CAS-002 - CompTIA Advanced Security Practitioner Certification Exam
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A senior network security engineer has been tasked to decrease the attack surface of the corporate network. Which of the following actions would protect the external network interfaces from external attackers performing network scanning?
Test external interfaces to see how they function when they process fragmented IP packets.
There have been some failures of the company's internal facing website. A security engineer has found the WAF to be the root cause of the failures. System logs show that the WAF has been unavailable for 14 hours over the past month, in four separate situations. One of these situations was a two hour scheduled maintenance time, aimed at improving the stability of the WAF. Using the MTTR based on the last month's performance figures, which of the following calculations is the percentage of uptime assuming there were 722 hours in the month?
The security administrator is concerned with SQL injection, and the developer should implement server side input validation.
A well-known retailer has experienced a massive credit card breach. The retailer had gone through an audit and had been presented with a potential problem on their network. Vendors were authenticating directly to the retailer's AD servers, and an improper firewall rule allowed pivoting from the AD server to the DMZ where credit card servers were kept. The firewall rule was needed for an internal application that was developed, which presents risk. The retailer determined that because the vendors were required to have site to site VPN's no other security action was taken. To prove to the retailer the monetary value of this risk, which of the following type of calculations is needed?
Quantitative Risk Analysis
A large enterprise acquires another company which uses antivirus from a different vendor. The CISO has requested that data feeds from the two different antivirus platforms be combined in a way that allows management to assess and rate the overall effectiveness of antivirus across the entire organization. Which of the following tools can BEST meet the CISO's requirement?
A web developer is responsible for a simple web application that books holiday accommodations. The front-facing web server offers an HTML form, which asks for a user's age. This input gets placed into a signed integer variable and is then checked to ensure that the user is in the adult age range. Users have reported that the website is not functioning correctly. The web developer has inspected log files and sees that a very large number (in the billions) was submitted just before the issue started occurring. Which of the following is the MOST likely situation that has occurred?
The age variable has had an integer overflow and was assigned a very small negative number which led to unpredictable application behavior. Improper error handling prevented the application from recovering.
An information security assessor for an organization finished an assessment that identified critical issues with the human resource new employee management software application. The assessor submitted the report to senior management but nothing has happened. Which of the following would be a logical next step?
Schedule a meeting with key human resource application stakeholders.
A security administrator is assessing a new application. The application uses an API that is supposed to encrypt text strings that are stored in memory. How might the administrator test that the strings are indeed encrypted in memory?
Initiate a core dump of the application
A company has received the contract to begin developing a new suite of software tools to replace an aging collaboration solution. The original collaboration solution has been in place for nine years, contains over a million lines of code, and took over two years to develop originally. The SDLC has been broken up into eight primary stages, with each stage requiring an in-depth risk analysis before moving on to the next phase. Which of the following software development methods is MOST applicable?
A software development manager is taking over an existing software development project. The team currently suffers from poor communication due to a long delay between requirements documentation and feature delivery. This gap is resulting in an above average number of security-related bugs making it into production. Which of the following development methodologies is the team MOST likely using now?
A system administrator needs to meet the maximum amount of security goals for a new DNS infrastructure. The administrator deploys DNSSEC extensions to the domain names and infrastructure. Which of the following security goals does this meet? (Select TWO).
Company A needs to export sensitive data from its financial system to company B's database, using company B's API in an automated manner. Company A's policy prohibits the use of any intermediary external systems to transfer or store its sensitive data, therefore the transfer must occur directly between company A's financial system and company B's destination server using the supplied API. Additionally, company A's legacy financial software does not support encryption, while company B's API supports encryption. Which of the following will provide end-to-end encryption for the data transfer while adhering to these requirements?
Company A must install an SSL tunneling software on the financial system.
The Chief Information Officer (CIO) is reviewing the IT centric BIA and RA documentation. The documentation shows that a single 24 hours downtime in a critical business function will cost the business $2.3 million. Additionally, the business unit which depends on the critical business function has determined that there is a high probability that a threat will materialize based on historical data. The CIO's budget does not allow for full system hardware replacement in case of a catastrophic failure, nor does it allow for the purchase of additional compensating controls. Which of the following should the CIO recommend to the finance director to minimize financial loss?
The company should transfer the risk.
A security administrator is performing VDI traffic data collection on a virtual server which migrates from one host to another. While reviewing the data collected by the protocol analyzer, the security administrator notices that sensitive data is present in the packet capture. Which of the following should the security administrator recommend to ensure the confidentiality of sensitive information during live VM migration, while minimizing latency issues?
