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 innovations and methods had to advance trustworthy and potent kernel-level exploits, and applies them to varied working structures, particularly, UNIX derivatives, Mac OS X, and home windows. options and strategies are provided categorically in order that even if a particularly unique vulnerability has been patched, the foundational info supplied may also help hackers in writing a more recent, greater assault; or support pen testers, auditors, and so on strengthen a extra concrete layout and protective constitution.
The publication is prepared into 4 components. half I introduces the kernel and units out the theoretical foundation on which to construct the remainder of the e-book. half II makes a speciality of diversified working platforms and describes exploits for them that focus on a variety of computer virus sessions. half III on distant kernel exploitation analyzes the consequences of the distant situation and provides new ideas to focus on distant concerns. It features 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. ultimately, half IV wraps up the research on kernel exploitation and appears at what the longer term may possibly hold.
- Covers a number working procedure households ― UNIX derivatives, Mac OS X, Windows
- Details universal situations resembling regular reminiscence corruption (stack overflow, heap overflow, etc.) matters, 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 winning thoughts, which will 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
To assume that this evolution does not bring new bugs. However, finding new vulnerabilities is not as prolific a task as it was 10 years ago. WARNING We focused our attention on software approaches to prevent exploitation, but some degree of protection can be achieved at the hardware level as well. For example, the x86-64 architecture (the 64-bit evolution of the x86 architecture) provides an NXB bit for physical pages. Modern kernels may take advantage of this bit to mark areas of the address space as nonexecutable, thereby reducing the number of places where an attacker can store shellcode.
Regardless of the language used to implement the software, the security issue will still be present). A classic example of a design flaw is to rely on a weak encryption scheme or to implicitly trust some component of the architecture that an attacker could impersonate or manipulate without the need for certain privileges. We provide a detailed example of a design flaw in the “Kernel-Generated User-Land Vulnerabilities” subsection later in this chapter. Of course, not all bugs are security bugs.
Of course, not all bugs are security bugs. In fact, bugs usually have nothing to do with security. Simply put, a bug becomes a security issue as soon as someone figures out how to gain privileges from it. Sometimes the approach used to exploit a specific bug can be generalized and reused on similar bugs. In these cases, we are referring to bug classes and exploiting techniques. The more precisely you can define and characterize these classes, the more accurate and reliable your exploiting techniques will be.
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