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 center discusses the theoretical recommendations and techniques had to improve trustworthy and powerful kernel-level exploits, and applies them to diversified working platforms, particularly, UNIX derivatives, Mac OS X, and home windows. options and strategies are offered categorically in order that even if a in particular designated vulnerability has been patched, the foundational details supplied can help hackers in writing a more recent, higher assault; or aid pen testers, auditors, and so forth improve a extra concrete layout and shielding constitution.
The ebook is equipped into 4 elements. half I introduces the kernel and units out the theoretical foundation on which to construct the remainder of the booklet. half II specializes in diversified working structures and describes exploits for them that focus on numerous computer virus sessions. half III on distant kernel exploitation analyzes the results of the distant situation and offers new options to focus on distant matters. It contains a step by step research of the advance of a competent, one-shot, distant take advantage of 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 longer term may perhaps hold.
- Covers a number working process households ― UNIX derivatives, Mac OS X, Windows
- Details universal eventualities corresponding to primary 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 specific concentrate on the stairs that result in the production of winning ideas, to be able 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
Sit down and relax. The journey has just begun. AN EXPLOIT WRITER’S VIEW OF THE KERNEL In the preceding section, we outlined the differences between user-land and kernel-land exploitation; from this point on we will focus only on the kernel. In this section, we will go slightly deeper into some theoretical concepts that will be extremely useful to understand; later we will discuss kernel vulnerabilities and attacks. Since this is not a book on operating systems, we decided to introduce the exploitation concepts before this section in the hopes that the exploitationrelevant details will more clearly stand out.
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. With n representing the size of an integer in bits, logically up to 2n values can be represented.
Other UNIX derivates are (fully or mostly) open source as well, with different (and, usually, more relaxed) licenses: FreeBSD, OpenBSD, NetBSD, OpenSolaris, and, even though it’s a hybrid kernel, Mac OS X let you dig into all or the vast majority of their kernel source code base. On the other side of the fence there is the Microsoft Windows family and some commercial UNIX derivates, such as IBM AIX and HP-UX. Having the source code available helps the exploit developer, who can more quickly understand the internals of the subsystem/kernel he or she is targeting and more easily search for exploitation vectors.