A Guide to Kernel Exploitation: Attacking the Core - download pdf or read online

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

ISBN-10: 1597494860

ISBN-13: 9781597494861

A advisor to Kernel Exploitation: Attacking the center discusses the theoretical recommendations and techniques had to improve trustworthy and potent kernel-level exploits, and applies them to varied working structures, particularly, UNIX derivatives, Mac OS X, and home windows. techniques and strategies are awarded categorically in order that even if a particularly targeted vulnerability has been patched, the foundational info supplied can help hackers in writing a more recent, greater assault; or support pen testers, auditors, etc boost a extra concrete layout and protecting constitution.
The e-book is geared up into 4 elements. half I introduces the kernel and units out the theoretical foundation on which to construct the remainder of the publication. half II specializes in varied working platforms and describes exploits for them that concentrate on numerous computer virus periods. half III on distant kernel exploitation analyzes the consequences of the distant situation and provides new strategies to focus on distant concerns. It contains a step by step research of the improvement of a competent, one-shot, distant make the most for a true vulnerabilitya malicious program 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 might hold.

  • Covers more than a few working procedure households ― UNIX derivatives, Mac OS X, Windows
  • Details universal situations equivalent to usual reminiscence corruption (stack overflow, heap overflow, etc.) concerns, logical insects and race conditions
  • Delivers the reader from user-land exploitation to the area of kernel-land (OS) exploits/attacks, with a selected specialise in the stairs that bring about the construction of profitable recommendations, that allows you 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

Sample text

A nonvalidated pointer issue makes the most sense in a combined user and kernel address space. As we said in Chapter 1, in such an architecture the kernel sits on top of user land and its page tables are replicated inside the page tables of all processes. Some virtual address is chosen as the limit address: this means virtual addresses above (or below) it belong to the kernel, and virtual addresses below (or above) it belong to the user process. Internal kernel functions use this address to decide if a specific pointer points to kernel land or user land.

NOTE At the time of this writing, virtualization systems are becoming increasingly popular, and it will not be long before we see virtualization-based kernel protections. The performance penalty discussion also applies to this kind of protection. Virtualization systems must not greatly affect the protected kernel if they want to be widely adopted. Moreover, it is interesting to note that one of the drawbacks of some of the protections we described is that they introduce a performance penalty. Although this penalty may be negligible on some user-land applications, it has a much higher impact if it is applied to the kernel (and, consequently, to the whole system).

Or employ them along with fuzzing to have a better understanding of the kinds of bugs we hit. INTEGER ISSUES Integer issues affect the way integers are manipulated and used. The two most common classes for integer-related bugs are (arithmetic) integer overflows and sign conversion issues. In our earlier discussion about data models, we mentioned that integers, like other variables, have a specific size which determines the range of values that can be expressed by and stored in them. Integers can also be signed, representing both positive and negative numbers, or unsigned, representing only positive numbers.

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A Guide to Kernel Exploitation: Attacking the Core by Enrico Perla B.Sc. Computer Science University of Torino M.Sc. Computer Science Trinity College Dublin, Massimiliano Oldani

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