Beta - CVM instance using default security group

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Metadata

Id: 93bb2065-63ec-45a2-a466-f106b56f2e32

Cloud Provider: TencentCloud

Platform: Terraform

Severity: Low

Category: Access Control

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Description

CVM instances (tencentcloud_instance) should not include the default security group. This rule inspects the orderly_security_groups and security_groups attributes for any occurrence of default and flags the resource if found. Relying on the default security group can result in overly permissive network access and should be avoided.

Compliant Code Examples

resource "tencentcloud_security_group" "sg" {
  name        = "tf-example"
  description = "test"
}

resource "tencentcloud_instance" "cvm_postpaid" {
  instance_name     = "cvm_postpaid"
  availability_zone = "ap-guangzhou-7"
  image_id          = "img-9qrfy1xt"
  instance_type     = "POSTPAID_BY_HOUR"
  system_disk_type  = "CLOUD_PREMIUM"
  system_disk_size  = 50
  hostname          = "root"
  project_id        = 0
  vpc_id            = "vpc-axrsmmrv"
  subnet_id         = "subnet-861wd75e"

  security_groups = [
    tencentcloud_security_group.sg.id
  ]

  data_disks {
    data_disk_type = "CLOUD_PREMIUM"
    data_disk_size = 50
    encrypt        = false
  }

  tags = {
    tagKey = "tagValue"
  }
}

resource "tencentcloud_security_group" "sg" {
  name        = "tf-example"
  description = "test"
}

resource "tencentcloud_instance" "cvm_postpaid" {
  instance_name     = "cvm_postpaid"
  availability_zone = "ap-guangzhou-7"
  image_id          = "img-9qrfy1xt"
  instance_type     = "POSTPAID_BY_HOUR"
  system_disk_type  = "CLOUD_PREMIUM"
  system_disk_size  = 50
  hostname          = "root"
  project_id        = 0
  vpc_id            = "vpc-axrsmmrv"
  subnet_id         = "subnet-861wd75e"

  orderly_security_groups = [
    tencentcloud_security_group.sg.id
  ]

  data_disks {
    data_disk_type = "CLOUD_PREMIUM"
    data_disk_size = 50
    encrypt        = false
  }

  tags = {
    tagKey = "tagValue"
  }
}

Non-Compliant Code Examples

resource "tencentcloud_security_group" "default" {
  name        = "tf-example"
  description = "test"
}

resource "tencentcloud_instance" "cvm_postpaid" {
  instance_name     = "cvm_postpaid"
  availability_zone = "ap-guangzhou-7"
  image_id          = "img-9qrfy1xt"
  instance_type     = "POSTPAID_BY_HOUR"
  system_disk_type  = "CLOUD_PREMIUM"
  system_disk_size  = 50
  hostname          = "root"
  project_id        = 0
  vpc_id            = "vpc-axrsmmrv"
  subnet_id         = "subnet-861wd75e"

  security_groups = [tencentcloud_security_group.default.id]

  data_disks {
    data_disk_type = "CLOUD_PREMIUM"
    data_disk_size = 50
    encrypt        = false
  }

  tags = {
    tagKey = "tagValue"
  }
}

resource "tencentcloud_security_group" "default" {
  name        = "tf-example"
  description = "test"
}

resource "tencentcloud_instance" "cvm_postpaid" {
  instance_name     = "cvm_postpaid"
  availability_zone = "ap-guangzhou-7"
  image_id          = "img-9qrfy1xt"
  instance_type     = "POSTPAID_BY_HOUR"
  system_disk_type  = "CLOUD_PREMIUM"
  system_disk_size  = 50
  hostname          = "root"
  project_id        = 0
  vpc_id            = "vpc-axrsmmrv"
  subnet_id         = "subnet-861wd75e"

  orderly_security_groups = [tencentcloud_security_group.default.id]

  data_disks {
    data_disk_type = "CLOUD_PREMIUM"
    data_disk_size = 50
    encrypt        = false
  }

  tags = {
    tagKey = "tagValue"
  }
}