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.
Scores
CVSS v3
5.3
EPSS
0.0015
EPSS Percentile
35.0%
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