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terraform-aws-access
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terraform-aws-access/notes/policies.md

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# Policies
Specifically talking about IAM policies necessary for enabling OIDC between GitHub runners and AWS.
There is an excellent tutorial on how to get started with this in the AWS credential action's repo:
https://github.com/aws-actions/configure-aws-credentials?tab=readme-ov-file#oidc.
One thing they can't cover there is what permissions to give, because they are application specific.
I have been meaning to add the policies you should set here somewhere, so I am dumping it in this note.
I split my policies into two parts: access and server.
I am not sure if these are exactly least priviledge, but pretty close,
I suggest monitoring the access and reducing as seems possible.
Please remember that these are just my notes, make good decisions and evaluate your security concerns.
## Access
```
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "Tags",
"Effect": "Allow",
"Action": [
"ec2:CreateTags",
"ec2:DeleteTags",
"ec2:DescribeTags"
],
"Resource": "*"
},
{
"Sid": "VPC",
"Effect": "Allow",
"Action": [
"ec2:CreateVpc",
"ec2:DeleteVpc",
"ec2:DescribeVpcs",
"ec2:DescribeVpcAttribute",
"ec2:ModifyVpcAttribute",
"ec2:MoveAddressToVpc",
"ec2:DisassociateVpcCidrBlock",
"ec2:AssociateVpcCidrBlock",
"ec2:CreateDefaultVpc"
],
"Resource": "*"
},
{
"Sid": "InternetGateway",
"Effect": "Allow",
"Action": [
"ec2:CreateInternetGateway",
"ec2:DeleteInternetGateway",
"ec2:AttachInternetGateway",
"ec2:DetachInternetGateway",
"ec2:DescribeInternetGateways"
],
"Resource": "*"
},
{
"Sid": "Route",
"Effect": "Allow",
"Action": [
"ec2:CreateRoute",
"ec2:DeleteRoute",
"ec2:CreateRouteTable",
"ec2:DeleteRouteTable",
"ec2:DescribeRouteTables",
"ec2:DisassociateRouteTable",
"ec2:ReplaceRoute",
"ec2:ReplaceRouteTableAssociation",
"ec2:AssociateRouteTable"
],
"Resource": "*"
},
{
"Sid": "Subnet",
"Effect": "Allow",
"Action": [
"ec2:CreateSubnet",
"ec2:AssociateSubnetCidrBlock",
"ec2:CreateSubnetCidrReservation",
"ec2:DeleteSubnetCidrReservation",
"ec2:DisassociateSubnetCidrBlock",
"ec2:GetSubnetCidrReservations",
"ec2:ModifySubnetAttribute",
"ec2:CreateDefaultSubnet",
"ec2:DeleteSubnet",
"ec2:DescribeSubnets",
"ec2:DescribeAvailabilityZones",
"ec2:DescribeAddresses",
"ec2:DescribeAddressesAttribute",
"ec2:DescribeAddressTransfers",
"ec2:DescribeMovingAddresses",
"ec2:AllocateAddress",
"ec2:AssociateAddress",
"ec2:DisassociateAddress",
"ec2:ModifyAddressAttribute",
"ec2:ReleaseAddress"
],
"Resource": "*"
},
{
"Sid": "SecurityGroup",
"Effect": "Allow",
"Action": [
"ec2:CreateSecurityGroup",
"ec2:DeleteSecurityGroup",
"ec2:DescribeSecurityGroups",
"ec2:AuthorizeSecurityGroupEgress",
"ec2:AuthorizeSecurityGroupIngress",
"ec2:DescribeSecurityGroupReferences",
"ec2:ModifySecurityGroupRules",
"ec2:DescribeSecurityGroupRules",
"ec2:RevokeSecurityGroupIngress",
"ec2:RevokeSecurityGroupEgress",
"ec2:UpdateSecurityGroupRuleDescriptionsEgress",
"ec2:UpdateSecurityGroupRuleDescriptionsIngress"
