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TMAC: Taint-Based Memory Protection via Access Control

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4 Author(s)
Lei Wang ; Dept. of Comput. Sci., Nanjing Univ., Nanjing, China ; Chen Fang ; Bing Mao ; Li Xie

Memory corruption attacks account for most parts of malicious attacks toward software security. Recently dynamic taint analysis is proposed and is gaining momentum. This proposed technique attempts to defeat attacks by checking the taintedness and integrity of pointers when accessing memory since vulnerabilities are always motivated by tainting pointers. Unfortunately, there exists some class of attacks without tainting pointers, such as array bounds violation attacks using pointers. In this paper, we propose a novel approach to defeat this kind of undetected attacks using taint-based tracking analysis. Our notion is based on the memory access control, that is, first, we will check the taintedness of the pointers when accessing memory like existing taint-based approaches, second, we will check whether or not the memory area is in the legitimate range of a pointer used to access this memory. Our implementation dose not need source code and is based on Valgrind, hence works on commodity software. To demonstrate our idea, we performed a preliminary empirical experiments, the results are quite promising: TMAC can effectively detect a wide range of attacks, and the average runtime overhead is close to Memcheck, a widely memory error detector.

Published in:

Dependability, 2009. DEPEND '09. Second International Conference on

Date of Conference:

18-23 June 2009

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