Ensure that HTTP(S) Access from the Internet is Evaluated and Restricted

ВысокийУровень 1Ручная проверкаazure

Описание

Network security groups should be periodically evaluated for port misconfigurations. Where HTTP(S) is not explicitly required and narrowly configured for resources attached to a network security group, Internet-level access to Azure resources should be restricted or eliminated. The potential security problem with using HTTP(S) over the Internet is that attackers can use various brute force techniques to gain access to Azure resources. Once the attackers gain access, they can use the resource as a launch point for compromising other resources within the Azure tenant.

Как проверяется

Метод проверки: Ручная проверка

Эту рекомендацию нельзя проверить автоматически. Сканирование выводит её вместе с этими инструкциями при указании флага --include-manual.

Audit from Azure Portal 1. Go to Network security groups. 2. Click the name of a network security group. 3. Under Settings, click Inbound security rules. 4. Ensure that no inbound security rule exists that matches the following: o Port: 80, 443, or range including 80 or 443 o Protocol: TCP or Any o Source: 0.0.0.0/0, Internet, or Any o Action: Allow 5. Repeat steps 1-4 for each network security group. To audit from Azure Resource Graph: 1. Go to Resource Graph Explorer. 2. Click New query. 3. Paste the following into the query window: resources | where type =~ "microsoft.network/networksecuritygroups" | project id, name, securityRule = properties.securityRules | mv-expand securityRule | extend access = securityRule.properties.access, direction = securityRule.properties.direction, protocol = securityRule.properties.protocol, destinationPort = case(isempty(securityRule.properties.destinationPortRange), securityRule.properties.destinationPortRanges, securityRule.properties.destinationPortRange), sourceAddress = case(isempty(securityRule.properties.sourceAddressPrefix), securityRule.properties.sourceAddressPrefixes, securityRule.properties.sourceAddressPrefix) | where access =~ "All...

Как исправляется

Метод исправления: Рекомендация или патч инфраструктуры

Remediate from Azure Portal 1. Go to Network security groups. 2. Click the name of a network security group. 3. Under Settings, click Inbound security rules. 4. Check the box next to any inbound security rule matching: o Port: 80, 443, or range including 80 or 443 o Protocol: TCP or Any o Source: 0.0.0.0/0, Internet, or Any o Action: Allow 5. Click Delete. 6. Click Yes. 7. Repeat steps 1-6 for each network security group requiring remediation. Remediate from Azure CLI For each network security group rule requiring remediation, run the following command to delete the rule: az network nsg rule delete --resource-group <resource-group> --nsg-name <network-security-group> --name <rule>

Свойства

Операционные системы: Любая
Теги: access-controlazurecloud
Источник: CIS Microsoft Azure Foundations Benchmark v6.0.0 - 7.4 Ensure that HTTP(S) Access from the Internet is Evaluated and Restricted