],
"Resource": "*"
},
{
"Sid": "SshKeyPair",
"Effect": "Allow",
"Action": [
"ec2:CreateKeyPair",
"ec2:DeleteKeyPair",
"ec2:DescribeKeyPairs",
"ec2:ImportKeyPair"
],
"Resource": "*"
},
{
"Sid": "Domain",
"Effect": "Allow",
"Action": [
"route53:GetChange",
"route53:GetHostedZone",
"route53:ListCidrBlocks",
"route53:ListHostedZones",
"route53:ListHostedZonesByName",
"route53:ListHostedZonesByVPC",
"route53:ListResourceRecordSets",
"route53:GetHostedZoneLimit",
"route53:ListTagsForResource",
"route53:ListTagsForResources",
"route53:TestDNSAnswer",
"route53:AssociateVPCWithHostedZone",
"route53:ChangeResourceRecordSets",
"route53:ChangeCidrCollection",
"route53:CreateCidrCollection",
"route53:CreateHostedZone",
"route53:DeleteHostedZone",
"route53:DeleteCidrCollection",
"route53:CreateVPCAssociationAuthorization",
"route53:DeleteVPCAssociationAuthorization",
"route53:DisassociateVPCFromHostedZone",
"route53:UpdateHostedZoneComment",
"route53:UpdateHealthCheck",
"route53:ChangeTagsForResource",
"route53:ListHealthChecks",
"route53:GetHealthCheck",
"route53:GetAccountLimit",
"route53:ListCidrLocations",
"route53:ListCidrCollections",
"route53:GetHostedZoneCount",
"route53:CreateHealthCheck",
"route53:DeleteHealthCheck",
"iam:UploadServerCertificate",
"iam:ListServerCertificates",
"iam:ListServerCertificateTags",
"iam:DeleteServerCertificate",
"iam:TagServerCertificate",
"iam:GetServerCertificate",
"iam:UntagServerCertificate"
],
"Resource": "*"
},
{
"Sid": "Loadbalancing",
"Effect": "Allow",
"Action": [
"elasticloadbalancing:CreateLoadBalancer",
"ec2:CreateSecurityGroup",
"ec2:DescribeAccountAttributes",
"ec2:DescribeInternetGateways",
"ec2:DescribeSecurityGroups",
"ec2:DescribeSubnets",
"ec2:DescribeVpcs",
"elasticloadbalancing:AttachLoadBalancerToSubnets",
"elasticloadbalancing:ApplySecurityGroupsToLoadBalancer",
"elasticloadbalancing:DeregisterInstancesFromLoadBalancer",
"ec2:DescribeClassicLinkInstances",
"ec2:DescribeInstances",
"elasticloadbalancing:DescribeInstanceHealth",
"elasticloadbalancing:DescribeLoadBalancers",
"elasticloadbalancing:DisableAvailabilityZonesForLoadBalancer",
"elasticloadbalancing:EnableAvailabilityZonesForLoadBalancer",
"elasticloadbalancing:RegisterInstancesWithLoadBalancer",
"ec2:DescribeVpcClassicLink",
"elasticloadbalancing:AddTags",
"elasticloadbalancing:ModifyLoadBalancerAttributes",
"elasticloadbalancing:DescribeLoadBalancerAttributes",
"elasticloadbalancing:DescribeListeners",
"elasticloadbalancing:DescribeTags",
"elasticloadbalancing:DescribeRules",
"elasticloadbalancing:DescribeTargetGroupAttributes",
"elasticloadbalancing:DescribeTargetGroups",
"elasticloadbalancing:DescribeTargetHealth",
"elasticloadbalancing:DescribeSSLPolicies",
"elasticloadbalancing:DescribeListenerCertificates",
"elasticloadbalancing:AddListenerCertificates",
"elasticloadbalancing:CreateListener",
"elasticloadbalancing:CreateRule",
"elasticloadbalancing:CreateTargetGroup",
"elasticloadbalancing:DeleteListener",
"elasticloadbalancing:DeleteLoadBalancer",
"elasticloadbalancing:DeleteRule",
"elasticloadbalancing:DeleteTargetGroup",
