added policy to check vpc default for ec2

avd_docs/aws/ec2/AVD-AWS-0183/docs.md

@@ -0,0 +1,13 @@
+
+Determines whether the default VPC exists.
+
+### Impact
+<!-- Add Impact here -->
+
+<!-- DO NOT CHANGE -->
+{{ remediationActions }}
+
+### Links
+- https://docs.aws.amazon.com/vpc/latest/userguide/default-vpc.html
+
+

avd_docs/kubernetes/general/AVD-KSV-0108/docs.md

@@ -2,8 +2,8 @@
 Services with external IP addresses allows direct access from the internet and might expose risk for CVE-2020-8554
 
 ### Impact
-Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.
-https://www.cvedetails.com/cve/CVE-2020-8554/
+<!-- Add Impact here -->
+
 <!-- DO NOT CHANGE -->
 {{ remediationActions }}
 

internal/rules/policies/cloud/policies/aws/ec2/no_default_vpc.rego

@@ -0,0 +1,25 @@
+# METADATA
+# title: "Default VPC Exists"
+# description: "Determines whether the default VPC exists."
+# scope: package
+# schemas:
+# - input: schema.input
+# related_resources:
+# - https://docs.aws.amazon.com/vpc/latest/userguide/default-vpc.html
+# custom:
+#   avd_id: AVD-AWS-0183
+#   provider: aws
+#   service: ec2
+#   severity: HIGH
+#   short_code: no-default-vpc
+#   recommended_action: "Move resources from the default VPC to a new VPC created for that application or resource group."
+#   input:
+#     selector:
+#     - type: cloud
+package builtin.aws.ec2.aws0183
+
+deny[res] {
+	def := input.aws.ec2.vpcs[_]
+	def.isdefault.value
+	res := result.new("Default VPC is used.", def.isdefault)
+}

internal/rules/policies/cloud/policies/aws/ec2/no_default_vpc_test.rego

@@ -0,0 +1,11 @@
+package builtin.aws.ec2.aws0183
+
+test_detects_when_not_default{
+	r := deny with input as {"aws": {"ec2": {"vpcs": [{"isdefault": {"value": false}}]}}}
+	count(r) == 0
+}
+
+test_when_default {
+	r := deny with input as {"aws": {"ec2": {"vpcs": [{"isdefault": {"value": true}}]}}}
+	count(r) == 1
+}