A separate physical interface placed on a private VLAN should be configured for live host operations.
A company has noticed recently that its corporate information has ended up on an online forum. An investigation has identified that internal employees are sharing confidential corporate information on a daily basis. Which of the following are the MOST effective security controls that can be implemented to stop the above problem? (Select TWO).
Security awareness compliance training for all employees
Implement DLP on the desktop, email gateway, and web proxies
A security firm is writing a response to an RFP from a customer that is building a new network based software product. The firm's expertise is in penetration testing corporate networks. The RFP explicitly calls for all possible behaviors of the product to be tested, however, it does not specify any particular method to achieve this goal. Which of the following should be used to ensure the security and functionality of the product? (Select TWO).
White box testing
A forensic analyst works for an e-discovery firm where several gigabytes of data are processed daily. While the business is lucrative, they do not have the resources or the scalability to adequately serve their clients. Since it is an e-discovery firm where chain of custody is important, which of the following scenarios should they consider?
Using a community cloud with adequate controls
A large company is preparing to merge with a smaller company. The smaller company has been very profitable, but the smaller company's main applications were created in-house. Which of the following actions should the large company's security administrator take in preparation for the merger?
A security assessment should be performed to establish the risks of integration or co- existence.
Two universities are making their 802.11n wireless networks available to the other university's students. The infrastructure will pass the student's credentials back to the home school for authentication via the Internet. The requirements are: The following design was implemented: WPA2 Enterprise using EAP-PEAP-MSCHAPv2 will be used for wireless security RADIUS proxy servers will be used to forward authentication requests to the home school The RADIUS servers will have certificates from a common public certificate authority A strong shared secret will be used for RADIUS server authentication Which of the following security considerations should be added to the design?
The transport layer between the RADIUS servers should be secured
An employee is performing a review of the organization's security functions and noticed that there is some cross over responsibility between the IT security team and the financial fraud team. Which of the following security documents should be used to clarify the roles and responsibilities between the teams?
A large hospital has implemented BYOD to allow doctors and specialists the ability to access patient medical records on their tablets. The doctors and specialists access patient records over the hospital's guest WiFi network which is isolated from the internal network with appropriate security controls. The patient records management system can be accessed from the guest network and requires two factor authentication. Using a remote desktop type interface, the doctors and specialists can interact with the hospital's system. Cut and paste and printing functions are disabled to prevent the copying of data to BYOD devices. Which of the following are of MOST concern? (Select TWO).
Privacy could be compromised as patient records can be viewed in uncontrolled areas.
Malware may be on BYOD devices which can extract data via key logging and screen scrapes.
A small company is developing a new Internet-facing web application. The security requirements are: 1. Users of the web application must be uniquely identified and authenticated. 2. Users of the web application will not be added to the company's directory services. 3. Passwords must not be stored in the code. Which of the following meets these requirements?
Use OpenID and allow a third party to authenticate users.
A company has a difficult time communicating between the security engineers, application developers, and sales staff. The sales staff tends to overpromise the application deliverables. The security engineers and application developers are falling behind schedule. Which of the following should be done to solve this?
Allow the sales staff to shadow the developers and engineers to see how their sales impact the deliverables.
Due to compliance regulations, a company requires a yearly penetration test. The Chief Information Security Officer (CISO) has asked that it be done under a black box methodology. Which of the following would be the advantage of conducting this kind of penetration test?
The results should reflect what attackers may be able to learn about the company.
The DLP solution has been showing some unidentified encrypted data being sent using FTP to a remote server. A vulnerability scan found a collection of Linux servers that are missing OS level patches. Upon further investigation, a technician notices that there are a few unidentified processes running on a number of the servers. What would be a key FIRST step for the data security team to undertake at this point?
Conduct a bit level image, including RAM, of one or more of the Linux servers.
A security analyst, Ann, states that she believes Internet facing file transfer servers are being attacked. Which of the following is evidence that would aid Ann in making a case to management that action needs to be taken to safeguard these servers?
Compare the current activity to the baseline of normal activity
It has come to the IT administrator's attention that the "post your comment" field on the company blog page has been exploited, resulting in cross-site scripting attacks against customers reading the blog. Which of the following would be the MOST effective at preventing the "post your comment" field from being exploited?
