Memory protection
Buffer overrun attacks are among the most common mechanisms, or vectors, for intrusion into computers. In this type of exploit, the attacker sends a long string to an input stream or control – longer than the memory buffer allocated to hold it. The long string injects code into the system, which is executed, launching a virus or worm.
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The capabilities of seven dynamic buffer overflow detection tools (Chaperon, Valgrind, CCured, CRED, Insure++, ProPolice and TinyCC) are evaluated in this paper. These tools employ different approaches to runtime buffer overflow detection and range from commercial products to opensource gcc-enhancements. A comprehensive testsuite was developed consisting of speci?cally-designed test cases and model programs containing real-world vulnerabilities.
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Despite previous efforts in auditing software manually and automatically, buffer overruns are still being discovered in programs in use. A dynamic bounds checker detects buffer overruns in erroneous software before it occurs and thereby prevents attacks from corrupting the integrity of the system. Dynamic buffer overrun detectors have not been adopted widely because they either (1) cannot guard against all buffer overrun attacks (2) break existing code or (3) incur too high an overhead. This paper presents a practical detector called CRED (C Range Error Detector) that avoids each of these defeciencies.
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This Quadro™4 XGL Series Performance Guide contains essential information to assist you in the review of the Quadro 4 XGL series of professional graphics solutions. Included are important hardware optimizations, review tips, benchmark settings and other miscellaneous “gotchas” found while testing and benchmarking. Here’s a quick list of what we’ll be reviewing: General Benchmark Reminders NVIDIA’s Unified Driver Architecture (UDA) Test with Windows XP Recommended Benchmarking Applications Testing NVIDIA nView Multi-display Technology Sample Benchmark Data While benchmarking, we’ve encountered a number of issues that you should be aware of.
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