IAM Role Allows All Principals To Assume
- Query id: f80e3aa7-7b34-4185-954e-440a6894dde6
- Query name: IAM Role Allows All Principals To Assume
- Platform: CloudFormation
- Severity: Low
- Category: Access Control
- URL: Github
Description¶
IAM role allows all services or principals to assume it
Documentation
Code samples¶
Code samples with security vulnerabilities¶
Postitive test num. 1 - yaml file
AWSTemplateFormatVersion: "2010-09-09"
Resources:
RootRole:
Type: "AWS::IAM::Role"
Properties:
AssumeRolePolicyDocument: >
{
"Version": "2012-10-17",
"Statement": [
{
"Action": "sts:AssumeRole",
"Principal": {
"AWS": "arn:aws:iam::root"
},
"Effect": "Allow",
"Sid": ""
}
]
}
Postitive test num. 2 - json file
{
"AWSTemplateFormatVersion": "2010-09-09",
"Resources": {
"RootRole": {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"AWS": [
"arn:aws:iam::root"
]
},
"Action": [
"sts:AssumeRole"
]
}
]
},
"Path": "/"
}
}
}
}
Code samples without security vulnerabilities¶
Negative test num. 1 - yaml file
AWSTemplateFormatVersion: "2010-09-09"
Resources:
RootRole:
Type: "AWS::IAM::Role"
Properties:
AssumeRolePolicyDocument: >
{
"Version": "2012-10-17",
"Statement": [
{
"Action": "sts:AssumeRole",
"Principal": {
"AWS": "arn:aws:iam::root"
},
"Effect": "Deny",
"Sid": ""
}
]
}
Negative test num. 2 - json file
{
"AWSTemplateFormatVersion": "2010-09-09",
"Resources": {
"RootRole": {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Deny",
"Principal": {
"AWS": [
"arn:aws:iam::root"
]
},
"Action": [
"sts:AssumeRole"
]
}
]
},
"Path": "/"
}
}
}
}