Ann is testing the robustness of a marketing website through an intercepting proxy. She has intercepted the following HTTP request: POST /login.aspx HTTP/1.1 Host: comptia.org Content-type: text/html txtUsername=ann&txtPassword=ann&alreadyLoggedIn=false&submit=true Which of the following should Ann perform to test whether the website is susceptible to a simple authentication bypass?
Remove the txtPassword post data and change alreadyLoggedIn from false to true
A security engineer on a large enterprise network needs to schedule maintenance within a fixed window of time. A total outage period of four hours is permitted for servers. Workstations can undergo maintenance from 8:00 pm to 6:00 am daily. Which of the following can specify parameters for the maintenance work? (Select TWO).
Memorandum of understanding
Operating level agreement
The Information Security Officer (ISO) believes that the company has been targeted by cybercriminals and it is under a cyber attack. Internal services that are normally available to the public via the Internet are inaccessible, and employees in the office are unable to browse the Internet. The senior security engineer starts by reviewing the bandwidth at the border router, and notices that the incoming bandwidth on the router's external interface is maxed out. The security engineer then inspects the following piece of log to try and determine the reason for the downtime, focusing on the company's external router's IP which is 18.104.22.168: 11:16:22.110343 IP 22.214.171.124.19 > 126.96.36.199.19: UDP, length 1400 11:16:22.110351 IP 188.8.131.52.19 > 184.108.40.206.19: UDP, length 1400 11:16:22.110358 IP 220.127.116.11.19 > 18.104.22.168.19: UDP, length 1400 11:16:22.110402 IP 22.214.171.124.19 > 126.96.36.199.19: UDP, length 1400 11:16:22.110406 IP 188.8.131.52.19 > 184.108.40.206.19: UDP, length 1400 Which of the following describes the findings the senior security engineer should report to the ISO and the BEST solution for service restoration?
After the senior engineer used a network analyzer to identify an active Fraggle attack, the company's ISP should be contacted and instructed to block the malicious packets.
A port in a fibre channel switch failed, causing a costly downtime on the company's primary website. Which of the following is the MOST likely cause of the downtime?
The web server was not multipathed.
Customers have recently reported incomplete purchase history and other anomalies while accessing their account history on the web server farm. Upon investigation, it has been determined that there are version mismatches of key e-commerce applications on the production web servers. The development team has direct access to the production servers and is most likely the cause of the different release versions. Which of the following process level solutions would address this problem?
Implement change control practices at the organization level.
An internal development team has migrated away from Waterfall development to use Agile development. Overall, this has been viewed as a successful initiative by the stakeholders as it has improved time-to-market. However, some staff within the security team have contended that Agile development is not secure. Which of the following is the MOST accurate statement?
Agile development has different phases and timings compared to Waterfall. Security activities need to be adapted and performed within relevant Agile phases.
An IT manager is working with a project manager to implement a new ERP system capable of transacting data between the new ERP system and the legacy system. As part of this process, both parties must agree to the controls utilized to secure data connections between the two enterprise systems. This is commonly documented in which of the following formal documents?
Interconnection Security Agreement
Due to a new regulatory requirement, ABC Company must now encrypt all WAN transmissions. When speaking with the network administrator, the security administrator learns that the existing routers have the minimum processing power to do the required level of encryption. Which of the following solutions minimizes the performance impact on the router?
Deploy inline network encryption devices
A risk manager has decided to use likelihood and consequence to determine the risk of an event occurring to a company asset. Which of the following is a limitation of this approach to risk management?
Subjective and based on an individual's experience.
A security consultant is conducting a network assessment and wishes to discover any legacy backup Internet connections the network may have. Where would the consultant find this information and why would it be valuable?
This information can be found in global routing tables, and is valuable because backup connections typically do not have perimeter protection as strong as the primary connection.
A security administrator notices a recent increase in workstations becoming compromised by malware. Often, the malware is delivered via drive-by downloads, from malware hosting websites, and is not being detected by the corporate antivirus. Which of the following solutions would provide the BEST protection for the company?
Deploy a cloud-based content filter and enable the appropriate category to prevent further infections.
The technology steering committee is struggling with increased requirements stemming from an increase in telecommuting. The organization has not addressed telecommuting in the past. The implementation of a new SSL-VPN and a VOIP phone solution enables personnel to work from remote locations with corporate assets. Which of the following steps must the committee take FIRST to outline senior management's directives?
Publish a policy that addresses the security requirements for working remotely with company equipment.
A security officer is leading a lessons learned meeting. Which of the following should be components of that meeting? (Select TWO).
