CS0-002 Reviews Questions

Server-side input validation is a solution that can prevent cross-site scripting (XSS) vulnerabilities by checking and filtering any user input that is sent to the server before rendering it on a web page. Server-side input validation can help to ensure that the user input conforms to the expected format, length and type, and does not contain any malicious characters or syntax that may alter the logic or behavior of the web page. Server-side input validation can also reject or sanitize any input that does not meet the validation criteria .

Deploying whitelisting to the identified workstations would be the best method to protect these workstations from threats. Whitelisting is a technique that allows only authorized applications, processes, or users to run or access a system or resource. Whitelisting can help limit the attack surface and prevent malware or unauthorized software from running on a system3. Deploying whitelisting to the workstations that are at the end of life can help mitigate the risk of exploitation due to lack of patches or support from the vendor.

"Technical controls enforce confidentiality, integrity, and availability in the digital space. Examples of technical security controls include firewall rules, access control lists, intrusion prevention systems, and encryption."

A technical control is a type of control that uses technology or software to protect data and systems from unauthorized access or misuse3. A technical control can include encryption, authentication, firewalls, antivirus software, and other mechanisms that rely on hardware or software. Placing an ACL (access control list) on a file folder is an example of a technical control. An ACL is a list of permissions that specifies who can access or modify a file or folder4. An ACL can help to enforce confidentiality, integrity, and availability of data by restricting access to authorized users only.

The analyst should request a configuration change on the company’s public DNS as the next step, as this can help resolve the issue of marketing campaigns being filtered by the customer’s email servers. The issue is caused by SPF validation failures, which indicate that the marketing partner’s email address is not authorized to send emails on behalf of the company’s domain. SPF stands for Sender Policy Framework, and it is a mechanism that allows domain owners to specify which IP addresses or hosts are allowed to send emails using their domain name. SPF validation is done by checking the SPF record of the sender’s domain in the public DNS, and comparing it with the IP address or host name of the sender’s email server. To fix this issue, the analyst should request a configuration change on the company’s public DNS to add or update the SPF record to include the marketing partner’s email address or IP address as a valid sender.