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Apple Fixes Serious Flaw In AirPort Wireless Routers

The Flaw Could Allow Hackers To Execute Malicious Code On Affected Devices

Apple has released firmware updates for its AirPort wireless base stations to address a security vulnerability that could expose devices to piracy.

Apple's security is a memory corruption issue that results from the analysis of Domain Name System (DNS) data that could lead to the execution of arbitrary code.

The company releases firmware updates 7.6.7 and 7.7.7 for AirPort Express, AirPort Extreme and AirPort Time Capsule Base Stations with Wi-Fi 802.11n, and AirPort Extreme and AirPort Time Capsule Base Stations with Wi-Fi 802.11ac.

The AirPort Utility 6.3.1 or later on OS X or AirPort Utility 1.3.1 or later on iOS can be used to install new firmware versions on AirPort devices, the company said.

As is common with Apple's security announcements, the company has not published details on possible exploitation scenarios and has not assigned a severity rating to the error. However, the "execution of arbitrary code", especially by a remote vector such as DNS, is as bad as it could possibly be for a vulnerability.

What is not clear is whether the problem of data analysis lies in the DNS server or in the DNS client functionality.

A router like AirPort can act as a local DNS resolution for devices on a network. This means that it receives DNS queries from computers and forwards those queries over the global Internet DNS chain.

On the other hand, routers also act as DNS clients and require other DNS servers on the Internet to resolve hostnames.

If the error occurs in the analysis of the queries received from the LAN computers, this would limit the attack on the local network. However, if the error lies in the analysis of DNS responses, it could be exploited remotely.

When a DNS client asks a server to resolve a domain name, the query is finally passed to one of the 13 root DNS servers on the Internet, in fact server clusters. These servers specify the authorized DNS server for the consulted domain name, and that authorized server responds with the requested information.

Attackers can register dishonest domain names and configure the authorized DNS server to respond with specially designed data that exploits the error. Then they would have to outsmart a computer behind an AirPort router to send a DNS query for one of their domain names, for example, by getting a user to click on a link.

Another unknown fact is the privilege with which an attacker can execute malicious code if this error is successfully misused. Running the code under the root account may endanger the device.

By operating an AirPort device, attackers can perform multiple attacks on computers on the local network. They can hijack search queries, add fraudulent ads to websites and even refer users to malicious websites when they try to access legitimate sites.

Given the potentially serious consequences of this vulnerability and the fact that DNS is a critical service that can not be easily disabled, it is recommended that users install the updated firmware as soon as possible.

Microsoft Preps Windows Server 2016 For The Container Age

The Next Technical Preview Of Server 2016 Will Offer Full Support For Linux And Windows Containers 

With the next release of Windows Server, Microsoft will equip its enterprise customers to take advantage of the container revolution.

The next preview release of Windows Server 2016, due by the middle of the year, will offer the first glimpse into how its container system will operate. Microsoft is demonstrating these new container technologies at its Ignite conference for IT professionals, held this week in Chicago.

"One of the big trends we're seeing is the notion of microservices and containers," explained Mike Schutz, Microsoft general manager of product marketing for servers and tools. "It provides a lot of flexibility for how you deploy" your applications, he said.

Although container technologies have been around for decades, they gained immensely in popularity over the past year or so with the release of the Docker open source container software.

Developers and administrators can package applications and components within containers so they can be easily moved around across different servers. Unlike a full virtual machine, which comes with its own OS, containers rely on the OS of its host server, which both makes them both lighter and faster to deploy than full virtual machines.

In particular, the growth of large-scale Internet services, which need to be scaled up or down to meet variable usage demands, has been a big driver in container use, Schutz said. Both Microsoft and Google have used containers in their cloud operations for years. Containers also speed the development cycle, Schutz explained. A developer can build an application on a laptop, then quickly move it to testing and then to production servers or the cloud for deployment. With Windows Server 2016, Microsoft is preparing the groundwork for easy use of containers by businesses.


The OS will support Docker-based containers, which will run on a Linux kernel running on a Hyper-V virtual machine. It will also support Microsoft's recently announced Windows Hyper-V Containers, which can run directly on the server's own Windows OS.

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Question No : 1

You have a server named Server1 that runs Windows Server 2016.
You need to configure Server1 as a Web Application Proxy.
Which server role or role service should you install on Server1?

A. Remote Access
B. Active Directory Federation Services
C. Web Server (IIS)
D. DirectAccess and VPN (RAS)
E. Network Policy and Access Services

Answer: A

Question No : 2

Your network contains an Active Directory forest named contoso.com. The forest contains a single domain. The domain contains a server named Server1. An administrator named Admin01 plans to configure Server1 as a standalone certification authority (CA). You need to identify to which group Admin01 must be a member to configure Server1 as a  standalone CA. The solution must use the principle of least privilege. To which group should you add Admin01?

