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Research and Implementation of the buffer overflow protection method based memory segment to protect critical data

Author: XieDi
Tutor: LiYiChao
School: University of Electronic Science and Technology
Course: Applied Computer Technology
Keywords: Overflow protection Memory fragmentation The process of critical data Exception Handling
CLC: TP393.08
Type: Master's thesis
Year: 2011
Downloads: 46
Quote: 1
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Abstract

With buffer overflow technology continues to evolve, the species from a simple stack overflow, derived heap integer format string different ways, endangering speed appear to take advantage of the development from the early years of a few months before to 0 Day today utilize hazards The degree of increase, network and personal information security is facing a huge threat. Buffer overflow protection technologies emerging in recent years, such as unenforceable processor-based hardware buffer overflow protective effect function linked stack traceback technology can play to some extent, but still has been found to bypass method. So, the market is an urgent need for a new overflow protection technologies and development appropriate to achieve effective protection against buffer overflow attacks. This article is based a classification characterized buffer overflow overflow occurs after malicious code execution behavior as well as existing buffer overflow protection technology advantages and disadvantages, and propose a new method based on the process of memory segmentation mechanisms to protect critical data buffer overflow protection. Segmented memory feature, this protection method utilizes the x86 hardware platform manufacturing inaccessible memory address space of the the win32 process of transfer of critical data to these inaccessible space, and access to critical data intercepted abnormal, and thus the buffer overflow detection protection, and the formation of the log statements. I Research and Implementation of the above buffer overflow, completed work include: study the classification of buffer overflow attacks and characteristics, the analysis of the strengths and weaknesses of the existing buffer overflow protection technology, on the basis of the first two studies The design is based on memory segmentation to protect critical data buffer overflow protection method based the memory segmentation protect critical data buffer overflow protection system. Based memory segmentation to protect critical data buffer overflow protection method and implementation of the system, has been tested in a buffer overflow already occurred, the effective detection of various types of buffer overflow and prevent malicious code to capture the system control right to further analysis and further implementation, and a detailed report of the circumstances and the overflow log for user reference. Based memory segmentation to protect critical data buffer overflow protection system is lower than the efficiency overhead paging overflow protection, on the scope of protection than the existing the stack traceback technologies such function linked for the computer network and personal system provides an efficient, the extensive buffer overflow protection.

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