CWE
204 208
Advisory Published
Updated

CVE-2025-0693: Issue with AWS Sign-in IAM User Login Flow - Possible Username Enumeration

First published: Thu Jan 23 2025(Updated: )

Variable response times in the AWS Sign-in IAM user login flow allowed for the use of brute force enumeration techniques to identify valid IAM usernames in an arbitrary AWS account.

Credit: ff89ba41-3aa1-4d27-914a-91399e9639e5

Affected SoftwareAffected VersionHow to fix
Amazon Web Services

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Frequently Asked Questions

  • What is the severity of CVE-2025-0693?

    CVE-2025-0693 is considered a medium severity vulnerability due to its potential for brute force enumeration of valid IAM usernames.

  • How do I fix CVE-2025-0693?

    To mitigate CVE-2025-0693, implement rate limiting and monitor login attempts to prevent username enumeration through response time analysis.

  • What are the potential impacts of CVE-2025-0693?

    The exploitation of CVE-2025-0693 can lead to unauthorized access attempts by revealing valid IAM usernames.

  • Who is affected by CVE-2025-0693?

    Organizations using Amazon AWS with IAM user login flows are affected by CVE-2025-0693.

  • What is the nature of CVE-2025-0693?

    CVE-2025-0693 specifically targets variable response times during the AWS Sign-in IAM user login flow.

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