🧠 Azure Network Security Group allows public access to DNS port - prod.logic.yaml 🟢

• Contextual name: 🧠 prod.logic.yaml 🟢
• ID: /ce/ca/azure/virtual-network/security-group-allows-unrestricted-dns-traffic/prod.logic.yaml
• Located in: 📝 Azure Network Security Group allows public access to DNS port 🟢

Flags

• 🟢 Logic test success
• 🟢 Logic with extracts
• 🟢 Logic with test data

Input Type

	Type	API Name	Extracts	Extract Files	Logic Files
🔒	📕 Azure Network Security Group	CA10__CaAzureNetworkSecurityGroup__c	3	1	17

Uses

• 🔌 Azure Network Security Group Rule - object.extracts.yaml
• 🧪 test-data.json

Test Results 🟢

Generated at: 2025-05-10T12:04:18.487039472Z Open

Result	Id	Condition Index	Condition Text	Runtime Error
🟢	test1	✔️ 99	✔️ isDisappeared(CA10__disappearanceTime__c)	✔️ null
🟢	test2	✔️ 199	✔️ CA10__Azure_Network_Interfaces__r.has(COMPLIANT)	✔️ null
🟢	test3	✔️ 299	✔️ CA10Z1__Azure_VM_Scale_Set_Instance_Network_Ints__r.has(COMPLIANT)	✔️ null
🟢	test4	✔️ 399	✔️ CA10__Azure_Network_Security_Group_Rules__r.has(INCOMPLIANT)	✔️ null
🟢	test5	✔️ 400	✔️ otherwise	✔️ null

Generation

	File	MD5
Open	/ce/ca/azure/virtual-network/security-group-allows-unrestricted-dns-traffic/policy.yaml	7F62A818DF1B2B804DB068113D5F7E00
Open	/ce/ca/azure/virtual-network/security-group-allows-unrestricted-dns-traffic/prod.logic.yaml	9CEC8041ABB47B87EB99741A93245946
Open	/types/CA10__CaAzureNetworkSecurityGroupRule__c/object.extracts.yaml	A60C817EFBC8F066D6D082898E8597BC
Open	/ce/ca/azure/virtual-network/security-group-allows-unrestricted-dns-traffic/test-data.json	0E679173B3D498C5A03E82E2946357CA

Generate FULL script

java -jar repo-manager.jar policies generate FULL /ce/ca/azure/virtual-network/security-group-allows-unrestricted-dns-traffic/prod.logic.yaml

Generate DEBUG script

java -jar repo-manager.jar policies generate DEBUG /ce/ca/azure/virtual-network/security-group-allows-unrestricted-dns-traffic/prod.logic.yaml

Generate CAPTURE_TEST_DATA script

java -jar repo-manager.jar policies generate CAPTURE_TEST_DATA /ce/ca/azure/virtual-network/security-group-allows-unrestricted-dns-traffic/prod.logic.yaml

Generate TESTS script

java -jar repo-manager.jar policies generate TESTS /ce/ca/azure/virtual-network/security-group-allows-unrestricted-dns-traffic/prod.logic.yaml

Execute tests

java -jar repo-manager.jar policies test /ce/ca/azure/virtual-network/security-group-allows-unrestricted-dns-traffic/prod.logic.yaml

