You are on your company's development team.
You noticed that your web application hosted in staging on GKE dynamically includes user data in web pages without first properly validating the inputted data.
This could allow an attacker to execute gibberish commands and display arbitrary content in a victim user's browser in a production environment.
How should you prevent and fix this vulnerability?
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A. B. C. D.D.
https://cloud.google.com/security-scanner/docs/remediate-findingsThe vulnerability described in the question is known as cross-site scripting (XSS). It occurs when a web application includes unvalidated or unsanitized user input in its output. Attackers can use XSS to inject malicious scripts into web pages viewed by other users, potentially allowing them to steal sensitive information or perform unauthorized actions on the site.
To prevent and fix this vulnerability, there are several options:
A. Use Cloud IAP based on IP address or end-user device attributes to prevent and fix the vulnerability.
Cloud Identity-Aware Proxy (IAP) is a Google Cloud service that provides secure access to applications running on Google Cloud Platform (GCP). By configuring IAP based on IP address or end-user device attributes, you can restrict access to your web application to only authorized users. This can help prevent unauthorized users from exploiting the XSS vulnerability by blocking their access to the application.
B. Set up an HTTPS load balancer, and then use Cloud Armor for the production environment to prevent the potential XSS attack.
An HTTPS load balancer can help protect your web application by encrypting data in transit and preventing man-in-the-middle attacks. Cloud Armor is a security service that provides defense against DDoS attacks, cross-site scripting (XSS), and SQL injection attacks by filtering incoming traffic before it reaches your application. By using Cloud Armor to protect your production environment, you can help prevent XSS attacks from reaching your application.
C. Use Web Security Scanner to validate the usage of an outdated library in the code, and then use a secured version of the included library.
Web Security Scanner is a Google Cloud service that can scan your web application for security vulnerabilities, including XSS. By using Web Security Scanner to validate the usage of an outdated library in the code, you can identify and fix any vulnerabilities that may be present. You can then use a secured version of the included library to help prevent XSS attacks.
D. Use Web Security Scanner in staging to simulate an XSS injection attack, and then use a templating system that supports contextual auto-escaping.
Using Web Security Scanner to simulate an XSS injection attack in staging can help identify vulnerabilities before they reach production. By using a templating system that supports contextual auto-escaping, you can help prevent XSS attacks by automatically escaping user input before it is included in your web pages.
In summary, all of the answers have merit, but the best option will depend on the specific requirements and constraints of your environment. Option A and B are focused on preventing attacks from reaching the application, while option C and D are focused on identifying and fixing vulnerabilities in the application code.