Download A Guide to Kernel Exploitation: Attacking the Core by Enrico Perla B.Sc. Computer Science University of Torino PDF

By Enrico Perla B.Sc. Computer Science University of Torino M.Sc. Computer Science Trinity College Dublin, Massimiliano Oldani

A consultant to Kernel Exploitation: Attacking the middle discusses the theoretical ideas and ways had to strengthen trustworthy and powerful kernel-level exploits, and applies them to diverse working platforms, specifically, UNIX derivatives, Mac OS X, and home windows. recommendations and strategies are awarded categorically in order that even if a in particular distinct vulnerability has been patched, the foundational details supplied can help hackers in writing a more moderen, higher assault; or support pen testers, auditors, and so forth increase a extra concrete layout and protecting constitution.
The booklet is geared up into 4 components. half I introduces the kernel and units out the theoretical foundation on which to construct the remainder of the ebook. half II makes a speciality of diversified working platforms and describes exploits for them that concentrate on a variety of computer virus periods. half III on distant kernel exploitation analyzes the consequences of the distant situation and provides new thoughts to focus on distant matters. It incorporates a step by step research of the advance of a competent, one-shot, distant make the most for a true vulnerabilitya trojan horse affecting the SCTP subsystem present in the Linux kernel. ultimately, half IV wraps up the research on kernel exploitation and appears at what the long run could hold.

  • Covers quite a number working approach households ― UNIX derivatives, Mac OS X, Windows
  • Details universal situations akin to common reminiscence corruption (stack overflow, heap overflow, etc.) matters, logical insects and race conditions
  • Delivers the reader from user-land exploitation to the realm of kernel-land (OS) exploits/attacks, with a selected specialise in the stairs that bring about the production of profitable ideas, in an effort to provide to the reader anything greater than only a set of tricks

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Extra info for A Guide to Kernel Exploitation: Attacking the Core

Example text

This is a godsend when the code to trigger the vulnerability messes up many kernel structures, thereby necessitating a careful recovery phase. You do not have to face the problem of finding a large, safe place to store the shellcode. You have 3GB of controlled address space. You do not have to worry about no-exec page protection. Since you control the address space, you can map it in memory however you like. You can map in memory a large portion of the address space and fill it with NOPs or NOP-like code/data, sensibly increasing your chances of success.

A lot of integer issues have been detected in basically all the modern kernels, and that makes them a pretty interesting (and, indeed, rewarding) bug class. (Arithmetic) Integer Overflows An integer overflow occurs when you attempt to store inside an integer variable a value that is larger than the maximum value the variable can hold. The C standard defines this situation as undefined behavior (meaning that anything might happen). In practice, this usually translates to a wrap of the value if an unsigned integer was used and a change of the sign and value if a signed integer was used.

Whenever such objects receive a specific cache, the size of the chunks will likely reflect the specific object size; as a result, non-power-of-two sizes will be used to optimize space. In this case, as well as in the case of in-cache metadata information, the free space available for chunks might not be divisible by the chunk size. This “empty” space is used, in some implementations, to color the cache, making the objects in different pages start at different offsets and, thus, end on different hardware cache lines (again improving overall performance).

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