Discussion of event timeline
Assigning of follow up items
A medical device manufacturer has decided to work with another international organization to develop the software for a new robotic surgical platform to be introduced into hospitals within the next 12 months. In order to ensure a competitor does not become aware, management at the medical device manufacturer has decided to keep it secret until formal contracts are signed. Which of the following documents is MOST likely to contain a description of the initial terms and arrangement and is not legally enforceable?
An analyst connects to a company web conference hosted on www.webconference.com/meetingID#01234 and observes that numerous guests have been allowed to join, without providing identifying information. The topics covered during the web conference are considered proprietary to the company. Which of the following security concerns does the analyst present to management?
Unauthenticated users could present a risk to the confidentiality of the company's information
A human resources manager at a software development company has been tasked with recruiting personnel for a new cyber defense division in the company. This division will require personnel to have high technology skills and industry certifications. Which of the following is the BEST method for this manager to gain insight into this industry to execute the task?
Attend conferences, webinars, and training to remain current with the industry and job requirements
A company has issued a new mobile device policy permitting BYOD and company-issued devices. The company-issued device has a managed middleware client that restricts the applications allowed on company devices and provides those that are approved. The middleware client provides configuration standardization for both company owned and BYOD to secure data and communication to the device according to industry best practices. The policy states that, "BYOD clients must meet the company's infrastructure requirements to permit a connection." The company also issues a memorandum separate from the policy, which provides instructions for the purchase, installation, and use of the middleware client on BYOD. Which of the following is being described?
The latest independent research shows that cyber attacks involving SCADA systems grew an average of 15% per year in each of the last four years, but that this year's growth has slowed to around 7%. Over the same time period, the number of attacks against applications has decreased or stayed flat each year. At the start of the measure period, the incidence of PC boot loader or BIOS based attacks was negligible. Starting two years ago, the growth in the number of PC boot loader attacks has grown exponentially. Analysis of these trends would seem to suggest which of the following strategies should be employed?
Spending on SCADA security controls should stay steady; application control spending should decrease slightly and spending on PC boot loader protections should increase substantially.
The risk manager at a small bank wants to use quantitative analysis to determine the ALE of running a business system at a location which is subject to fires during the year. A risk analyst reports to the risk manager that the asset value of the business system is $120,000 and, based on industry data, the exposure factor to fires is only 20% due to the fire suppression system installed at the site. Fires occur in the area on average every four years. Which of the following is the ALE?
VPN users cannot access the active FTP server through the router but can access any server in the data center. Additional network information: DMZ network 192.168.5.0/24 (FTP server is 192.168.5.11) VPN network 192.168.1.0/24 Datacenter 192.168.2.0/24 User network - 192.168.3.0/24 HR network 192.168.4.0/24\ Traffic shaper configuration: VLAN Bandwidth Limit (Mbps) VPN50 User175 HR250 Finance250 Guest0 Router ACL: ActionSourceDestination Permit192.168.1.0/24192.168.2.0/24 Permit192.168.1.0/24192.168.3.0/24 Permit192.168.1.0/24192.168.5.0/24 Permit192.168.2.0/24192.168.1.0/24 Permit192.168.3.0/24192.168.1.0/24 Permit192.168.5.1/32192.168.1.0/24 Deny192.168.4.0/24192.168.1.0/24 Deny192.168.1.0/24192.168.4.0/24 Denyanyany Which of the following solutions would allow the users to access the active FTP server?
Add a permit statement to allow traffic from 192.168.5.0/24 to the VPN network
The Chief Information Security Officer (CISO) at a large organization has been reviewing some security-related incidents at the organization and comparing them to current industry trends. The desktop security engineer feels that the use of USB storage devices on office computers has contributed to the frequency of security incidents. The CISO knows the acceptable use policy prohibits the use of USB storage devices. Every user receives a popup warning about this policy upon login. The SIEM system produces a report of USB violations on a monthly basis; yet violations continue to occur. Which of the following preventative controls would MOST effectively mitigate the logical risks associated with the use of USB storage devices?
Implement group policy objects
An assessor identifies automated methods for identifying security control compliance through validating sensors at the endpoint and at Tier 2. Which of the following practices satisfy continuous monitoring of authorized information systems?
A user has a laptop configured with multiple operating system installations. The operating systems are all installed on a single SSD, but each has its own partition and logical volume. Which of the following is the BEST way to ensure confidentiality of individual operating system data?
Encryption of each individual partition