External risk intelligence

Microsoft OMI Privilege Escalation Vulnerability

CVE advisoryKnown Exploit

CVE-2021-38649

The Open Management Infrastructure (OMI) has a privilege escalation vulnerability. This could allow an attacker with local access to gain elevated control over affected systems, posing a risk to data confidentiality and system integrity. Organizations using specific Microsoft Azure services should assess their exposure

1Halo Surface Signal

Microsoft Azure Automation State Configuration

External exposure likelihood

Halo Surface Signal score for CVE-2021-38649

The vulnerability exists within the Open Management Infrastructure (OMI), which functions as a local management agent on systems. It is not an internet-facing service, does not provide a public web interface, and is designed for internal system administration and monitoring tasks rather than external network communication.

Horizon Alert

Summary of the vulnerability and why it matters

Open Management Infrastructure (OMI) is vulnerable due to a flaw that permits unauthorized access and control. This weakness can lead to significant business risk by compromising system integrity and data confidentiality. The exploitation of this vulnerability could allow an attacker to gain elevated privileges on affected systems.

  • Vulnerable: Open Management Infrastructure
  • Weakness: Privilege escalation flaw
  • Impact: Compromised system integrity

Attack Path

How an attacker could exploit the issue

This vulnerability allows an attacker to elevate their privileges on an affected system. An attacker with local access to a system running the vulnerable software could exploit this to gain higher levels of control. This could lead to the compromise of sensitive data or further system disruption.

  • Local access required
  • Attacker triggers action
  • Elevated control achieved

Live Threat

Current exploitation, exposure, and threat context

This vulnerability impacts systems that utilize the Open Management Infrastructure (OMI) for management and monitoring. An attacker with limited access could potentially exploit this to gain elevated privileges. The potential for privilege escalation presents a significant business risk, necessitating prompt attention and remediation.

  • Likely attacker skill: Low.
  • Required access: Local access.
  • Business risk: High.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability impacts organizations using specific Microsoft Azure services, potentially allowing unauthorized elevation of privileges. Understanding and mitigating this risk is crucial for maintaining system integrity and security.

  • Find affected assets.
  • Reduce exposure or isolate risk.
  • Fix, verify, and monitor.

Frequently asked questions

What is Microsoft Azure Automation State Configuration?

Azure Automation State Configuration is a service that uses Desired State Configuration (DSC) to provide automation for your Azure environment. It helps manage the configuration of your virtual machines and other resources.

What kind of weakness does CVE-2021-38649 represent?

CVE-2021-38649 is an elevation of privilege vulnerability. This means an attacker could exploit it to gain higher-level access and control than they were initially intended to have on an affected system.

What are the preconditions for exploiting CVE-2021-38649?

Exploiting this vulnerability requires an attacker to have local access to the affected system. It is not triggered by remote network access or by external web requests.

Who should be concerned about this internal vulnerability?

Organizations running Open Management Infrastructure (OMI) on their systems should be concerned. Since this is an internal vulnerability requiring local access, it primarily affects systems managed within an organization's own network.

What is the first step to address this vulnerability?

The first step is to identify all systems within your environment that are running the affected software. Once identified, you should follow vendor guidance to apply necessary updates or remediations.

References