CloudWatch IAM Policy Changes Alarm Missing
- Query id: eaaba502-2f94-411a-a3c2-83d63cc1776d
- Query name: CloudWatch IAM Policy Changes Alarm Missing
- Platform: Terraform
- Severity: Low
- Category: Observability
- CWE: 778
- URL: Github
Description¶
Ensure a log metric filter and alarm exist for IAM policy changes
Documentation
Code samples¶
Code samples with security vulnerabilities¶
Positive 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_iam_policy_change" {
alarm_name = "CIS-4.4-IAM-Policy-Change"
comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = "1"
metric_name = "XXXX NOT YOUR FILTER XXXX"
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_iam_policy_change" {
name = "CIS-4.4-IAM-Policy-Change"
pattern = "{($.eventName=DeleteGroupPolicy)||($.eventName=DeleteRolePolicy)||($.eventName=DeleteUserPolicy)||($.eventName=PutGroupPolicy)||($.eventName=PutRolePolicy)||($.eventName=PutUserPolicy)||($.eventName=CreatePolicy)||($.eventName=DeletePolicy)||($.eventName=CreatePolicyVersion)||($.eventName=DeletePolicyVersion)||($.eventName=AttachRolePolicy)||($.eventName=DetachRolePolicy)||($.eventName=AttachUserPolicy)||($.eventName=DetachUserPolicy)||($.eventName=AttachGroupPolicy)||($.eventName=DetachGroupPolicy)}"
log_group_name = aws_cloudwatch_log_group.CIS_CloudWatch_LogsGroup.name
metric_transformation {
name = "CIS-4.4-IAM-Policy-Change"
namespace = "CIS_Metric_Alarm_Namespace"
value = "1"
}
}
Positive 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_iam_policy_change" {
alarm_name = "CIS-4.4-IAM-Policy-Change"
comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = "1"
metric_name = aws_cloudwatch_log_metric_filter.cis_iam_policy_change.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_iam_policy_change" {
name = "CIS-4.4-IAM-Policy-Change"
pattern = "{($.eventName=DeleteRolePolicy)||($.eventName=DeleteUserPolicy)||($.eventName=PutGroupPolicy)||($.eventName=PutRolePolicy)||($.eventName=PutUserPolicy)||($.eventName=CreatePolicy)||($.eventName=DeletePolicy)||($.eventName=CreatePolicyVersion)||($.eventName=DeletePolicyVersion)||($.eventName=AttachRolePolicy)||($.eventName=DetachRolePolicy)||($.eventName=AttachUserPolicy)||($.eventName=DetachUserPolicy)||($.eventName=AttachGroupPolicy)||($.eventName=DetachGroupPolicy)}"
log_group_name = aws_cloudwatch_log_group.CIS_CloudWatch_LogsGroup.name
metric_transformation {
name = "CIS-4.4-IAM-Policy-Change"
namespace = "CIS_Metric_Alarm_Namespace"
value = "1"
}
}
Code samples without security vulnerabilities¶
Negative test num. 1 - tf file
provider "aws" {
region = "us-east-2"
}
resource "aws_cloudwatch_log_group" "CIS_CloudWatch_LogsGroup" {
name = "CIS_CloudWatch_LogsGroup"
}
resource "aws_sns_topic" "cis_alerts_sns_topic" {
name = "cis-alerts-sns-topic"
}
resource "aws_cloudwatch_metric_alarm" "cis_iam_policy_change" {
alarm_name = "CIS-4.4-IAM-Policy-Change"
comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = "1"
metric_name = aws_cloudwatch_log_metric_filter.cis_iam_policy_change.id
namespace = "CIS_Metric_Alarm_Namespace"
period = "300"
statistic = "Sum"
threshold = "1"
alarm_actions = [aws_sns_topic.cis_alerts_sns_topic.arn]
insufficient_data_actions = []
}
resource "aws_cloudwatch_log_metric_filter" "cis_iam_policy_change" {
name = "CIS-4.4-IAM-Policy-Change"
pattern = "{($.eventName=DeleteGroupPolicy)||($.eventName=DeleteRolePolicy)||($.eventName=DeleteUserPolicy)||($.eventName=PutGroupPolicy)||($.eventName=PutRolePolicy)||($.eventName=PutUserPolicy)||($.eventName=CreatePolicy)||($.eventName=DeletePolicy)||($.eventName=CreatePolicyVersion)||($.eventName=DeletePolicyVersion)||($.eventName=AttachRolePolicy)||($.eventName=DetachRolePolicy)||($.eventName=AttachUserPolicy)||($.eventName=DetachUserPolicy)||($.eventName=AttachGroupPolicy)||($.eventName=DetachGroupPolicy)}"
log_group_name = aws_cloudwatch_log_group.CIS_CloudWatch_LogsGroup.name
metric_transformation {
name = "CIS-4.4-IAM-Policy-Change"
namespace = "CIS_Metric_Alarm_Namespace"
value = "1"
}
}