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AWS security group rule allows public access Affecting VPC service in AWS

Severity

0.0
medium
0
10
    Severity Framework
    Snyk CCSS
    Rule category
    General / Public Access

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  • Snyk ID SNYK-CC-00275
  • credit Snyk Research Team
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Description

Inbound traffic is allowed to a resource from any source instead of a restricted range, and potentially everyone can access your resource.

How to fix?

Set cidr_blocks attribute to specific CIDR block range only, e.g. 192.168.1.0/24.

Example Configuration

resource "aws_security_group_rule" "allowed" {
  type              = "ingress"
  from_port         = 0
  to_port           = 65535
  protocol          = "tcp"
  cidr_blocks       = ["192.168.1.0/24"]
  security_group_id = "sg-12345678"
}