"elasticloadbalancing:DeregisterTargets",
"elasticloadbalancing:ModifyListener",
"elasticloadbalancing:ModifyRule",
"elasticloadbalancing:ModifyTargetGroup",
"elasticloadbalancing:ModifyTargetGroupAttributes",
"elasticloadbalancing:RegisterTargets",
"elasticloadbalancing:RemoveListenerCertificates",
"elasticloadbalancing:SetIpAddressType",
"elasticloadbalancing:SetRulePriorities",
"elasticloadbalancing:SetSecurityGroups",
"elasticloadbalancing:SetSubnets",
"elasticloadbalancing:RemoveTags",
"elasticloadbalancing:ConfigureHealthCheck",
"elasticloadbalancing:DescribeLoadBalancerPolicies",
"elasticloadbalancing:DescribeLoadBalancerPolicyTypes",
"elasticloadbalancing:CreateLoadBalancerListeners",
"elasticloadbalancing:CreateLoadBalancerPolicy",
"elasticloadbalancing:DeleteLoadBalancerListeners",
"elasticloadbalancing:DeleteLoadBalancerPolicy",
"elasticloadbalancing:DetachLoadBalancerFromSubnets",
"elasticloadbalancing:SetLoadBalancerListenerSSLCertificate",
"elasticloadbalancing:SetLoadBalancerPoliciesForBackendServer",
"elasticloadbalancing:SetLoadBalancerPoliciesOfListener"
],
"Resource": "*"
}
]
}
```
## Server
```
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "ManageEC2Instances",
"Effect": "Allow",
"Action": [
"ec2:DescribeInstanceAttribute",
"ec2:DescribeInstances",
"ec2:DescribeInstanceStatus",
"ec2:DescribeInstanceTypeOfferings",
"ec2:DescribeInstanceCreditSpecifications",
"ec2:DescribeInstanceTypes",
"ec2:GetInstanceTypesFromInstanceRequirements",
"ec2:ImportInstance",
"ec2:ModifyInstanceAttribute",
"ec2:ModifyInstanceMetadataOptions",
"ec2:RebootInstances",
"ec2:ReportInstanceStatus",
"ec2:ResetInstanceAttribute",
"ec2:RunInstances",
"ec2:StartInstances",
"ec2:StopInstances",
"ec2:TerminateInstances",
"ec2:CreateTags",
"ec2:DeleteTags",
"ec2:DescribeTags"
],
"Resource": "*"
},
{
"Sid": "AddressAndInterface",
"Effect": "Allow",
"Action": [
"ec2:DescribeAddresses",
"ec2:DescribeAddressesAttribute",
"ec2:DescribeAddressTransfers",
"ec2:DescribeMovingAddresses",
"ec2:DisableAddressTransfer",
"ec2:DisassociateAddress",
"ec2:EnableAddressTransfer",
"ec2:ModifyAddressAttribute",
"ec2:MoveAddressToVpc",
"ec2:ReleaseAddress",
"ec2:ResetAddressAttribute",
"ec2:UnassignIpv6Addresses",
"ec2:UnassignPrivateIpAddresses",
"ec2:AcceptAddressTransfer",
"ec2:AllocateAddress",
"ec2:AssignIpv6Addresses",
"ec2:AssignPrivateIpAddresses",
"ec2:AssociateAddress",
"ec2:AttachNetworkInterface",
"ec2:CreateNetworkInterface",
"ec2:CreateNetworkInterfacePermission",
"ec2:DeleteNetworkInterface",
"ec2:DeleteNetworkInterfacePermission",
"ec2:DescribeNetworkInterfaceAttribute",
"ec2:DescribeNetworkInterfacePermissions",
"ec2:DescribeNetworkInterfaces",
"ec2:DetachNetworkInterface",
"ec2:ModifyNetworkInterfaceAttribute",
"ec2:ResetNetworkInterfaceAttribute",
"ec2:CreateTags",
"ec2:DeleteTags",
"ec2:DescribeTags"
],
"Resource": "*"
},
{
"Sid": "Image",
"Effect": "Allow",
"Action": [
"ec2:CopyImage",
"ec2:CreateImage",
"ec2:CreateRestoreImageTask",
"ec2:CreateStoreImageTask",
"ec2:DeregisterImage",
"ec2:DescribeExportImageTasks",
"ec2:DescribeImageAttribute",
"ec2:DescribeImages",