A. Administrators on Server1.
B. Domain Admins in contoso.com
C. Cert Publishers on Server1
D. Key Admins in contoso.com

Answer: A

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Question No : 3

You network contains an Active Directory domain named contoso.com. The domain contains 1,000 desktop computers and 500 laptops. An organizational unit (OU) named OU1 contains the computer accounts for the desktop computers and the laptops. You create a Windows PowerShell script named Script1.ps1 that removes temporary files and cookies. You create a Group Policy object (GPO) named GPO1 and link GPO1 to OU1. You need to run the script once weekly only on the laptops. 

What should you do?

A. In GPO1, create a File preference that uses item-level targeting.
B. In GPO1, create a Scheduled Tasks preference that uses item-level targeting.
C. In GPO1, configure the File System security policy. Attach a WMI filter to GPO1.
D. In GPO1, add Script1.ps1 as a startup script. Attach a WMI filter to GPO1.

Answer: B

Question No : 4

Drag and Drop Question
Your company has multiple offices.
The network contains an Active Directory domain named contoso.com. An Active Directory site exists for each office. All of the sites connect to each other by using DEFAULTIPSITELINK.
The company plans to open a new office. The new office will have a domain controller and 100 client computers. You install Windows Server 2016 on a member server in the new office. The new server will become a domain controller. You need to deploy the domain controller to the new office. The solution must ensure that the
client computers in the new office will authenticate by using the local domain controller. Which three actions should you perform next in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.

Answer: 

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Question No : 5

Your network contains an Active Directory domain named contoso.com. You have an organizational unit (OU) named OU1 that contains the computer accounts of two servers and the user account of a user named User1. A Group Policy object (GPO) named GPO1 is linked to OU1. You have an application named App1 that installs by using an application installer named App1.exe.You need to publish App1 to OU1 by using Group Policy. 

What should you do?

A. Create a Config.zap file and add a file to the File System node to the Computer Configuration node of GPO1.

B. Create a Config.xml file and add a software installation package to the User Configuration node of GPO1.

C. Create a Config.zap file and add a software installation package to the User Configuration node of GPO1.

D. Create a Config.xml file and add a software installation package to the Computer Configuration node of GPO1.

Answer: C

Question No : 6

You deploy a new enterprise certification authority (CA) named CA1. You plan to issue certificates based on the User certificate template. You need to ensure that the issued certificates are valid for two years and support autoenrollment.

What should you do first?

A. Run the certutil.exe command and specify the resubmit parameter.

B. Duplicate the User certificate template.

C. Add a new certificate template for CA1 to issue.

D. Modify the Request Handling settings for the CA.

Answer: B

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Question No : 10

Start of repeated scenario.

You work for a company named Contoso, Ltd.

The network contains an Active Directory forest named contoso.com. A forest trust exists
between contoso.com and an Active Directory forest named adatum.com.

The contoso.com forest contains the objects configured as shown in the following table.

Group1 and Group2 contain only user accounts.

Contoso hires a new remote user named User3. User3 will work from home and will use a

computer named Computer3 that runs Windows 10. Computer3 is currently in a workgroup.

An administrator named Admin1 is a member of the Domain Admins group in the

contoso.com domain.

From Active Directory Users and Computers, you create an organizational unit (OU) named

OU1 in the contoso.com domain, and then you create a contact named Contact1 in OU1.

An administrator of the adatum.com domain runs the Set-ADUser cmdlet to configure a

user named User1 to have a user logon name of User1@litwareinc.com.

End of repeated scenario.

You need to ensure that User2 can add Group4 as a member of Group5.

What should you modify?

A. the group scope of Group5

B. the Managed By settings of Group4

C. the group scope of Group4

D. the Managed By settings of Group5

Answer: D

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Question No : 9

Your network contains an Active Directory domain named contoso.com.

You recently deleted 5,000 objects from the Active Directory database.

You need to reduce the amount of disk space used to store the Active Directory database on a domain controller

A. Dsadd quota
B. Dsmod
C. Active Directory Administrative Center
D. Dsacls
E. Domain
F. Active Directory Users and Computers
G. Ntdsutil
H. Group Policy Management Console

Answer: G

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Question No : 8

After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.

You deploy a new Active Directory forest.

You need to ensure that you can create a group Managed Service Account (gMSA) for multiple member servers.

Solution: You configure Kerberos constrained delegation on the computer account of each member server.

Does this meet the goal?

A. Yes
B. No


Answer: B