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Added [extra798] Check if Lambda functions have resource-based policy set as Public

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Toni de la Fuente
2020-08-25 19:06:06 +02:00
parent 03b1d898a6
commit ca471700c2
3 changed files with 46 additions and 2 deletions
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44
checks/check_extra798 Normal file
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@@ -0,0 +1,44 @@
#!/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_extra798="7.98"
CHECK_TITLE_extra798="[extra798] Check if Lambda functions have resource-based policy set as Public"
CHECK_SCORED_extra798="NOT_SCORED"
CHECK_TYPE_extra798="EXTRA"
CHECK_ASFF_RESOURCE_TYPE_extra798="AwsLambdaFunction"
CHECK_ALTERNATE_check798="extra798"
extra798(){
for regx in $REGIONS; do
LIST_OF_FUNCTIONS=$($AWSCLI lambda list-functions $PROFILE_OPT --region $regx --output text --query 'Functions[*].FunctionName')
if [[ $LIST_OF_FUNCTIONS ]]; then
for lambdafunction in $LIST_OF_FUNCTIONS; do
# get the policy per function
FUNCTION_POLICY=$($AWSCLI lambda get-policy $PROFILE_OPT --region $regx --function-name $lambdafunction --query Policy --output text 2>/dev/null)
if [[ $FUNCTION_POLICY ]]; then
FUNCTION_POLICY_ALLOW_ALL=$(echo $FUNCTION_POLICY \
| jq '.Statement[] | select(.Effect=="Allow") | select(.Principal=="*" or .Principal.AWS=="*" or .Principal.CanonicalUser=="*")')
if [[ $FUNCTION_POLICY_ALLOW_ALL ]]; then
textFail "$regx: Lambda function $lambdafunction has a policy with public access" "$regx"
else
textPass "$regx: Lambda function $lambdafunction has a policy resource-based policy and is not public" "$regx"
fi
else
textPass "$regx: Lambda function $lambdafunction does not have resource-based policy" "$regx"
fi
done
else
textInfo "$regx: No Lambda functions found" "$regx"
fi
done
}

2
groups/group17_internetexposed
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@@ -15,7 +15,7 @@ GROUP_ID[17]='internet-exposed'
GROUP_NUMBER[17]='17.0'
GROUP_TITLE[17]='Find resources exposed to the internet - [internet-exposed] *******'
GROUP_RUN_BY_DEFAULT[17]='N' # run it when execute_all is called
GROUP_CHECKS[17]='check41,check42,extra72,extra73,extra74,extra76,extra77,extra78,extra79,extra710,extra711,extra716,extra723,extra727,extra731,extra738,extra745,extra748,extra749,extra750,extra751,extra752,extra753,extra754,extra755,extra756,extra770,extra771,extra778,extra779,extra787,extra788'
GROUP_CHECKS[17]='check41,check42,extra72,extra73,extra74,extra76,extra77,extra78,extra79,extra710,extra711,extra716,extra723,extra727,extra731,extra738,extra745,extra748,extra749,extra750,extra751,extra752,extra753,extra754,extra755,extra756,extra770,extra771,extra778,extra779,extra787,extra788,extra798'
# 4.1 [check41] Ensure no security groups allow ingress from 0.0.0.0/0 or ::/0 to port 22 (Scored) [group4, cislevel1, cislevel2]
# 4.2 [check42] Ensure no security groups allow ingress from 0.0.0.0/0 or ::/0 to port 3389 (Scored) [group4, cislevel1, cislevel2]

2
groups/group7_extras
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@@ -15,7 +15,7 @@ GROUP_ID[7]='extras'
GROUP_NUMBER[7]='7.0'
GROUP_TITLE[7]='Extras - all non CIS specific checks - [extras] ****************'
GROUP_RUN_BY_DEFAULT[7]='Y' # run it when execute_all is called
GROUP_CHECKS[7]='extra71,extra72,extra73,extra74,extra75,extra76,extra77,extra78,extra79,extra710,extra711,extra712,extra713,extra714,extra715,extra716,extra717,extra718,extra719,extra720,extra721,extra722,extra723,extra724,extra725,extra726,extra727,extra728,extra729,extra730,extra731,extra732,extra733,extra734,extra735,extra736,extra737,extra738,extra739,extra740,extra741,extra742,extra743,extra744,extra745,extra746,extra747,extra748,extra749,extra750,extra751,extra752,extra753,extra754,extra755,extra756,extra757,extra758,extra761,extra762,extra763,extra764,extra765,extra767,extra768,extra769,extra770,extra771,extra772,extra773,extra774,extra775,extra776,extra777,extra778,extra779,extra780,extra781,extra782,extra783,extra784,extra785,extra786,extra787,extra788,extra791,extra792,extra793,extra794,extra795,extra796,extra797'
GROUP_CHECKS[7]='extra71,extra72,extra73,extra74,extra75,extra76,extra77,extra78,extra79,extra710,extra711,extra712,extra713,extra714,extra715,extra716,extra717,extra718,extra719,extra720,extra721,extra722,extra723,extra724,extra725,extra726,extra727,extra728,extra729,extra730,extra731,extra732,extra733,extra734,extra735,extra736,extra737,extra738,extra739,extra740,extra741,extra742,extra743,extra744,extra745,extra746,extra747,extra748,extra749,extra750,extra751,extra752,extra753,extra754,extra755,extra756,extra757,extra758,extra761,extra762,extra763,extra764,extra765,extra767,extra768,extra769,extra770,extra771,extra772,extra773,extra774,extra775,extra776,extra777,extra778,extra779,extra780,extra781,extra782,extra783,extra784,extra785,extra786,extra787,extra788,extra791,extra792,extra793,extra794,extra795,extra796,extra797,extra798'
# Extras 759 and 760 (lambda variables and code secrets finder are not included)
# to run detect-secrets use `./prowler -g secrets`