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RISS 인기검색어
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- 저자 : ( Qixu Liu ) (검색결과 2 건)
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RPFuzzer: A Framework for Discovering Router Protocols Vulnerabilities Based on Fuzzing
( Zhiqiang Wang ),( Yuqing Zhang ),( Qixu Liu ) 한국인터넷정보학회 2013 KSII Transactions on Internet and Information Syst Vol.7 No.8
How to discover router vulnerabilities effectively and automatically is a critical problem to ensure network and information security. Previous research on router security is mostly about the technology of exploiting known flaws of routers. Fuzzing is a famous automated vulnerability finding technology; however, traditional Fuzzing tools are designed for testing network applications or other software. These tools are not or partly not suitable for testing routers. This paper designs a framework of discovering router protocol vulnerabilities, and proposes a mathematical model Two-stage Fuzzing Test Cases Generator(TFTCG) that improves previous methods to generate test cases. We have developed a tool called RPFuzzer based on TFTCG. RPFuzzer monitors routers by sending normal packets, keeping watch on CPU utilization and checking system logs, which can detect DoS, router reboot and so on. RPFuzzer` debugger based on modified Dynamips, which can record register values when an exception occurs. Finally, we experiment on the SNMP protocol, find 8 vulnerabilities, of which there are five unreleased vulnerabilities. The experiment has proved the effectiveness of RPFuzzer.
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Large-scale microwave-assisted ring-opening polymerization of e-caprolactone
Qi Xu,Chuanjie Zhang,Shaojun Cai,Lijian Liu,Ping Zhu 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.5
To probe into the industrialization possibility of microwave-assisted ring-opening polymerization (ROP)of e-caprolactone (e-CL), it was performed with monomer mass from 750 to 2450 g using a self-designed industrial microwave oven (6000W) catalyzed by stannous octanoate (Sn(Oct)2) (M/Cat = 1000). The large-scale ROP of e-CL proceeded smoothly at various microwave power levels (850, 1700, and 2550 W)and produced poly(e-caprolactone) (PCL) with weight-average molar mass (Mw) from 66,000 to 12,2000 g/mol within 40 min in a yield over 93%. The structure of PCL was characterized by 1H and 13C NMR, FT-IR, DSC and WAXD. We propose that the microwave ROP of e-CL is a potential technology to prepare PCL commercially. 2010 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry.
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