By Hongfeng Wu, Rongquan Feng (auth.), Jingsheng Lei, Fu Lee Wang, Mo Li, Yuan Luo (eds.)
This ebook constitutes the complaints of the second one foreign convention on community Computing and knowledge safety, NCIS 2012, held in Shanghai, China, in December 2012. The 104 revised papers offered during this quantity have been conscientiously reviewed and chosen from 517 submissions. they're geared up in topical sections named: functions of cryptography; authentication and non-repudiation; cloud computing; conversation and data platforms; layout and research of cryptographic algorithms; details hiding and watermarking; clever networked structures; multimedia computing and intelligence; community and instant community safety; community conversation; parallel and disbursed structures; protection modeling and architectures; sensor community; sign and knowledge processing; virtualization suggestions and purposes; and instant network.
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Extra info for Network Computing and Information Security: Second International Conference, NCIS 2012, Shanghai, China, December 7-9, 2012. Proceedings
Access control limits the visitors and executable procedures operated, which is a key technology and the most effective means of database system security. Traditional database access control model can be divided into three categories: Discretionary Access Control(DAC),Mandatory Access Control (MAC) and Role-Based Access Control(RBAC). Traditional database access control model is to be regarded as coarse-grained access control, as well as that its authorized particle is the entire database table or view rather than tuples or elements.
2 IA-64 Bits Memory Model IA-64 bits memory is linear address space from 0 to 264-1. However, Intel CPU support less than 64-bit as physical address space through the paging mechanism. The IA-64 bit mode use flat virtual space for code, data, and OS kernel . User model virtual memory address space limits for supported 64-bit releases of Windows is 8T bytes With IMAGE_FILE_LARGE_ADDRESS_AWARE set. The limit on 64-bit win7 ultimate is 192GB, Windows Server 2008 R2 datacenter 2TB. IA-64 define 128 general integer registers from r0 to r127, 128 float point registers from f0 to f127, and 8 branch registers from b0 to b7 for function call linkage and return.
And summarized the Intel SYSRET privilege escalation procedure according to windows privilege rings structure, IA-32, IA-64 memory model, Intel IA-64 SYSCALL and SYSRET instructions. In the end we discussed CVE-2012-0217 vulnerability as SYSRET privilege escalation. Keywords: Privilege Escalation, vulnerability, CVE-2012-0217. 1 Introduction CVE-2012-0217 vulnerability is harmful to some 64-bit operating system and virtualization software. As the SYSCALL and SYSRET of AMD instruction are used in Intel CPU, the difference between AMD instruction system and Intel system, some program can escalate the user ring 3 privilege to system kernel ring 0 privilege.