mirror of
https://github.com/ghndrx/prowler.git
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67 lines
3.6 KiB
Bash
67 lines
3.6 KiB
Bash
#!/usr/bin/env bash
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# Prowler - the handy cloud security tool (copyright 2019) by Toni de la Fuente
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy
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# of the License at http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software distributed
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# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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# CONDITIONS OF ANY KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations under the License.
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CHECK_ID_extra741="7.41"
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CHECK_TITLE_extra741="[extra741] Find secrets in EC2 User Data"
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CHECK_SCORED_extra741="NOT_SCORED"
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CHECK_TYPE_extra741="EXTRA"
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CHECK_SEVERITY_extra741="Critical"
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CHECK_ASFF_RESOURCE_TYPE_extra741="AwsEc2Instance"
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CHECK_ALTERNATE_check741="extra741"
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CHECK_SERVICENAME_extra741="ec2"
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CHECK_RISK_extra741='Secrets hardcoded into instance user data can be used by malware and bad actors to gain lateral access to other services.'
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CHECK_REMEDIATION_extra741='Implement automated detective control (e.g. using tools like Prowler ) to scan accounts for passwords and secrets. Use secrets manager service to store and retrieve passwords and secrets. '
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CHECK_DOC_extra741='https://docs.aws.amazon.com/secretsmanager/latest/userguide/tutorials_basic.html'
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CHECK_CAF_EPIC_extra741='IAM'
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extra741(){
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SECRETS_TEMP_FOLDER="$PROWLER_DIR/secrets-$ACCOUNT_NUM"
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if [[ ! -d $SECRETS_TEMP_FOLDER ]]; then
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# this folder is deleted once this check is finished
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mkdir $SECRETS_TEMP_FOLDER
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fi
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for regx in $REGIONS; do
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LIST_OF_EC2_INSTANCES=$($AWSCLI ec2 describe-instances $PROFILE_OPT --region $regx --query Reservations[*].Instances[*].InstanceId --output text --max-items $MAXITEMS | grep -v None)
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if [[ $LIST_OF_EC2_INSTANCES ]];then
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for instance in $LIST_OF_EC2_INSTANCES; do
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EC2_USERDATA_FILE="$SECRETS_TEMP_FOLDER/extra741-$instance-userData.decoded"
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EC2_USERDATA=$($AWSCLI ec2 describe-instance-attribute --attribute userData $PROFILE_OPT --region $regx --instance-id $instance --query UserData.Value --output text| grep -v ^None | decode_report > $EC2_USERDATA_FILE)
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if [ -s "$EC2_USERDATA_FILE" ];then
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# This finds ftp or http URLs with credentials and common keywords
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# FINDINGS=$(egrep -i '[[:alpha:]]*://[[:alnum:]]*:[[:alnum:]]*@.*/|key|secret|token|pass' $EC2_USERDATA_FILE |wc -l|tr -d '\ ')
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# New implementation using https://github.com/Yelp/detect-secrets
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# Test if user data is a valid GZIP file, if so gunzip first
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if gunzip -t "$EC2_USERDATA_FILE" > /dev/null 2>&1; then
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mv "$EC2_USERDATA_FILE" "$EC2_USERDATA_FILE.gz" ; gunzip "$EC2_USERDATA_FILE.gz"
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fi
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FINDINGS=$(secretsDetector file "$EC2_USERDATA_FILE")
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if [[ $FINDINGS -eq 0 ]]; then
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textPass "$regx: No secrets found in $instance User Data" "$regx" "$instance"
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# delete file if nothing interesting is there
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rm -f "$EC2_USERDATA_FILE"
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else
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textFail "$regx: Potential secret found in $instance User Data" "$regx" "$regx" "$instance"
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# delete file to not leave trace, user must look at the instance User Data
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rm -f "$EC2_USERDATA_FILE"
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fi
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else
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textPass "$regx: No secrets found in $instance User Data or it is empty" "$regx" "$instance"
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fi
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done
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else
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textInfo "$regx: No EC2 instances found" "$regx"
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fi
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done
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rm -rf $SECRETS_TEMP_FOLDER
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}
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