Adding custom security checks

This commit is contained in:
Patel
2021-06-14 12:43:21 +05:30
parent 583cffaefb
commit 8e9ef841e5
5 changed files with 217 additions and 0 deletions

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#!/usr/bin/env bash
# Prowler - the handy cloud security tool (copyright 2018) 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_extra91="9.1"
CHECK_TITLE_extra91="[extra91] Check if S3 glacier vaults have policies which allow access to everyone (Not Scored) (Not part of CIS benchmark) (Custom Check)"
CHECK_SCORED_extra91="NOT_SCORED"
CHECK_TYPE_extra91="EXTRA"
CHECK_SEVERITY_extra91="Critical"
CHECK_ASFF_RESOURCE_TYPE_extra91="AwsS3Glacier"
CHECK_ALTERNATE_check91="extra91"
CHECK_SERVICENAME_extra91="s3Glacier"
# If an s3 glacier vault has a policy principle as *, we consider it public accessible resource.
extra91(){
for region in $REGIONS; do
LIST_OF_VAULTS=$($AWSCLI glacier list-vaults $PROFILE_OPT --region $region --account-id $ACCOUNT_NUM --query VaultList[*].VaultName --output text|xargs -n1)
if [[ $LIST_OF_VAULTS ]]; then
for vault in $LIST_OF_VAULTS;do
VAULT_POLICY_STATEMENTS=$($AWSCLI glacier $PROFILE_OPT get-vault-access-policy --region $region --account-id $ACCOUNT_NUM --vault-name $vault --output json --query policy.Policy 2>&1)
if [[ $VAULT_POLICY_STATEMENTS == *GetVaultAccessPolicy* ]]; then
textInfo "Vault policy does not exist for vault $vault"
else
VAULT_POLICY_BAD_STATEMENTS=$(echo $VAULT_POLICY_STATEMENTS | jq '. | fromjson' | jq '.Statement[] | select(.Effect=="Allow") | select(.Principal=="*" or .Principal.AWS=="*" or .Principal.CanonicalUser=="*")')
if [[ $VAULT_POLICY_BAD_STATEMENTS != "" ]]; then
textFail "$region : Vault $vault allows public access with policy as: $VAULT_POLICY_BAD_STATEMENTS"
else
textPass "$region :Vault $vault has vault policy which does not allow public access"
fi
fi
done
else
textInfo "No glacier vaults found in $region region"
fi
done
}

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#!/usr/bin/env bash
# Prowler - the handy cloud security tool (copyright 2018) 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_extra92="9.2"
CHECK_TITLE_extra92="[extra92] Check if EFS have policies which allow access to everyone (Not Scored) (Not part of CIS benchmark) (Custom Check)"
CHECK_SCORED_extra92="NOT_SCORED"
CHECK_TYPE_extra92="EXTRA"
CHECK_SEVERITY_extra92="Critical"
CHECK_ASFF_RESOURCE_TYPE_extra92="AwsEFS"
CHECK_ALTERNATE_check92="extra92"
CHECK_SERVICENAME_extra92="EFS"
# If an EFS has a policy principle as *, we consider it as public accessible even though client connects through a vpc peering or transit gateway. Also if EFS has a default policy(no user defined
# policy), it's also a security risk, as default policy grants full access to any client that can connect to the file system using a file system mount target.
extra92(){
for region in $REGIONS; do
LIST_OF_EFS_IDS=$($AWSCLI efs describe-file-systems $PROFILE_OPT --region $region --query FileSystems[*].FileSystemId --output text|xargs -n1)
if [[ $LIST_OF_EFS_IDS ]]; then
for efsId in $LIST_OF_EFS_IDS;do
EFS_POLICY_STATEMENTS=$($AWSCLI efs $PROFILE_OPT describe-file-system-policy --region $region --file-system-id $efsId --output json --query Policy 2>&1)
if [[ $EFS_POLICY_STATEMENTS == *PolicyNotFound* ]]; then
textFail "$region : EFS $efsId doesn't have any policy which means it grants full access to any client"
# textInfo "EFS policy does not exist for efs id $efsId"
else
EFS_POLICY_BAD_STATEMENTS=$(echo $EFS_POLICY_STATEMENTS | jq '. | fromjson' | jq '.Statement[] | select(.Effect=="Allow") | select(.Principal=="*" or .Principal.AWS=="*" or .Principal.CanonicalUser=="*")')
if [[ $EFS_POLICY_BAD_STATEMENTS != "" ]]; then
textFail "$region : EFS $efsId allows public access with policy as: $EFS_POLICY_BAD_STATEMENTS"
else
textPass "$region : EFS $efsId has file system policy which does not allow public access"
fi
fi
done
else
textInfo "No EFS found in $region region"
fi
done
}

