paintings and technological know-how to accomplish. each OS has its quirks and so each take advantage of has to be molded to totally take advantage of its aim. This e-book discusses the most well-liked OS families-UNIX derivatives, Mac OS X, and Windows-and the right way to achieve whole keep watch over over them. ideas and strategies are awarded categorically in order that even if a particularly specified take advantage of has been patched, the foundational details that you've got learn might help you to write down a more moderen, larger assault or a extra concrete layout and protecting structure.
* Covers a number of working method households - UNIX derivatives, Mac OS X, Windows
* info universal eventualities equivalent to everyday reminiscence corruption (stack overflow, heap overflow, etc.) matters, logical insects and race conditions
* provides the reader from user-land exploitation to the area of kernel-land (OS) exploits/attacks, with a selected specialize in the stairs that result in the construction of profitable thoughts, on the way to supply to the reader whatever greater than only a set of tricks
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Extra info for A Guide to Kernel Exploitation: Attacking the Core
Now, let’s consider two threads that share a common VM GROWSDOWN area that is limited, for example, at 0x104000, and that enter into this path at the same time. a. A. THE BUG GRAB BAG) Logic bugs are a pretty large class of bugs and they are complicated to model. In fact, some people would argue that, typos excluded, all bugs can be defined logically. A less extreme point of view would at least include race conditions as a subtype of logic bugs. We agree with that point of view, but due to the importance of race conditions, we gave them their own section.
Via proof-of-concept code) is only a first step in kernel exploitation. The exploit has to work. A piece of code that gives you full privileges and then immediately panics the machine is clearly of no use. To develop a good exploit, you must understand the vulnerability you are targeting, the kernel subsystems involved, and the techniques you are using.
This is usually achieved through device drivers. Supporting a large number of devices is a goal for an operating system that aims to be successful. a. the Bug Grab Bag) the large number of external, portable, and pluggable devices that are available today. One technology that has greatly simplified the life of desktop users is Plug and Play or hotplug technology (which means a device can be attached at any time during the lifetime of the machine and it will be activated), accompanied by auto-detection (the device will be recognized, the proper driver will be loaded, and it will be “automagically” usable immediately).