Vulnerability · Published Jan 23, 2025 · Assigned by AMZN
CVE-2025-0693Issue with AWS Sign-in IAM User Login Flow - Possible Username Enumeration
Medium 5.3
In plain English
A medium-severity security flaw in AWS Sign-in IAM Login Flow from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 70.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AWS | AWS Sign-in IAM Login Flow | N/A |
Weakness: CWE-204, CWE-208 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- https://aws.amazon.com/security/security-bulletins/AWS-2025-002/ vendor-advisory