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Embedded systems hardware anti- buffer overflow attacks defense mechanism

Author: WanZuoXi
Tutor: LiuZhengLin
School: Huazhong University of Science and Technology
Course: Microelectronics and Solid State Electronics
Keywords: Embedded Systems Buffer overflow attacks Hardware defense Virtual execution unit
CLC: TP393.08
Type: Master's thesis
Year: 2011
Downloads: 20
Quote: 0
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Abstract


With the wide application of embedded systems , embedded system security and more important, as the most common buffer overflow vulnerabilities in embedded systems software poses a serious security threat . Embedded systems in order to improve the defense capabilities of buffer overflow attacks , this paper embedded processor architecture level instruction stream is proposed based on fine-grained monitoring hardware defense mechanism. This paper analyzes and compares the existing detection techniques , buffer overflow attacks by the behavior of instruction-level study to determine the processor architecture to construct a granular -based instruction stream monitoring hardware defense mechanism. Monitoring unit in the cache and pipeline data path interception instruction stream , through virtual virtual execution units execute instructions in the instruction stream fetch buffer boundary address and other monitoring information . Based on this information, the attacker acts perform buffer bounds checking , stack border checks , return address protection and jump instructions check in the process buffer overflow attacks to intercept attacking key nodes , enhance system security during the operation . Functional simulation of the design and FPGA verification, monitoring unit can effectively defend against buffer overflow attacks. Use the ISE tools to evaluate the design, monitoring unit brings a 15% hardware overhead and 0.1 % performance loss. The main feature is that through the establishment of a virtual execution units to obtain monitoring information , without modifying the program , does not destroy the integrity of the pipeline , and the virtual execution units and pipelined synchronous processing instructions , hidden surveillance processing time , little impact on system performance , this paper protection mechanism can be applied to other embedded system design dynamic defense buffer overflow attacks.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Computer Network Security
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