CVE-2024-38201: Azure Stack Hub Privilege Escalation

CVE-2024-38201 Overview

CVE-2024-38201 is an elevation of privilege vulnerability affecting Microsoft Azure Stack Hub. Microsoft published the advisory on August 13, 2024. The flaw is categorized under [CWE-20] Improper Input Validation and requires local access, high attack complexity, and user interaction to exploit successfully.

A successful attack yields high impact to confidentiality, integrity, and availability of the affected Azure Stack Hub instance. No authentication is required from the attacker, but a legitimate user must perform an action to enable exploitation. No public proof-of-concept has been released, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Critical Impact
Successful exploitation allows an attacker to elevate privileges on Azure Stack Hub, gaining high-level access to confidential data, system integrity, and service availability.

Affected Products

Microsoft Azure Stack Hub
Azure Stack Hub Integrated Systems running unpatched builds
Azure Stack Hub management components exposed to local users

Discovery Timeline

2024-08-13 - CVE-2024-38201 published to NVD by Microsoft
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-38201

Vulnerability Analysis

CVE-2024-38201 is an elevation of privilege issue in Azure Stack Hub, Microsoft's on-premises hybrid cloud platform. The vulnerability is classified under [CWE-20] Improper Input Validation, indicating that an Azure Stack Hub component fails to properly validate input before acting on it.

An attacker with local access to the Azure Stack Hub environment can craft input that bypasses expected validation logic. When a user with higher privileges interacts with the malicious content, the attacker's context gains elevated permissions within the platform. This chain requires the attacker to prepare the exploitation conditions and then convince a privileged user to trigger the flaw.

Microsoft has not released detailed technical information about the affected component. See the Microsoft Security Advisory for CVE-2024-38201 for authoritative details.

Root Cause

The root cause is improper input validation within an Azure Stack Hub component. The affected code accepts data from a lower-privileged context without enforcing sufficient constraints, allowing that data to influence a higher-privileged operation.

Attack Vector

Exploitation requires local access to the Azure Stack Hub system and user interaction from a privileged account. The attack complexity is high, meaning the attacker must prepare specific conditions before the vulnerability can be triggered. No prior authentication is needed for the attacker to stage the exploit.

No public exploit code or proof-of-concept has been observed. Microsoft has not reported active exploitation, and the CVE is not present in the CISA KEV catalog.

Detection Methods for CVE-2024-38201

Indicators of Compromise

Unexpected privilege escalation events on Azure Stack Hub management endpoints or infrastructure roles
Anomalous process execution originating from lower-privileged Azure Stack Hub user contexts
Unusual configuration or resource-provider changes performed by accounts that do not normally hold administrative rights
Local logon activity followed shortly by privileged administrative actions on the same host

Detection Strategies

Monitor Azure Stack Hub audit logs for privilege changes, role assignments, and unexpected administrative operations
Correlate local session activity with subsequent privileged API calls to the Azure Resource Manager endpoint
Baseline normal administrator behavior and alert on deviations, including off-hours privileged actions
Track file and configuration changes on Azure Stack Hub infrastructure hosts using integrity monitoring

Monitoring Recommendations

Enable and retain Azure Stack Hub diagnostic logs and forward them to a centralized SIEM for correlation
Watch for user-interaction events, such as opening files or approving prompts, that precede privileged actions
Alert on newly created accounts, role bindings, or elevated tokens on Azure Stack Hub management planes

How to Mitigate CVE-2024-38201

Immediate Actions Required

Apply the Microsoft security update for CVE-2024-38201 to all Azure Stack Hub deployments as documented in the Microsoft Security Update Guide
Restrict local access to Azure Stack Hub infrastructure to a minimal set of trusted administrators
Enforce least-privilege role assignments across Azure Stack Hub tenants and operator accounts
Review recent privileged actions and audit logs for signs of pre-patch abuse

Patch Information

Microsoft has released a security update for Azure Stack Hub addressing CVE-2024-38201. Apply the Azure Stack Hub update package that corresponds to your current build. Consult the Microsoft Security Update Guide entry for CVE-2024-38201 for exact build numbers and update procedures.

Workarounds

Limit local and administrative access to Azure Stack Hub hosts until the update is deployed
Require multi-factor authentication for all Azure Stack Hub operator and administrator accounts
Segment Azure Stack Hub management networks from general user networks to reduce local access opportunities
Train administrators to avoid interacting with untrusted content on Azure Stack Hub management systems

bash

# Verify current Azure Stack Hub build after patching
Get-AzureStackStampInformation