"ec2:DescribeImportImageTasks",
"ec2:DescribeStoreImageTasks",
"ec2:DisableImageDeprecation",
"ec2:EnableImageDeprecation",
"ec2:ExportImage",
"ec2:ImportImage",
"ec2:ListImagesInRecycleBin",
"ec2:ModifyImageAttribute",
"ec2:RegisterImage",
"ec2:ResetImageAttribute",
"ec2:RestoreImageFromRecycleBin",
"ec2:CancelImageLaunchPermission",
"ec2:CreateTags",
"ec2:DeleteTags",
"ec2:DescribeTags"
],
"Resource": "*"
},
{
"Sid": "ManageVolumesAndSnapshots",
"Effect": "Allow",
"Action": [
"ec2:AttachVolume",
"ec2:CreateReplaceRootVolumeTask",
"ec2:CreateVolume",
"ec2:DeleteVolume",
"ec2:DescribeReplaceRootVolumeTasks",
"ec2:DescribeVolumeAttribute",
"ec2:DescribeVolumes",
"ec2:DescribeVolumesModifications",
"ec2:DescribeVolumeStatus",
"ec2:DetachVolume",
"ec2:EnableVolumeIO",
"ec2:ImportVolume",
"ec2:ModifyVolume",
"ec2:ModifyVolumeAttribute",
"ec2:CopySnapshot",
"ec2:CreateSnapshot",
"ec2:CreateSnapshots",
"ec2:DeleteSnapshot",
"ec2:DescribeImportSnapshotTasks",
"ec2:DescribeSnapshotAttribute",
"ec2:DescribeSnapshots",
"ec2:DescribeSnapshotTierStatus",
"ec2:ImportSnapshot",
"ec2:ListSnapshotsInRecycleBin",
"ec2:ModifySnapshotAttribute",
"ec2:ModifySnapshotTier",
"ec2:ResetSnapshotAttribute",
"ec2:RestoreSnapshotFromRecycleBin",
"ec2:RestoreSnapshotTier",
"ec2:CreateTags",
"ec2:DeleteTags",
"ec2:DescribeTags"
],
"Resource": "*"
},
{
"Sid": "ManageHostnames",
"Effect": "Allow",
"Action": [
"route53Domains:EnableDomainAutoRenew",
"route53Domains:GetDomainDetail",
"route53Domains:ListDomains",
"route53Domains:ListOperations",
"route53Domains:PushDomain",
"route53Domains:RegisterDomain",
"route53Domains:RenewDomain",
"route53Domains:UpdateDomainContact",
"route53Domains:UpdateDomainContactPrivacy",
"route53Domains:UpdateDomainNameservers",
"route53Resolver:AssociateResolverEndpointIpAddress",
"route53Resolver:UpdateResolverConfig",
"route53:AssociateVPCWithHostedZone",
"route53:CreateHostedZone",
"route53:DeleteHostedZone",
"route53:DisassociateVPCFromHostedZone",
"route53:UpdateHostedZoneComment",
"route53:GetHostedZone",
"route53:GetHostedZoneCount",
"route53:GetHostedZoneLimit",
"route53:ListHostedZones",
"route53:ListHostedZonesByName",
"route53:ListHostedZonesByVPC",
"route53:ListResourceRecordSets",
"route53:ChangeResourceRecordSets",
"route53Resolver:TagResource",
"route53Resolver:UntagResource",
"route53Domains:UpdateTagsForDomain",
"route53Domains:ListTagsForDomain",
"route53Domains:DeleteTagsForDomain",
"route53:ListTagsForResource",
"route53:ChangeTagsForResource",
"route53:ListTagsForResource",
"route53:ListTagsForResources"
],
"Resource": "*"
},
{
"Sid": "S3ForBackup",
"Effect": "Allow",
"Action": [
"s3:CreateBucket",
"s3:DeleteBucket",
"s3:ListBucket",
"s3:ListBucketVersions",
"s3:PutBucketTagging",
"s3:PutBucketVersioning",
"s3:DeleteObject",
"s3:DeleteObjectTagging",
"s3:GetObject",
"s3:GetObjectAcl",
"s3:GetObjectAttributes",
"s3:GetObjectRetention",
"s3:PutObject",
"s3:PutObjectAcl",
"s3:PutObjectRetention",
"s3:PutObjectTagging",
"s3:RestoreObject",
"s3:GetBucketTagging"
],
"Resource": "*"
}
]
}
```
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