Ensure trusted 'named locations' are defined

低レベル 2手動レビューm365

説明

Microsoft Entra ID Conditional Access allows an organization to configure Named locations and configure whether those locations are trusted or untrusted. These settings provide organizations the means to specify Geographical locations for use in conditional access policies, or define actual IP addresses and IP ranges and whether or not those IP addresses and/or ranges are trusted by the organization. The recommended state is to define at least one trusted, IP range named location. Defining trusted source IP addresses or ranges enables organizations to better tailor and enforce Conditional Access policies based on whether authentication attempts originate from trusted or untrusted network locations. Users signing in from trusted IP ranges can be granted reduced access requirements or fewer authentication prompts, while users coming from untrusted or unknown locations may face stricter...

チェック方法

監査方法: 手動レビュー

この推奨事項は自動ではチェックできません。--include-manual を指定すると、スキャン結果にこの手順付きで一覧表示されます。

To audit using the UI: 1. Navigate to the Microsoft Entra admin center https://entra.microsoft.com. 2. Expand Entra ID > Conditional Access and select Policies. 3. Under Manage, click Named locations. 4. For each named location with a Location type of IP ranges, verify there is one with the following criteria: o Trusted is set to Yes. o At least one IP Range is defined 5. Compliance is met when at least one named location is found to meet all the criteria listed above. To audit using the Microsoft Graph API: 1. Execute a GET request to the following relative URI: v1.0/identity/conditionalAccess/namedLocations?$filter=isof('microsoft.graph. ipNamedLocation') 2. For each named location returned, verify the following criteria: o isTrusted is true o ipRanges contains at least one ipv4 or ipv6 range 3. Compliance is met when at least one named location is found to meet all the criteria listed above.

修正方法

修正方法: ガイダンスまたは IaC パッチ

To remediate using the UI: 1. Navigate to the Microsoft Entra admin center https://entra.microsoft.com. 2. Expand Entra ID > Conditional Access and select Policies. 3. Under Manage, click Named locations. 4. Click on IP ranges location to add a new location. 5. Enter a name for this location setting in the Name field. 6. Click on the + icon. 7. Add only a trusted IP Address Range in CIDR notation inside the text box that appears. 8. Click on the Add button. 9. Repeat steps 6 through 8 for each additional IP range. 10. Select the Mark as trusted location checkbox. 11. Once finished, click on Create. Note: There is no single prescribed method for applying a named location to a Conditional Access policy, as the correct configuration depends on the specific access control requirements. Implementers should have a clear understanding of how named locations function before applying them to production policies.

プロパティ

オペレーティングシステム: すべて
タグ: m365saas
参照: CIS Microsoft 365 Foundations Benchmark v7.0.0 - 5.2.2.14 Ensure trusted 'named locations' are defined