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39 lines
2.1 KiB
Bash
39 lines
2.1 KiB
Bash
#!/usr/bin/env bash
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# Prowler - the handy cloud security tool (c) by Toni de la Fuente
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#
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# This Prowler check is licensed under a
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# Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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#
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# You should have received a copy of the license along with this
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# work. If not, see <http://creativecommons.org/licenses/by-nc-sa/4.0/>.
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CHECK_ID_check310="3.10"
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CHECK_TITLE_check310="[check310] Ensure a log metric filter and alarm exist for security group changes (Scored)"
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CHECK_SCORED_check310="SCORED"
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CHECK_ALTERNATE_check310="check310"
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check310(){
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# "Ensure a log metric filter and alarm exist for security group changes (Scored)"
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CLOUDWATCH_GROUP=$($AWSCLI cloudtrail describe-trails $PROFILE_OPT --region $REGION --query 'trailList[*].CloudWatchLogsLogGroupArn' --output text | tr ' ' '
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' | awk -F: '{ print $7 }')
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if [[ $CLOUDWATCH_GROUP ]];then
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for group in $CLOUDWATCH_GROUP; do
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CLOUDWATCH_LOGGROUP_REGION=$($AWSCLI cloudtrail describe-trails $PROFILE_OPT --region $REGION --query 'trailList[*].CloudWatchLogsLogGroupArn' --output text | awk -F: '{ print $4 }')
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METRICFILTER_SET=$($AWSCLI logs describe-metric-filters --log-group-name $group $PROFILE_OPT --region $CLOUDWATCH_LOGGROUP_REGION --query 'metricFilters' | grep -E 'AuthorizeSecurityGroupIngress.*AuthorizeSecurityGroupEgress.*RevokeSecurityGroupIngress.*RevokeSecurityGroupEgress.*CreateSecurityGroup.*DeleteSecurityGroup')
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if [[ $METRICFILTER_SET ]];then
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HAS_ALARM_ASSOCIATED=$($AWSCLI cloudwatch describe-alarms $PROFILE_OPT --region $CLOUDWATCH_LOGGROUP_REGION --query 'MetricAlarms[].MetricName' --output text | awk 'BEGIN {IGNORECASE=1}; /SecurityGroup/;')
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if [[ $HAS_ALARM_ASSOCIATED ]];then
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textPass "CloudWatch group $group found with metric filters and alarms for security group changes"
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else
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textFail "CloudWatch group $group found with metric filters but no alarms associated"
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fi
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else
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textFail "CloudWatch group $group found but no metric filters or alarms associated"
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fi
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done
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else
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textFail "No CloudWatch group found for CloudTrail events"
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fi
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}
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