CTD-000162

Entra ID Missing Conditional Access Policy for blocking access for untrusted locations

High
Entra ID
Defense Evasion Initial Access
v8

Signature Identity

CTD-000162
Threat ID
8
Version
IOE
Indicator Type

Threat Description

The absence of a Conditional Access policy in Entra ID to block access from untrusted locations represents a significant vulnerability. Threat actors can exploit this gap by attempting unauthorized access from external and high-risk locations. Without a policy to deny such attempts, the environment is exposed to credential compromise, brute force, and other attack methods. Proper Conditional Access policies enhance defense mechanisms by ensuring only trusted locations can interact with critical services.

MITRE ATT&CK: Attack Tactics

Defense Evasion Initial Access

D3FEND: Defend Tactics

D3-APA (Access Policy Administration)

Remediation

  1. Identify trusted locations by defining IP ranges and geolocations considered safe for your organization.
  2. Navigate to Entra ID > Security > Conditional Access to create a Conditional Access policy:
    Configure a new policy with the following assignments:
    • Users: All users or specific groups.
    • Locations: All trusted networks and locations.
  3. Set enforcement to block access for untrusted locations.
  4. Validate the configuration in a test environment before deployment.
  5. Regularly review and adjust policies based on new threat intelligence.

Frequently Asked Questions

What does Entra ID Missing Conditional Access Policy for blocking access for untrusted locations mean?

A missing Conditional Access policy in Entra ID means there is no configuration to block access from external and high-risk locations, allowing potential attackers to attempt unauthorized access using compromised credentials. This lack of control enables attackers to bypass authentication checks.

This issue is rated high severity because it allows attackers to exploit the absence of a Conditional Access policy, increasing the risk of credential compromise and other security breaches. Specifically, an attacker can use compromised credentials to access sensitive resources from external and high-risk locations.

Attackers may attempt brute-force attacks or use compromised credentials to access sensitive resources from external and high-risk locations, exploiting the lack of a Conditional Access policy to block unauthorized access. This enables attackers to gain persistent access to the environment.

Cayosoft Guardian continuously monitors Entra ID's Conditional Access policies and flags any missing or incomplete configurations that leave the environment vulnerable to unauthorized access. This allows administrators to identify and address potential security risks.

Cayosoft Guardian alerts administrators to create and enforce a Conditional Access policy that blocks access from external and high-risk locations, ensuring only trusted locations can interact with critical services in Entra ID. This helps prevent attackers from exploiting the lack of a Conditional Access policy.

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Cayosoft Protector provides continuous monitoring and real-time alerts across your entire Microsoft Identity stack

Classification
Systems
Entra ID
Themes
Account protection Tenant-wide
Attack Tactics
Defense Evasion Initial Access
Defend Tactics
D3-APA (Access Policy Administration)
Indicator Types
IOE
Related Threats
CTD-000139
Kerberos Constrained Delegation: krbtgt Risks
Critical
CTD-000122
Active Directory Schema Update Permission Risks
Critical