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cis-4.1.1-compute-instance-default-service-account.sh
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cis-4.1.1-compute-instance-default-service-account.sh
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#!/bin/bash
source functions.inc
declare SEPARATOR="---------------------------------------------------------------------------------";
declare PROJECT_IDS="";
declare DEBUG="False";
declare CSV="False";
declare ICH="False";
declare HELP=$(cat << EOL
$0 [-p, --project PROJECT] [-c, --csv] [-d, --debug] [-h, --help]
EOL
);
for arg in "$@"; do
shift
case "$arg" in
"--help") set -- "$@" "-h" ;;
"--debug") set -- "$@" "-d" ;;
"--csv") set -- "$@" "-c" ;;
"--project") set -- "$@" "-p" ;;
*) set -- "$@" "$arg"
esac
done
while getopts "hdcip:" option
do
case "${option}"
in
p)
PROJECT_IDS=${OPTARG};;
d)
DEBUG="True";;
c)
CSV="True";;
h)
echo $HELP;
exit 0;;
esac;
done;
if [[ $PROJECT_IDS == "" ]]; then
declare PROJECT_IDS=$(get_projects);
fi;
if [[ $DEBUG == "True" ]]; then
echo "Projects: $PROJECT_IDS";
echo "";
fi;
if [[ $CSV == "True" ]]; then
echo "\"PROJECT_ID\", \"PROJECT_NAME\", \"PROJECT_OWNER\", \"PROJECT_APPLICATION\", \"INSTANCE_NAME\", \"SERVICE_ACCOUNTS\", \"IS_SA_VIOLATION\", \"IS_ROLE_VIOLATION\", \"ROLES\", \"ROLES_STATUS_MESSAGE\", \"SERVICE_ACCOUNT_STATUS_MESSAGE\", \"SCOPES\"";
fi;
for PROJECT_ID in $PROJECT_IDS; do
set_project $PROJECT_ID;
if ! api_enabled compute.googleapis.com; then
if [[ $CSV != "True" ]]; then
echo "Compute Engine API is not enabled on Project $PROJECT_ID";
fi;
continue;
fi;
declare INSTANCES=$( gcloud compute instances list --quiet --format="json");
if [[ $DEBUG == "True" ]]; then
echo "Instances (JSON): $INSTANCES";
echo "";
fi;
if [[ $INSTANCES != "[]" ]]; then
#Get project details
get_project_details $PROJECT_ID
echo $INSTANCES | jq -rc '.[]' | while IFS='' read -r INSTANCE;do
if [[ $DEBUG == "True" ]]; then
echo "Project Name: $PROJECT_NAME";
echo "Project Application: $PROJECT_APPLICATION";
echo "Project Owner: $PROJECT_OWNER";
echo "Instance (JSON): $INSTANCE";
fi;
INSTANCE_NAME=$(echo $INSTANCE | jq -rc '.name');
SERVICE_ACCOUNTS=$(echo $INSTANCE | jq -rc '.serviceAccounts[].email');
IS_GKE_NODE=$(echo $INSTANCE | jq '.labels' | jq 'has("goog-gke-node")');
SCOPES=$(echo $INSTANCE | jq -rc '.serviceAccounts[].scopes[]');
ROLES=$(gcloud projects get-iam-policy $PROJECT_ID --flatten="bindings[].members" --filter="bindings.members:$SERVICE_ACCOUNTS" --format="json" | jq '.[]' | jq '.bindings.role');
# Determine if the default service account is in use
if [[ $SERVICE_ACCOUNTS =~ [-]compute[@]developer[.]gserviceaccount[.]com && $IS_GKE_NODE == "false" ]]; then
IS_SA_VIOLATION="True";
SERVICE_ACCOUNT_STATUS_MESSAGE="VIOLATION: Default Service Account detected";
else
IS_SA_VIOLATION="False";
SERVICE_ACCOUNT_STATUS_MESSAGE="NOTICE: Custom Service Account Detected";
fi;
if [[ $ROLES =~ editor ]]; then
IS_ROLE_VIOLATION="True";
ROLES_STATUS_MESSAGE="VIOLATION: Service account has Editor permission";
else
IS_ROLE_VIOLATION="False";
ROLES_STATUS_MESSAGE="NOTICE: Service account has custom permissions";
fi;
if [[ $CSV != "True" ]]; then
echo "Project ID: $PROJECT_ID";
echo "Project Name: $PROJECT_NAME";
echo "Project Application: $PROJECT_APPLICATION";
echo "Project Owner: $PROJECT_OWNER";
echo "Instance Name: $INSTANCE_NAME";
echo "Service Accounts: $SERVICE_ACCOUNTS";
echo "Status: $SERVICE_ACCOUNT_STATUS_MESSAGE";
echo "Google OAuth Scopes:";
echo $SCOPES;
echo "Roles: $ROLES";
echo "$ROLES_STATUS_MESSAGE";
echo "";
else
echo "\"$PROJECT_ID\", \"$PROJECT_NAME\", \"$PROJECT_OWNER\", \"$PROJECT_APPLICATION\", \"$INSTANCE_NAME\", \"$SERVICE_ACCOUNTS\", \"$IS_SA_VIOLATION\", \"$IS_ROLE_VIOLATION\", \"$ROLES\", \"$ROLES_STATUS_MESSAGE\", \"$SERVICE_ACCOUNT_STATUS_MESSAGE\", \"$SCOPES\"";
fi;
done;
else
if [[ $CSV != "True" ]]; then
echo "No instances found for project $PROJECT_ID";
echo "";
fi;
fi;
sleep 0.5;
done;