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.
References (1)
Core 1
Core References
Various Sources vendor-advisory
https://aws.amazon.com/security/security-bulletins/AWS-2025-002/
Scores
CVSS v3
5.3
EPSS
0.0034
EPSS Percentile
25.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-204
CWE-208
Status
published
Products (1)
AWS/AWS Sign-in IAM Login Flow
Published
Jan 23, 2025
Tracked Since
Feb 18, 2026