Download Data and Applications Security XXIII: 23rd Annual IFIP WG by Joachim Biskup, Jens Seiler, Torben Weibert (auth.), Ehud PDF

By Joachim Biskup, Jens Seiler, Torben Weibert (auth.), Ehud Gudes, Jaideep Vaidya (eds.)

This booklet constitutes the refereed lawsuits of the 23nd Annual IFIP WG 11.3 operating convention on facts and purposes safeguard held in Montreal, Canada, in July 2009.

The 18 revised complete papers and four brief papers have been conscientiously reviewed and chosen from forty seven submissions. The papers are geared up in topical sections on database protection; defense guidelines; privateness; intrusion detection and protocols; and relied on computing.

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Sample text

Asset For example, mis-configured NAC configurations have the potential to expose both internal servers and NAC ’s alike to threats. The following fragment in the ontology states that the webServer is susceptible to a synFlood attack via the weakness tcpHandshake. V ulnerability(tcpHandshake) ← isExploitedBy(tcpHandshake, synFlood) isW eaknessOf (tcpHandshake, webServer) Countermeasure. A countermeasure is an action or process that mitigates vulnerabilities and prevents and/or reduces threats. V ulnerability Countermeasures can be further sub-classed into specific concepts, if desired.

On individual basis both cntrwebT raf f icGen and cntrsshT unnelDBGen may appear as minor oversights in their respective tiers, however it is their conjunction that provides indirect and unacceptable access from the Web server to the database. The dataNAC firewall inadequately mitigates the threat threattier1 (outlined in Table 1), as countermeasure cntrsshT ier1Gen directly permits SSH access from all tier-1 systems to the database. Perhaps remote database administration is a requirement through an SSH proxy server in the DMZ.

The semi-formal nature of a threat tree means that, in practice, any reasoning must be done outside of the tree structure [4]. For example, it would be useful to reason whether the concept of ‘Denial of Service’ has the same meaning in both trees of Figure 1. Tree Key Disrupt Web Server solid-line: threats dashed-line: countermeasures Denial of Service Syn-Flood Attack Other Other DoS Exploit TCP 3-way Handshake Syn-Cookie Firewall-1 Syn-Proxy-1 Syn-Threshold-1A (a) Partial Threat Tree: Web Server Syn-Flood DoS Attack Disrupt Firewall-1 Denial of Service Syn-Flood Attack Poor Admin Other DoS Exploit TCP 3-way Handshake Syn-Threshold-1B Firewall-2 Syn-Threshold-2A Syn-Proxy-2 Bogon Blacklist (b) Partial Threat Tree: Firewall Syn-Flood DoS Attack Fig.

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