VDB-293206 · CVE-2025-0693 · AWS-2025-002

Amazon AWS Sign-in IAM Login Flow response discrepancy

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Amazon AWS Sign-in IAM Login Flow and classified as problematic. Affected by this issue is some unknown functionality. Executing a manipulation can lead to response discrepancy. This vulnerability is handled as CVE-2025-0693. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Amazon AWS Sign-in IAM Login Flow (the affected version is unknown) and classified as problematic. This vulnerability affects an unknown code. The manipulation with an unknown input leads to a response discrepancy vulnerability. The CWE definition for the vulnerability is CWE-204. The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The advisory is available at aws.amazon.com. This vulnerability was named CVE-2025-0693 since 01/23/2025. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Amazon

Name

AWS Sign-in IAM Login Flow

License

commercial

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.5

VulDB Base Score: 3.7
VulDB Temp Score: 3.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (AMZN): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Response discrepancy
CWE: CWE-204 / CWE-203 / CWE-200
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/23/2025 🔍
01/24/2025 +1 days 🔍
01/24/2025 +0 days 🔍
10/15/2025 +264 days 🔍

Sourcesinfo

Advisory: AWS-2025-002
Status: Confirmed

CVE: CVE-2025-0693 (🔍)
GCVE (CVE): GCVE-0-2025-0693
GCVE (VulDB): GCVE-100-293206

Entryinfo

Created: 01/24/2025 07:58
Updated: 10/15/2025 03:20
Changes: 01/24/2025 07:58 (72), 10/15/2025 03:20 (1)
Complete: 🔍
Cache ID: 216::103