57 lines
1.8 KiB
YAML
57 lines
1.8 KiB
YAML
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id: azure-nsg-icmp-unrestricted
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info:
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name: Unrestricted ICMP Access in Azure NSGs
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author: princechaddha
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severity: high
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description: |
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Ensure that Microsoft Azure network security groups (NSGs) do not allow unrestricted inbound access using Internet Control Message Protocol (ICMP) to prevent potential network-related attacks.
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impact: |
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Allowing unrestricted ICMP access can expose the network to various threats, including Denial of Service (DoS) attacks and network mapping.
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remediation: |
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Configure NSG rules to restrict ICMP traffic. Only allow necessary ICMP types and codes and monitor ICMP activity to detect unusual patterns.
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reference:
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- https://docs.microsoft.com/en-us/azure/virtual-network/network-security-groups-overview
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tags: cloud,devops,azure,microsoft,nsg,azure-cloud-config
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flow: |
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code(1);
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for (let NsgData of iterate(template.nsgdata)) {
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NsgData = JSON.parse(NsgData)
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set("nsg", NsgData.name)
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set("resourcegroup", NsgData.resourceGroup)
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code(2)
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}
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self-contained: true
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code:
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- engine:
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- sh
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- bash
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source: |
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az network nsg list --query '[*].{name:name, resourceGroup:resourceGroup}' --output json
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extractors:
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- type: json
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name: nsgdata
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internal: true
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json:
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- '.[]'
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- engine:
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- sh
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- bash
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source: |
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az network nsg rule list --nsg-name $nsg --resource-group $resourcegroup --query "[?direction=='Inbound' && access=='Allow' && protocol=='ICMP']"
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matchers:
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- type: word
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words:
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- '"sourceAddressPrefix": "*"'
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- '"sourceAddressPrefix": "internet"'
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- '"sourceAddressPrefix": "any"'
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extractors:
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- type: dsl
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dsl:
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- 'nsg + " has unrestricted access using ICMP"'
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