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AWS - Cognito Enum

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Cognito provides authentication, authorization, and user management for your web and mobile apps. Your users can sign in directly with a user name and password, or through a third party such as Facebook, Amazon, Google or Apple.
The two main components of Amazon Cognito are user pools and identity pools. User pools are user directories that provide sign-up and sign-in options for your app users. Identity pools enable you to grant your users access to other AWS services.

User pools

To learn what is a Cognito User Pool check:

Identity pools

The learn what is a Cognito Identity Pool check:

Tool for pentesting

Cognito Scanner is a CLI tool in python that implements different attacks on Cognito including account enumeration and privesc escalation.


$ pip install cognito-scanner


$ cognito-scanner --help
For more information check https://github.com/padok-team/cognito-scanner


# List Identity Pools
aws cognito-identity list-identity-pools --max-results 60
aws cognito-identity describe-identity-pool --identity-pool-id "eu-west-2:38b294756-2578-8246-9074-5367fc9f5367"
aws cognito-identity list-identities --identity-pool-id <ident-pool-id> --max-results 60
aws cognito-identity get-identity-pool-roles --identity-pool-id <ident-pool-id>
# Identities Datasets
## Get dataset of identity id (inside identity pool)
aws cognito-sync list-datasets --identity-pool-id <ident-pool-id> --identity-id <ident-id>
## Get info of the dataset
aws cognito-sync describe-dataset --identity-pool-id <value> --identity-id <value> --dataset-name <value>
## Get dataset records
aws cognito-sync list-records --identity-pool-id <value> --identity-id <value> --dataset-name <value>
# User Pools
## Get pools
aws cognito-idp list-user-pools --max-results 60
## Get users
aws cognito-idp list-users --user-pool-id <user-pool-id>
## Get groups
aws cognito-idp list-groups --user-pool-id <user-pool-id>
## Get users in a group
aws cognito-idp list-users-in-group --user-pool-id <user-pool-id> --group-name <group-name>
## List App IDs of a user pool
aws cognito-idp list-user-pool-clients --user-pool-id <user-pool-id>
## List configured identity providers for a user pool
aws cognito-idp list-identity-providers --user-pool-id <user-poo
## List user import jobs
aws cognito-idp list-user-import-jobs --user-pool-id <user-pool-id> --max-results 60
## Get MFA config of a user pool
aws cognito-idp get-user-pool-mfa-config --user-pool-id <user-pool-id>
## Get risk configuration
aws cognito-idp describe-risk-configuration --user-pool-id <user-pool-id>

Identity Pools - Unauthenticated Enumeration

Just knowing the Identity Pool ID you might be able get credentials of the role associated to unauthenticated users (if any). Check how here.

User Pools - Unauthenticated Enumeration

Even if you don't know a valid username inside Cognito, you might be able to enumerate valid usernames, BF the passwords of even register a new user just knowing the App client ID (which is usually found in source code). Check how here.


Unauthenticated Access


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