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Exam AWS Certified Security - Specialty SCS-C02 All Questions

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Exam AWS Certified Security - Specialty SCS-C02 topic 1 question 162 discussion

Exam question from Amazon's AWS Certified Security - Specialty SCS-C02
Question #: 162
Topic #: 1
[All AWS Certified Security - Specialty SCS-C02 Questions]

A company has a web-based application that runs behind an Application Load Balancer (ALB). The application is experiencing a credential stuffing attack that is producing many failed login attempts. The attack is coming from many IP addresses. The login attempts are using a user agent string of a known mobile device emulator.

A security engineer needs to implement a solution to mitigate the credential stuffing attack. The solution must still allow legitimate logins to the application.

Which solution will meet these requirements?

  • A. Create an Amazon CloudWatch alarm that reacts to login attempts that contain the specified user agent string Add an Amazon Simple Notification Service (Amazon SNS) topic to the alarm.
  • B. Modify the inbound security group on the ALB to deny traffic from the IP addresses that are involved in the attack.
  • C. Create an AWS WAF web ACL for the ALB Create a custom rule that blocks requests that contain the user agent string of the device emulator.
  • D. Create an AWS WAF web ACL for the ALB. Create a custom rule that allows requests from legitimate user agent strings.
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Suggested Answer: C 🗳️
by aescudero51 at June 1, 2024, 4:18 p.m.
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aescudero51
4 months ago
Selected Answer: C
Answer is C A. CloudWatch Alarm with SNS: This would only notify the security team about the attack, not actively block it. B. Deny traffic from attack IPs: This might block legitimate users if they share the same IP range as attackers (e.g., company using a VPN). D. Allow requests from legitimate user agents: Creating an exhaustive list of legitimate user agents is difficult and can be bypassed by attackers using slightly modified strings. Option C targets the specific characteristic of the attack (mobile device emulator user agent) and blocks those requests, allowing legitimate users with different user agents to access the application.
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