ISC Systems Security Implementation Verification And Validation — 25 Questions

Question 1

You are performing a security validation of a Kubernetes cluster using CIS Benchmarks. Which tool should you use to automate the verification of the 'etcd' configuration settings?

Accepted Answer

Run 'kube-bench --targets etcd' to perform the automated audit.. kube-bench is the industry-standard tool for checking Kubernetes against CIS benchmarks.

Answer

Use 'kubectl get pods' to check the etcd pod configuration.

Answer

Perform a manual audit using 'etcdctl get --prefix /'.

Answer

Use the 'kubectl describe nodes' command to check for node hardening.

Question 2

When validating the security implementation of a Cisco ASA firewall, which command provides the most accurate verification of the currently applied Access Control List (ACL) to a specific interface?

Accepted Answer

show access-list. The 'show access-list' command displays the ordered list of rules and their hit counts, which is vital for validation.

Answer

show run interface

Answer

show version

Answer

show interface status

Question 3

A security engineer is validating the implementation of a TLS 1.3 configuration on an Nginx server. Which configuration directive must be verified to ensure only secure ciphers are used?

Accepted Answer

ssl_protocols TLSv1.3;. The 'ssl_protocols' and 'ssl_ciphers' directives are critical for TLS implementation verification.

Answer

ssl_session_cache shared:SSL:10m;

Answer

ssl_prefer_server_ciphers on;

Answer

ssl_verify_client on;

Question 4

During a penetration test of a web application, you identify an insecure direct object reference (IDOR). What is the most effective way to verify that your remediation via access control checks is successful?

Accepted Answer

Execute automated authorization testing using a tool like Burp Suite Intruder to verify that non-authorized users receive a 403 Forbidden response.. Regression testing ensures that the fix addresses the vulnerability without breaking functionality.

Answer

Review the source code to ensure that the developer used a random UUID instead of sequential integers.

Answer

Run a vulnerability scanner to check for OWASP Top 10 compliance.

Answer

Perform a manual cross-site scripting (XSS) payload injection to confirm input sanitization.

Question 5

A security engineer is validating an AWS environment using AWS Config. Which action should be taken to ensure continuous compliance monitoring against a custom security policy?

Accepted Answer

Deploy an AWS Config custom rule using an AWS Lambda function to evaluate resource configurations.. AWS Config rules allow for the definition of custom policies that trigger evaluations based on resource configuration changes.

Answer

Configure Amazon GuardDuty to alert on unauthorized resource modifications.

Answer

Use AWS Trusted Advisor to scan for unencrypted S3 buckets.

Answer

Enable AWS CloudTrail to log all API calls and review the logs for policy violations.

Question 6

You are verifying the implementation of a FIPS 140-2 validated module in an on-premises Linux server. Which command correctly verifies that the cryptographic module is operating in the intended FIPS mode?

Accepted Answer

Run 'cat /proc/sys/crypto/fips_enabled' and confirm the output is 1.. The fips-mode-setup command or checking the kernel parameter is the standard way to verify the module state on RHEL-based systems.

Answer

Inspect '/etc/fips.conf' for the FIPS_ENABLED=true directive.

Answer

Check the status using 'systemctl status crypto-policy'.

Answer

Execute 'openssl verify -CApath /etc/ssl/certs' to validate certificate chains.

Question 7

You are verifying the implementation of disk encryption on a Windows server. Which command is used to confirm that BitLocker is active on the C: drive?

Accepted Answer

manage-bde -status C:. manage-bde is the CLI tool for BitLocker administration.

Answer

cipher /e

Answer

bitlocker-check

Answer

diskpart /info

Question 8

During a system accreditation process, you need to verify that logs are being sent to a centralized SIEM. Which method provides the most reliable verification of log integrity?

Accepted Answer

Verify the use of mutual TLS (mTLS) and log hashing/signing in the syslog configuration.. Log integrity is verified by ensuring the logs are digitally signed or protected from tampering during transit.

Answer

Verify that the SIEM administrative account has read-only permissions.

Answer

Review the firewall logs to see if port 514 is open.

Answer

Check if the SIEM has received a sample log entry via 'tail -f'.

Question 9

An organization uses an HSM to store root CA keys. As part of the annual validation, which action must be performed to confirm the HSM's physical security posture?

Accepted Answer

Verify the presence and integrity of tamper-evident seals on the chassis.. Physical tamper evidence is a critical component of HSM security validation.

Answer

Perform an audit of the HSM's internal log files.

Answer

Verify the HSM firmware version against the manufacturer's website.

Answer

Test the HSM's response to an incorrect PIN retry threshold.

Question 10

When validating the security of a database implementation, how do you verify that sensitive data at rest is encrypted using Transparent Data Encryption (TDE)?

