Description
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.
Published: 2025-01-23
Score: 6.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-1817 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.
History

Tue, 14 Oct 2025 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 23 Jan 2025 21:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Issue with AWS Sign-in IAM User Login Flow - Possible Username Enumeration
Weaknesses CWE-204
CWE-208
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2025-10-14T18:42:46.835Z

Reserved: 2025-01-23T20:36:22.905Z

Link: CVE-2025-0693

cve-icon Vulnrichment

Updated: 2025-01-24T19:33:48.497Z

cve-icon NVD

Status : Deferred

Published: 2025-01-23T22:15:15.397

Modified: 2026-04-15T00:35:42.020

Link: CVE-2025-0693

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses