External risk intelligence

Azure Stack Hub Elevation of Privilege Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.0)

CVE-2024-38216

Azure Stack Hub is a hybrid cloud platform designed for on-premises deployment, typically residing within private enterprise networks or data centers. While it manages cloud resources, direct exposure to the public internet is not a standard or required deployment pattern for the core management interface.

Microsoft Azure Stack Hub

before 1.2311.1.22

Halo Surface Signal: 2 out of 5 — less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns a critical elevation of privilege vulnerability identified in Microsoft Azure Stack Hub. The issue could allow an authenticated attacker with low privileges to escalate their access within the affected environment, potentially leading to significant compromise of system integrity and confidentiality. Understanding the potential reach and impact of this vulnerability is crucial for maintaining the security posture of our hybrid cloud infrastructure.

Allows limited users to gain full control.
Matters for protecting hybrid cloud systems.
Confirm relevance and exposure of Azure Stack Hub.

Attack Path

How an attacker could exploit the issue

An attacker with lower-privileged access to Azure Stack Hub could potentially escalate their privileges. This could occur if a user with such access interacts with a specifically crafted malicious interface, leading to the execution of arbitrary code in a privileged context.

Requires authenticated access.
Triggered by user interaction with a malicious interface.
Allows privilege escalation and code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an authenticated attacker to elevate their privileges when a user interacts with a malicious user interface. This may affect the confidentiality, integrity, and availability of the Azure Stack Hub system and its data.

System and user data could be affected.
Elevation of privilege may occur.
Unauthorized access and system disruption.

Operational Fix

Recommended remediation, mitigation, and detection steps

This critical elevation of privilege vulnerability in Microsoft Azure Stack Hub necessitates a coordinated response. Application owners, infrastructure teams, and platform administrators must collaborate to identify all instances of Azure Stack Hub, assess their exposure, and prioritize remediation. The initial step involves confirming the presence of the affected software, determining its business criticality, and identifying the accountable owner to plan the appropriate response, which may involve vendor coordination or a planned maintenance update.

Ownership: Infrastructure and platform teams.
Verification: Confirm reachability and business criticality.
Action: Plan remediation based on verified risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Azure Stack Hub?

Azure Stack Hub is a hybrid cloud platform that allows organizations to run Azure services from their own on-premises data centers. It acts as an extension of the public cloud, providing a consistent environment for developers to build and deploy applications locally while maintaining control over physical infrastructure and data residency within private network boundaries.

What does this elevation of privilege vulnerability mean?

This vulnerability falls under the CWE-20 class, which relates to improper input validation. In the context of CVE-2024-38216, it means the software may fail to safely handle certain inputs. An attacker who is already logged in with restricted permissions could exploit this flaw to bypass those limitations, tricking the system into granting them higher-level access than they are authorized to have.

How is this vulnerability triggered?

Triggering this flaw requires an attacker to already have low-privileged authenticated access to the environment. The attack typically happens when a user interacts with a specifically crafted malicious interface. Importantly, this issue is not triggered by passive network traffic; it necessitates active engagement with the manipulated interface to successfully execute unauthorized code in a privileged context.

Do I need to worry about this if my system is internal?

Halo Surface Signal notes that Azure Stack Hub is designed for on-premises use and generally resides within private enterprise networks. While its management interface is typically not exposed to the public internet, the vulnerability remains relevant for internal security. If an attacker gains an initial foothold inside your network, they could leverage this flaw to elevate their privileges and compromise the entire hybrid cloud system.

How should I respond to this threat advisory?

Begin by identifying all Azure Stack Hub instances within your infrastructure and determining who is responsible for their maintenance. Verify the version you are running to confirm if you are affected. Once identified, coordinate with your platform administrators and infrastructure teams to prioritize the application of vendor-provided security updates through your standard, planned maintenance processes.

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38216

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.