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NEW QUESTION: 1
Highly sensitive data is stored in a database and is accessed by an application on a DMZ server. The disk drives on all servers are fully encrypted. Communication between the application server and end-users is also encrypted. Network
ACLs prevent any connections to the database server except from the application server. Which of the following can still result in exposure of the sensitive data in the database server?
A. Cookies
B. SQL Injection
C. Theft of the physical database server
D. Cross-site scripting
Answer: B
Explanation:
The question discusses a very secure environment with disk and transport level encryption and access control lists restricting access. SQL data in a database is accessed by SQL queries from an application on the application server. The data can still be compromised by a SQL injection attack.
SQL injection is a code injection technique, used to attack data-driven applications, in which malicious SQL statements are inserted into an entry field for execution (e.g. to dump the database contents to the attacker). SQL injection must exploit a security vulnerability in an application's software, for example, when user input is either incorrectly filtered for string literal escape characters embedded in SQL statements or user input is not strongly typed and unexpectedly executed. SQL injection is mostly known as an attack vector for websites but can be used to attack any type of SQL database.
Incorrect Answers:
B. Theft of the physical database server would not expose the sensitive data in the database server because the disks are encrypted. You would need the certificate used to encrypt the data in order to decrypt the data on the disks.
C. Cookies are text files stored on a user's computer to store website information. This is to provide the user with a consistent website browsing experience. Cookies do not pose a risk to the sensitive data on the database server.
D. Cross-site scripting (XSS) is a type of computer security vulnerability typically found in Web applications. XSS enables attackers to inject client-side script into Web pages viewed by other users.
Cross-site scripting uses known vulnerabilities in web-based applications, their servers, or plug-in systems on which they rely. Exploiting one of these, attackers fold malicious content into the content being delivered from the compromised site. When the resulting combined content arrives at the client-side web browser, it has all been delivered from the trusted source, and thus operates under the permissions granted to that system. By finding ways of injecting malicious scripts into web pages, an attacker can gain elevated access-privileges to sensitive page content, session cookies, and a variety of other information maintained by the browser on behalf of the user.
The sensitive data is stored in databases on the database server. It is therefore not vulnerable to an XSS attack.
References:
http://en.wikipedia.org/wiki/SQL_injection
http://en.wikipedia.org/wiki/Cross-site_scripting
NEW QUESTION: 2
You create a table with the PERIOD FOR clause to enable the use of the Temporal Validity feature of
Oracle Database 12c.
Examine the table definition:
Which three statements are true concerning the use of the Valid Time Temporal feature for the
EMPLOYEES table? (Choose three.)
A. Setting the session valid time using DBMS_FLASHBACK_ARCHIVE.ENABLE_AT_VALID_TIME sets
the visibility for data manipulation language (DML), data definition language (DDL), and queries
performed by the session.
B. The same statement may filter on both transaction time and valid temporal time by using the AS OF
TIMESTAMP and PERIOD FOR clauses.
C. The valid time columns are visible by default when the table is described.
D. The valid time columns are not populated by the Oracle Server automatically.
E. The valid time columns employee_time_start and employee_time_end are automatically created.
Answer: B,D,E
NEW QUESTION: 3
An engineer is working on a design solution for a large hub-and-spoke EIGRP network. Which feature helps to make this design more stable while also reducing resource utilization?
A. stub routing
B. QoS
C. network summarization
D. route filtering
Answer: A
Explanation:
Reference: https://www.cisco.com/en/US/technologies/tk648/tk365/
technologies_white_paper0900aecd8023df6f.html