Files
prowler/checks/check_extra741
Marc Jay 5bab65c56d - Remove securityhub output mode and replace with '-S' flag to send findings to Security Hub
- Move Security Hub related code to a dedicated include/securityhub_integration file
- Check that Security Hub is enabled in the target region before beginning checks when -S is specified
- Add error handling to the batch-import-findings call
- Add CHECK_ASFF_TYPE variables to all CIS checks to override the default
- Add support for CHECK_ASFF_RESOURCE_TYPE variables which override the default 'AwsAccount' value for the resource a finding relates to.
- Add CHECK_ASFF_RESOURCE_TYPE variables to all checks where there is a suitable value in the schema
- Remove json-asff output for info messages as they are not appropriate for possible submission to Security Hub
- Update the README to cover Security Hub integration
- Add an IAM policy JSON document that provides the necessary BatchImportFindings permission for Security Hub
- Remove trailing whitespace and periods in pass/fail messages to be consistent with the majority of messages, to prevent future tidy-up from changing the finding IDs
2020-04-11 03:04:03 +01:00

70 lines
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#!/usr/bin/env bash
# Prowler - the handy cloud security tool (copyright 2019) by Toni de la Fuente
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy
# of the License at http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software distributed
# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
# CONDITIONS OF ANY KIND, either express or implied. See the License for the
# specific language governing permissions and limitations under the License.
CHECK_ID_extra741="7.41"
CHECK_TITLE_extra741="[extra741] Find secrets in EC2 User Data (Not Scored) (Not part of CIS benchmark)"
CHECK_SCORED_extra741="NOT_SCORED"
CHECK_TYPE_extra741="EXTRA"
CHECK_ASFF_RESOURCE_TYPE_extra741="AwsEc2Instance"
CHECK_ALTERNATE_check741="extra741"
extra741(){
SECRETS_TEMP_FOLDER="$PROWLER_DIR/secrets-$ACCOUNT_NUM"
if [[ ! -d $SECRETS_TEMP_FOLDER ]]; then
# this folder is deleted once this check is finished
mkdir $SECRETS_TEMP_FOLDER
fi
textInfo "Looking for secrets in EC2 User Data in instances across all regions... (max 100 instances per region use -m to increase it) "
for regx in $REGIONS; do
LIST_OF_EC2_INSTANCES=$($AWSCLI ec2 describe-instances $PROFILE_OPT --region $regx --query Reservations[*].Instances[*].InstanceId --output text --max-items $MAXITEMS | grep -v None)
if [[ $LIST_OF_EC2_INSTANCES ]];then
for instance in $LIST_OF_EC2_INSTANCES; do
EC2_USERDATA_FILE="$SECRETS_TEMP_FOLDER/extra741-$instance-userData.decoded"
EC2_USERDATA=$($AWSCLI ec2 describe-instance-attribute --attribute userData $PROFILE_OPT --region $regx --instance-id $instance --query UserData.Value --output text| grep -v ^None | decode_report > $EC2_USERDATA_FILE)
if [ -s $EC2_USERDATA_FILE ];then
FILE_FORMAT_ASCII=$(file -b $EC2_USERDATA_FILE|grep ASCII)
# This finds ftp or http URLs with credentials and common keywords
# FINDINGS=$(egrep -i '[[:alpha:]]*://[[:alnum:]]*:[[:alnum:]]*@.*/|key|secret|token|pass' $EC2_USERDATA_FILE |wc -l|tr -d '\ ')
# New implementation using https://github.com/Yelp/detect-secrets
if [[ $FILE_FORMAT_ASCII ]]; then
FINDINGS=$(secretsDetector file $EC2_USERDATA_FILE)
if [[ $FINDINGS -eq 0 ]]; then
textPass "$regx: No secrets found in $instance" "$regx"
# delete file if nothing interesting is there
rm -f $EC2_USERDATA_FILE
else
textFail "$regx: Potential secret found in $instance" "$regx"
# delete file to not leave trace, user must look at the instance User Data
rm -f $EC2_USERDATA_FILE
fi
else
mv $EC2_USERDATA_FILE $EC2_USERDATA_FILE.gz ; gunzip $EC2_USERDATA_FILE.gz
FINDINGS=$(secretsDetector file $EC2_USERDATA_FILE)
if [[ $FINDINGS -eq 0 ]]; then
textPass "$regx: No secrets found in $instance User Data" "$regx"
rm -f $EC2_USERDATA_FILE
else
textFail "$regx: Potential secret found in $instance" "$regx"
fi
fi
else
textPass "$regx: No secrets found in $instance User Data or it is empty" "$regx"
fi
done
else
textInfo "$regx: No EC2 instances found" "$regx"
fi
done
rm -rf $SECRETS_TEMP_FOLDER
}