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Protect platform security groups in permission boundary #81

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Merged
Alexanderamiri merged 1 commit into from
Mar 17, 2026
Merged

Protect platform security groups in permission boundary #81

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27 changes: 27 additions & 0 deletions terraform/platform/iam/boundary.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -157,6 +157,33 @@ resource "aws_iam_policy" "developer_boundary" {
Resource = "*"
},

########################################################################
# Protect platform security groups
#
# Teams CAN create security groups (needed for RDS, custom services).
# Teams CANNOT modify or delete platform-owned security groups.
# Platform SGs are named javabin-* (e.g., javabin-alb-sg, javabin-ecs-tasks-sg).
# App SGs use app-name prefix (e.g., moresleep-rds-sg).
########################################################################
{
Sid = "DenyPlatformSecurityGroups"
Effect = "Deny"
Action = [
"ec2:DeleteSecurityGroup",
"ec2:AuthorizeSecurityGroupIngress",
"ec2:RevokeSecurityGroupIngress",
"ec2:AuthorizeSecurityGroupEgress",
"ec2:RevokeSecurityGroupEgress",
"ec2:ModifySecurityGroupRules",
]
Resource = "arn:aws:ec2:${var.region}:${var.aws_account_id}:security-group/*"
Condition = {
StringLike = {
"ec2:ResourceTag/Name" = "${var.project}-*"
}
}
},

########################################################################
# Deny platform ECS cluster, ALB, ACM certs
########################################################################
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