Cloudwatch Cloudtrail Configuration Changes Alarm Missing
- Query id: 0f6cbf69-41bb-47dc-93f3-3844640bf480
- Query name: Cloudwatch Cloudtrail Configuration Changes Alarm Missing
- Platform: Terraform
- Severity: Medium
- Category: Observability
- CWE: 778
- URL: Github
Description¶
Ensure a log metric filter and alarm exist for CloudTrail configuration changes
Documentation
Code samples¶
Code samples with security vulnerabilities¶
Positive test num. 1 - tf file
resource "aws_cloudwatch_log_metric_filter" "cis_cloudtrail_config_change_metric_filter" {
name = "CIS-CloudTrailChanges"
pattern = "{ ($.eventName = CreateTrail) || ($.eventName = UpdateTrail) || ($.eventName = DeleteTrail) || ($.eventName = StartLogging) || ($.eventName = StopLogging) }"
log_group_name = aws_cloudwatch_log_group.CIS_CloudWatch_LogsGroup.name
metric_transformation {
name = "CIS-CloudTrailChanges"
namespace = "CIS_Metric_Alarm_Namespace"
value = "1"
}
}
resource "aws_cloudwatch_metric_alarm" "cis_cloudtrail_config_change_cw_alarm" {
alarm_name = "CIS-3.5-CloudTrailChanges"
comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = "1"
metric_name = "XXXX NOT YOUR FILTER XXXX"
namespace = "CIS_Metric_Alarm_Namespace"
period = "300"
statistic = "Sum"
threshold = "1"
alarm_description = "Monitoring changes to CloudTrail's configuration will help ensure sustained visibility to activities performed in the AWS account."
alarm_actions = [aws_sns_topic.CIS_Alerts_SNS_Topic.arn]
insufficient_data_actions = []
}
Positive test num. 2 - tf file
resource "aws_cloudwatch_log_metric_filter" "cis_unauthorized_api_calls_metric_filter" {
name = "CIS-UnauthorizedAPICalls"
pattern = "{ ($.errorCode = \"*UnauthorizedOperation\") || ($.errorCode = \"AccessDenied*\") }"
log_group_name = aws_cloudwatch_log_group.CIS_CloudWatch_LogsGroup.name
metric_transformation {
name = "CIS-UnauthorizedAPICalls"
namespace = "CIS_Metric_Alarm_Namespace"
value = "1"
}
}
resource "aws_cloudwatch_metric_alarm" "cis_unauthorized_api_calls_cw_alarm" {
alarm_name = "CIS-3.1-UnauthorizedAPICalls"
comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = "1"
metric_name = aws_cloudwatch_log_metric_filter.cis_unauthorized_api_calls_metric_filter.id
namespace = "CIS_Metric_Alarm_Namespace"
period = "300"
statistic = "Sum"
threshold = "1"
alarm_description = "Monitoring unauthorized API calls will help reveal application errors and may reduce time to detect malicious activity."
alarm_actions = [aws_sns_topic.cis_alerts_sns_topic.arn]
insufficient_data_actions = []
}
Positive test num. 3 - tf file
resource "aws_cloudwatch_log_metric_filter" "cis_cloudtrail_config_change_metric_filter" {
name = "CIS-CloudTrailChanges"
pattern = "{ ($.eventName = CreateTrail) || ($.eventName = StartLogging) || ($.eventName = StopLogging) }"
log_group_name = aws_cloudwatch_log_group.CIS_CloudWatch_LogsGroup.name
metric_transformation {
name = "CIS-CloudTrailChanges"
namespace = "CIS_Metric_Alarm_Namespace"
value = "1"
}
}
resource "aws_cloudwatch_metric_alarm" "cis_cloudtrail_config_change_cw_alarm" {
alarm_name = "CIS-3.5-CloudTrailChanges"
comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = "1"
metric_name = aws_cloudwatch_log_metric_filter.cis_cloudtrail_config_change_metric_filter.id
namespace = "CIS_Metric_Alarm_Namespace"
period = "300"
statistic = "Sum"
threshold = "1"
alarm_description = "Monitoring changes to CloudTrail's configuration will help ensure sustained visibility to activities performed in the AWS account."
alarm_actions = [aws_sns_topic.CIS_Alerts_SNS_Topic.arn]
insufficient_data_actions = []
}
Code samples without security vulnerabilities¶
Negative test num. 1 - tf file
resource "aws_cloudwatch_log_metric_filter" "cis_cloudtrail_config_change_metric_filter" {
name = "CIS-CloudTrailChanges"
pattern = "{ ($.eventName = CreateTrail) || ($.eventName = UpdateTrail) || ($.eventName = DeleteTrail) || ($.eventName = StartLogging) || ($.eventName = StopLogging) }"
log_group_name = aws_cloudwatch_log_group.CIS_CloudWatch_LogsGroup.name
metric_transformation {
name = "CIS-CloudTrailChanges"
namespace = "CIS_Metric_Alarm_Namespace"
value = "1"
}
}
resource "aws_cloudwatch_metric_alarm" "cis_cloudtrail_config_change_cw_alarm" {
alarm_name = "CIS-3.5-CloudTrailChanges"
comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = "1"
metric_name = aws_cloudwatch_log_metric_filter.cis_cloudtrail_config_change_metric_filter.id
namespace = "CIS_Metric_Alarm_Namespace"
period = "300"
statistic = "Sum"
threshold = "1"
alarm_description = "Monitoring changes to CloudTrail's configuration will help ensure sustained visibility to activities performed in the AWS account."
alarm_actions = [aws_sns_topic.CIS_Alerts_SNS_Topic.arn]
insufficient_data_actions = []
}