Accepted Answer

Query the sys.dm_database_encryption_keys dynamic management view.. Verifying the system catalog or dynamic management views is the standard way to confirm TDE status.

Answer

Check if the database folder has the 'encrypted' flag set in Windows File Properties.

Answer

Attempt to open the database file in a text editor.

Answer

Use the 'encrypt' command in the database shell.

Question 11

You are verifying that a firewall rule correctly blocks traffic from an unauthorized network. Which tool is best suited for testing this connectivity?

Accepted Answer

nmap -p 80 <target_ip>. Nmap is a standard network scanning tool used to verify that specific ports are blocked or filtered.

Answer

nslookup <target_ip>

Answer

netstat -an

Answer

ipconfig /all

Question 12

In an SCAP-compliant environment, you are validating a system against a DISA STIG. Which file extension is typically used for the definition of the security checks?

Accepted Answer

.xml. XCCDF (Extensible Configuration Checklist Description Format) is the standard for defining SCAP security checklists.

Answer

.txt

Answer

.stig

Answer

.ovl

Question 13

During a cloud security audit, you need to verify that IAM users do not have overly permissive policies. Which AWS feature provides automated validation of IAM policy adherence to least privilege?

Accepted Answer

AWS IAM Access Analyzer. IAM Access Analyzer helps identify policies that provide public or cross-account access, a key part of validation.

Answer

AWS Security Hub

Answer

AWS CloudTrail

Answer

AWS Trusted Advisor

Question 14

You are validating the security of a web service using OAuth 2.0. Which specific verification step ensures that the authorization code is not leaked?

Accepted Answer

Verify that the redirect_uri is strictly validated against a whitelist on the authorization server.. Validation of OAuth requires ensuring that the redirect URI and other parameters are strictly handled.

Answer

Check the HTTP header for 'X-Frame-Options'.

Answer

Verify that the client secret is stored in the database.

Answer

Ensure the application uses HTTPS.

Question 15

You are verifying the implementation of a microsegmentation policy in a software-defined network (SDN). Which approach is most effective for validating that isolation is enforced?

Accepted Answer

Perform ping tests between VMs in different security zones.. Validating microsegmentation requires testing lateral movement between segments that should be isolated.

Answer

Inspect the physical switch port configuration.

Answer

Review the cloud provider's SLA.

Answer

Check the DNS records for the servers.

Question 16

A security professional is verifying the implementation of MFA on an administrative account. What is the most reliable way to confirm the MFA configuration is working correctly?

Accepted Answer

Attempt to log in with valid credentials and verify that the system prompts for the secondary token.. Successful authentication with a second factor is the ultimate proof of correct implementation.

Answer

Verify that the account has a 'mobile' field populated.

Answer

Review the MFA server logs for daily activity.

Answer

Check the user account settings in the Active Directory console.

Question 17

You are auditing the implementation of an API Gateway. How do you verify that rate limiting is effectively preventing a DoS attack?

Accepted Answer

Send a flood of requests exceeding the defined rate limit and verify that the API returns a 429 Too Many Requests status code.. Testing rate limiting involves exceeding the defined threshold to see if the gateway returns the correct error code.

Answer

Use a vulnerability scanner to check for OWASP API vulnerabilities.

Answer

Review the API Gateway configuration files for the 'rate_limit' keyword.

Answer

Monitor the CPU usage of the backend server.

Question 18

You are verifying that a specific file on a server has not been modified. Which tool or command is most appropriate for verifying file integrity?

Accepted Answer

sha256sum. Hashing is the standard method for verifying that a file has not been altered.

Answer

cat <filename>

Answer

grep 'modified' <filename>

Answer

ls -l

Question 19

When validating a secure boot implementation on a server, which component should be verified in the UEFI firmware settings?

Accepted Answer

Verify that 'Secure Boot' is set to 'Enabled' and the 'Platform Key' (PK) is installed.. Secure Boot validation requires ensuring the UEFI firmware is set to enforce digital signatures on bootloaders.

Answer

Validate the TPM version is 2.0.

Answer

Check that 'Legacy Boot' is set to 'Disabled'.

Answer

Ensure the system clock is synchronized with a secure NTP server.

Question 20

A system is undergoing accreditation. You need to verify that automated vulnerability scanning is occurring on a recurring basis. Which artifact provides the best evidence?

Accepted Answer

A series of scan reports spanning the required frequency interval.. Scheduled task logs or scan reports with time-stamped evidence are the best way to verify recurring operations.

Answer

A copy of the security policy document.

Answer

An email from the security team confirming they run scans.

Answer

A screenshot of the vulnerability scanner dashboard.