By Enrico Perla B.Sc. Computer Science University of Torino M.Sc. Computer Science Trinity College Dublin, Massimiliano Oldani
A advisor to Kernel Exploitation: Attacking the center discusses the theoretical concepts and methods had to advance trustworthy and powerful kernel-level exploits, and applies them to assorted working platforms, specifically, UNIX derivatives, Mac OS X, and home windows. recommendations and strategies are awarded categorically in order that even if a particularly distinct vulnerability has been patched, the foundational info supplied might help hackers in writing a more moderen, larger assault; or aid pen testers, auditors, and so forth improve a extra concrete layout and shielding constitution.
The publication is prepared into 4 elements. 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 varied working structures and describes exploits for them that focus on a variety of computer virus periods. half III on distant kernel exploitation analyzes the results of the distant state of affairs and provides new recommendations to focus on distant matters. It incorporates a step by step research of the improvement of a competent, one-shot, distant take advantage of for a true vulnerabilitya malicious program affecting the SCTP subsystem present in the Linux kernel. eventually, half IV wraps up the research on kernel exploitation and appears at what the longer term may perhaps hold.
- Covers quite a number working approach households ― UNIX derivatives, Mac OS X, Windows
- Details universal situations reminiscent of normal 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 concentrate on the stairs that result in the production of profitable thoughts, in an effort to provide to the reader anything greater than only a set of tricks
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Additional resources for A Guide to Kernel Exploitation: Attacking the Core
Mac OS X Internals (Addison-Wesley Professional). , with Ionescu, A. 2009. Microsoft Windows Internals, Fifth Edition (Microsoft Press). , and McDougall, R. 2006. Solaris Internals, Second Edition (Prentice Hall PTR). Endnote 1. Solar Designer. Getting around non-executable stack (and fix). 10]. a. the Bug Grab Bag) INTRODUCTION Software has bugs. A bug is a malfunction in a program that makes the program produce incorrect results, behave in an undesired way, or simply crash/terminate unexpectedly.
All of these debugging options have an impact on operating system performance and are thus turned off by default. They can usually be enabled either at runtime (by setting a boot flag or modifying a value via a kernel debugger) or at compile time (via compile options). ) 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.
An Exploit Writer’s View of the Kernel We just briefly explained what “having a backing process” implies: that a lot of process-specific information is available and ready to be used by the kernel path without having to explicitly load or look for it. This means a variable that holds this information relative to the current process is kept inside the kernel and is changed anytime a process is scheduled on the CPU. A large number of kernel functions consume this variable, thereby acting based on the information associated to the backing process.