terraform.lang.security.rds-public-access.rds-public-access
semgrep
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RDS instance accessible from the Internet detected.
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Defintion
rules:
- id: rds-public-access
patterns:
- pattern: publicly_accessible = true
- pattern-inside: |
resource "aws_db_instance" "..." {
...
}
languages:
- hcl
severity: WARNING
message: RDS instance accessible from the Internet detected.
metadata:
references:
- https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/db_instance#publicly_accessible
- https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_VPC.WorkingWithRDSInstanceinaVPC.html#USER_VPC.Hiding
cwe:
- "CWE-284: Improper Access Control"
category: security
technology:
- terraform
- aws
owasp:
- A05:2017 - Broken Access Control
- A01:2021 - Broken Access Control
subcategory:
- audit
likelihood: LOW
impact: LOW
confidence: LOW
license: Commons Clause License Condition v1.0[LGPL-2.1-only]
vulnerability_class:
- Improper Authorization
Examples
rds-public-access.tf
resource "aws_db_instance" "good_with_defaults" {
# ok: rds-public-access
allocated_storage = 10
engine = "mysql"
engine_version = "5.7"
instance_class = "db.t3.micro"
name = "mydb"
}
resource "aws_db_instance" "good" {
allocated_storage = 10
engine = "mysql"
engine_version = "5.7"
instance_class = "db.t3.micro"
name = "mydb"
# ok: rds-public-access
publicly_accessible = false
}
resource "aws_db_instance" "bad" {
allocated_storage = 10
engine = "mysql"
engine_version = "5.7"
instance_class = "db.t3.micro"
name = "mydb"
# ruleid: rds-public-access
publicly_accessible = true
}
Short Link: https://sg.run/Oye2