CVE-2024-1591 in Privilege Management
Summary
by MITRE • 02/16/2024
Prior to version 24.1, a local authenticated attacker can view Sysvol when Privilege Management for Windows is configured to use a GPO policy. This allows them to view the policy and potentially find configuration issues.
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Analysis
by VulDB Data Team • 02/16/2024
This vulnerability affects Microsoft Privilege Management for Windows versions prior to 24.1 and represents a significant access control flaw that enables local authenticated attackers to bypass intended security boundaries. The vulnerability specifically impacts environments where Privilege Management for Windows is configured to utilize Group Policy Object (GPO) policies for managing privileged access. When properly configured, the system should enforce strict access controls to prevent unauthorized viewing of sensitive policy information. However, this flaw allows authenticated local users to access Sysvol directories containing GPO policy data, effectively undermining the security controls designed to protect privileged configuration information.
The technical nature of this vulnerability stems from improper access controls within the Privilege Management for Windows implementation. Sysvol is a critical directory in Active Directory environments that stores group policy data, system policies, and configuration settings that are typically protected from unauthorized access. The flaw occurs when the system fails to properly validate access permissions for local users attempting to access these policy files. This misconfiguration creates an information disclosure vulnerability where attackers can potentially discover sensitive policy configurations, including privilege assignment details, access control lists, and other administrative settings that may reveal system architecture and security implementation weaknesses.
From an operational impact perspective, this vulnerability presents a substantial risk to organizations that rely on Privilege Management for Windows to control privileged access within their environments. Attackers who can view Sysvol contents may discover policy configurations that reveal system vulnerabilities, identify weak privilege assignments, or uncover misconfigurations that could be exploited in subsequent attack phases. The information gathered through this vulnerability can be leveraged to craft more targeted attacks, escalate privileges, or identify additional security gaps within the organization's infrastructure. This represents a classic case of privilege escalation through information disclosure, where the initial access is limited but the intelligence gained can enable more sophisticated attacks.
Organizations should immediately implement mitigations including updating to Privilege Management for Windows version 24.1 or later, which contains the necessary patches to address the access control flaw. Security teams should also conduct comprehensive audits of their GPO configurations to identify any potential exposure of sensitive policy information and implement additional monitoring for unauthorized access attempts to Sysvol directories. The vulnerability aligns with CWE-284 Access Control Issues, specifically representing improper access control where local authenticated users can access resources they should not be permitted to view. From an ATT&CK framework perspective, this vulnerability maps to T1078 Valid Accounts and T1566 Phishing, as it can enable attackers to gain access to legitimate accounts and then use discovered policy information for further attacks. Organizations should also consider implementing additional network segmentation and access controls to limit the potential impact of such information disclosure vulnerabilities within their environments.