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#!/usr/bin/env bash
# Prowler - the handy cloud security tool (copyright 2018) 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_extra93="9.3"
CHECK_TITLE_extra93="[extra93] Check if aws cloudwatch has allowed sharing with other accounts (Not Scored) (Not part of CIS benchmark) (Custom Check)"
CHECK_SCORED_extra93="NOT_SCORED"
CHECK_TYPE_extra93="EXTRA"
CHECK_SEVERITY_extra93="Critical"
CHECK_ASFF_RESOURCE_TYPE_extra93="AwsCloudWatch"
CHECK_ALTERNATE_check93="extra93"
CHECK_SERVICENAME_extra93="CloudWatch"
# When CloudWatch allows cross account sharing, a role with name CloudWatch-CrossAccountSharingRole get's created by aws itself. So we are validating role name existance for checking the
# cloudwatch security.
extra93(){
CLOUDWATCH_CROSS_ACCOUNT_ROLE=$($AWSCLI iam get-role $PROFILE_OPT --role-name=CloudWatch-CrossAccountSharingRole --output json --query Role 2>&1)
if [[ $CLOUDWATCH_CROSS_ACCOUNT_ROLE != *NoSuchEntity* ]]; then
CLOUDWATCH_POLICY_BAD_STATEMENTS=$(echo $CLOUDWATCH_CROSS_ACCOUNT_ROLE | jq '.AssumeRolePolicyDocument')
textFail "Cloudwatch has allowed cross account sharing with policy as $CLOUDWATCH_POLICY_BAD_STATEMENTS"
else
textPass "CloudWatch doesn't allows cross account sharing"
fi
}

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#!/usr/bin/env bash
# Prowler - the handy cloud security tool (copyright 2018) 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_extra94="9.4"
CHECK_TITLE_extra94="[extra94] Check if lambda functions has policies which allow access to everyone having an aws account (Not Scored) (Not part of CIS benchmark) (Custom Check)"
CHECK_SCORED_extra94="NOT_SCORED"
CHECK_TYPE_extra94="EXTRA"
CHECK_SEVERITY_extra94="Critical"
CHECK_ASFF_RESOURCE_TYPE_extra94="AwsCloudWatch"
CHECK_ALTERNATE_check94="extra94"
CHECK_SERVICENAME_extra94="CloudWatch"
# If a lambda function has a policy principle as *, It can be accessed by any aws account. We consider such functions as publicly accessible resource.
extra94(){
for region in $REGIONS; do
LIST_OF_LAMBDA_FUNCTIONS=$($AWSCLI lambda list-functions $PROFILE_OPT --region $region --query Functions[*].FunctionName --output text)
if [[ $LIST_OF_LAMBDA_FUNCTIONS ]]; then
for lambdaFunction in $LIST_OF_LAMBDA_FUNCTIONS;do
FUNCTION_POLICY_STATEMENTS=$($AWSCLI lambda $PROFILE_OPT get-policy --region $region --function-name $lambdaFunction --output json --query Policy 2>&1)
if [[ $FUNCTION_POLICY_STATEMENTS == *ResourceNotFoundException* ]]; then
textInfo "$region : Lambda function $lambdaFunction doesn't have any policy"
else
FUNCTION_POLICY_BAD_STATEMENTS=$(echo $FUNCTION_POLICY_STATEMENTS | jq '. | fromjson' | jq '.Statement[] | select(.Effect=="Allow") | select(.Principal=="*" or .Principal.AWS=="*" or .Principal.CanonicalUser=="*")')
if [[ $FUNCTION_POLICY_BAD_STATEMENTS != "" ]]; then
textFail "$region : Lambda function $lambdaFunction allows public access with policy as: $FUNCTION_POLICY_BAD_STATEMENTS"
else
textPass "$region : Lambda function $lambdaFunction has policy which doesn't allow access to everyone having an aws account"
fi
fi
done
else
textInfo "No lambda functions found in $region region"
fi
done
}

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#!/usr/bin/env bash
# Prowler - the handy cloud security tool (copyright 2018) 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_extra95="9.5"
CHECK_TITLE_extra95="[extra95] Check if there is any unassigned elastic ip's (Not Scored) (Not part of CIS benchmark) (Custom Check)"
CHECK_SCORED_extra95="NOT_SCORED"
CHECK_TYPE_extra95="EXTRA"
CHECK_SEVERITY_extra95="Critical"
CHECK_ASFF_RESOURCE_TYPE_extra95="AwsCloudWatch"
CHECK_ALTERNATE_check95="extra95"
CHECK_SERVICENAME_extra95="CloudWatch"
# If there is any elasting ip which is not assigned to any instance or network interface, we will list that out.
extra95(){
for region in $REGIONS; do
ELASTIC_IP_ADDRESSES=$($AWSCLI ec2 describe-addresses $PROFILE_OPT --region $region --query Addresses --output json)
if [[ $ELASTIC_IP_ADDRESSES != [] ]]; then
LIST_OF_ASSOCIATED_IPS=$(echo $ELASTIC_IP_ADDRESSES | jq -r '.[] | select(.AssociationId!=null) | .PublicIp')
LIST_OF_UNASSOCIATED_IPS=$(echo $ELASTIC_IP_ADDRESSES | jq -r '.[] | select(.AssociationId==null) | .PublicIp')
for ass_ip in $LIST_OF_ASSOCIATED_IPS; do
textPass "$region : Elastic IP $ass_ip is associated with an instance or network interface"
done
for unass_ip in $LIST_OF_UNASSOCIATED_IPS; do
textInfo "$region : Elastic IP $unass_ip is not associated with any instance or network interface, it may incurr cost"
done
else
textInfo "No elastic ip's found in region $region"
fi
done
}