CloudWatch Changes To NACL Alarm Missing
- Query id: 0a8e8dc5-b6fc-44fc-b5a1-969ec950f9b0
- Query name: CloudWatch Changes To NACL Alarm Missing
- Platform: Terraform
- Severity: Low
- Category: Observability
- URL: Github
Description¶
Ensure a log metric filter and alarm exist for changes to NACL
Documentation
Code samples¶
Code samples with security vulnerabilities¶
Postitive test num. 1 - tf file
provider "aws" {
region = "us-east-2"
}
resource "aws_cloudwatch_log_group" "CIS_CloudWatch_LogsGroup" {
name = "CIS_CloudWatch_LogsGroup"
}
resource "aws_sns_topic" "cis_alerts_sns_topic" {
name = "cis-alerts-sns-topic"
}
resource "aws_cloudwatch_metric_alarm" "cis_changes_nacl" {
alarm_name = "CIS-4.11-Changes-NACL"
comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = "1"
metric_name = "OTHER FILTER"
namespace = "CIS_Metric_Alarm_Namespace"
period = "300"
statistic = "Sum"
threshold = "1"
alarm_actions = [aws_sns_topic.cis_alerts_sns_topic.arn]
insufficient_data_actions = []
}
resource "aws_cloudwatch_log_metric_filter" "cis_changes_nacl" {
name = "CIS-4.11-Changes-NACL"
pattern = "{ ($.eventName = CreateNetworkAcl) || ($.eventName = CreateNetworkAclEntry) || ($.eventName = DeleteNetworkAcl) || ($.eventName = DeleteNetworkAclEntry) || ($.eventName = ReplaceNetworkAclEntry) || ($.eventName = ReplaceNetworkAclAssociation) }"
log_group_name = aws_cloudwatch_log_group.CIS_CloudWatch_LogsGroup.name
metric_transformation {
name = "CIS-4.11-Changes-NACL"
namespace = "CIS_Metric_Alarm_Namespace"
value = "1"
}
}
Postitive test num. 2 - tf file
provider "aws" {
region = "us-east-2"
}
resource "aws_cloudwatch_log_group" "CIS_CloudWatch_LogsGroup" {
name = "CIS_CloudWatch_LogsGroup"
}
resource "aws_sns_topic" "cis_alerts_sns_topic" {
name = "cis-alerts-sns-topic"
}
resource "aws_cloudwatch_metric_alarm" "cis_changes_nacl" {
alarm_name = "CIS-4.11-Changes-NACL"
comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = "1"
metric_name = aws_cloudwatch_log_metric_filter.cis_changes_nacl.id
namespace = "CIS_Metric_Alarm_Namespace"
period = "300"
statistic = "Sum"
threshold = "1"
alarm_actions = [aws_sns_topic.cis_alerts_sns_topic.arn]
insufficient_data_actions = []
}
resource "aws_cloudwatch_log_metric_filter" "cis_changes_nacl" {
name = "CIS-4.11-Changes-NACL"
pattern = "{ ($.eventName = CreateNetworkAclEntry) || ($.eventName = DeleteNetworkAcl) || ($.eventName = DeleteNetworkAclEntry) || ($.eventName = ReplaceNetworkAclEntry) || ($.eventName = ReplaceNetworkAclAssociation) }"
log_group_name = aws_cloudwatch_log_group.CIS_CloudWatch_LogsGroup.name
metric_transformation {
name = "CIS-4.11-Changes-NACL"
namespace = "CIS_Metric_Alarm_Namespace"
value = "1"
}
}
Code samples without security vulnerabilities¶
Negative test num. 1 - tf file
provider "aws" {
region = "us-east-2"
}
resource "aws_cloudwatch_log_group" "CIS_CloudWatch_LogsGroup" {
name = "CIS_CloudWatch_LogsGroup"
}
resource "aws_sns_topic" "cis_alerts_sns_topic" {
name = "cis-alerts-sns-topic"
}
resource "aws_cloudwatch_metric_alarm" "cis_changes_nacl" {
alarm_name = "CIS-4.11-Changes-NACL"
comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = "1"
metric_name = aws_cloudwatch_log_metric_filter.cis_changes_nacl.id
namespace = "CIS_Metric_Alarm_Namespace"
period = "300"
statistic = "Sum"
threshold = "1"
alarm_actions = [aws_sns_topic.cis_alerts_sns_topic.arn]
insufficient_data_actions = []
}
resource "aws_cloudwatch_log_metric_filter" "cis_changes_nacl" {
name = "CIS-4.11-Changes-NACL"
pattern = "{ ($.eventName = CreateNetworkAcl) || ($.eventName = CreateNetworkAclEntry) || ($.eventName = DeleteNetworkAcl) || ($.eventName = DeleteNetworkAclEntry) || ($.eventName = ReplaceNetworkAclEntry) || ($.eventName = ReplaceNetworkAclAssociation) }"
log_group_name = aws_cloudwatch_log_group.CIS_CloudWatch_LogsGroup.name
metric_transformation {
name = "CIS-4.11-Changes-NACL"
namespace = "CIS_Metric_Alarm_Namespace"
value = "1"
}
}