Content

Open File

---
inputType: "CA10__CaAzureNetworkSecurityGroup__c"
testData:
  - file: "test-data.json"
conditions:
  # This check identifies if the NSG is attached to a VM
  # if it is then the NSG should be evaluated by the policy on the VM level 
  - status: "INAPPLICABLE"
    currentStateMessage: "The Network Security Group is evaluated by /ce/ca/azure/virtual-machine/allows-unrestricted-dns-traffic."
    check:
      RELATED_LIST_HAS:
        relationshipName: "CA10__Azure_Network_Interfaces__r"
        status: "COMPLIANT"
  # This check identifies if the NSG is attached to a VM Scale Set
  # if it is then the NSG should be evaluated by the policy on the VM Scale Set level
  - status: "INAPPLICABLE"
    currentStateMessage: "The Network Security Group is evaluated by /ce/ca/azure/vm-scale-set/instance-allows-unrestricted-dns-traffic."
    check:
      RELATED_LIST_HAS:
        relationshipName: "CA10Z1__Azure_VM_Scale_Set_Instance_Network_Ints__r"
        status: "COMPLIANT"
  - status: "INCOMPLIANT"
    currentStateMessage: "The Network Security Group has a rule that allows DNS access from the Internet."
    remediationMessage: "Restrict inbound DNS access from the Internet."
    check:
      RELATED_LIST_HAS:
        relationshipName: "CA10__Azure_Network_Security_Group_Rules__r"
        status: "INCOMPLIANT"
otherwise:
  status: "COMPLIANT"
  currentStateMessage: "The NSG doesn't allow DNS access from the Internet." 
relatedLists:
  - relationshipName: "CA10__Azure_Network_Security_Group_Rules__r"
    importExtracts:
      - file: "/types/CA10__CaAzureNetworkSecurityGroupRule__c/object.extracts.yaml"
    conditions:
      - status: "INAPPLICABLE"
        currentStateMessage: "NSG Deny Rule."
        check:
          NOT_EQUAL:
            left:
              EXTRACT: "CA10__access__c"
            right:
              TEXT: "Allow"
      - status: "INAPPLICABLE"
        currentStateMessage: "NSG Outbound Rule."
        check:
          NOT_EQUAL:
            left:
              EXTRACT: "CA10__direction__c"
            right:
              TEXT: "Inbound"
      - status: "INAPPLICABLE"
        currentStateMessage: "NSG Rule with the port other than TCP, UDP or Any."
        check:
          NOT:
            arg:
              OR:
                args:
                  - IS_EQUAL:
                      left:
                        EXTRACT: "CA10__protocol__c"
                      right:
                        TEXT: "Tcp"
                  - IS_EQUAL:
                      left:
                        EXTRACT: "CA10__protocol__c"
                      right:
                        TEXT: "Udp"
                  - IS_EQUAL:
                      left:
                        EXTRACT: "CA10__protocol__c"
                      right:
                        TEXT: "*"
                  - IS_EQUAL:
                      left:
                        EXTRACT: "CA10__protocol__c"
                      right:
                        TEXT: "null"
      - status: "INAPPLICABLE"
        currentStateMessage: "NSG Rule source is not any address."
        check:
        # returns true when source is neither Internet, *, 0.0.0.0, /0, or Any
          NOT:
            arg:
              OR:
                args:
                  - IS_EQUAL:
                      left:
                        EXTRACT: "CA10__sourceAddressPrefix__c"
                      right:
                        TEXT: "Internet"
                  - IS_EQUAL:
                      left:
                        EXTRACT: "CA10__sourceAddressPrefix__c"
                      right:
                        TEXT: "*"
                  - IS_EQUAL:
                      left:
                        EXTRACT: "CA10__sourceAddressPrefix__c"
                      right:
                        TEXT: "0.0.0.0"
                  - CONTAINS:
                      arg:
                        EXTRACT: "CA10__sourceAddressPrefix__c"
                      substring:
                        TEXT: "/0"
                  - IS_EQUAL:
                      left:
                        EXTRACT: "CA10__sourceAddressPrefix__c"
                      right:
                        TEXT: "Any"
      - status: "INCOMPLIANT"
        currentStateMessage: "NSG Rule with DNS access from the Internet."
        remediationMessage: "Consider restricting internet-level access to your Azure resources."
        check:
          OR:
            args:
              - IS_EQUAL:
                  left:
                    EXTRACT: "CA10__destinationPortRange__c"
                  right:
                    TEXT: "53"
              - AND:
                  args:
                    - LESS_THAN_EQUAL:
                        left:
                          EXTRACT: "CA10__destinationPortFrom__c"
                        right:
                          NUMBER: 53.0
                    - GREATER_THAN_EQUAL:
                        left:
                          EXTRACT: "CA10__destinationPortTo__c"
                        right:
                          NUMBER: 53.0
    otherwise: 
      status: "INAPPLICABLE"
      currentStateMessage: "Unrelated rule."
  - relationshipName: "CA10__Azure_Network_Interfaces__r"
    conditions:
      - status: "COMPLIANT"
        currentStateMessage: "This is a Network Interface with a linked VM."
        check:
          NOT_EMPTY_LOOKUP: "CA10__virtualMachine__r" 
    otherwise:
      status: "INAPPLICABLE"
      currentStateMessage: "This is a Network Interface without a linked VM."
  - relationshipName: "CA10Z1__Azure_VM_Scale_Set_Instance_Network_Ints__r"
    conditions:
      - status: "COMPLIANT"
        currentStateMessage: "This is a Network Interface with a linked VM Scale Set Instance."
        check:
          NOT_EMPTY_LOOKUP: "CA10Z1__vmScaleSetInstance__r" 
    otherwise:
      status: "INAPPLICABLE"
      currentStateMessage: "This is a Network Interface without a linked VM Scale Set Instance."