External risk intelligence

Windows Kernel Elevation of Privilege Vulnerability

CVE advisoryKnown Exploit

CVE-2020-1027

A Windows Kernel vulnerability allows unauthorized privilege escalation, impacting system control and data integrity. Local attackers can execute code with elevated permissions. Organizations should apply vendor updates to mitigate this risk.

1Halo Surface Signal

Out-of-bounds Write

Microsoft Windows 10 1507

r2

External exposure likelihood

Halo Surface Signal score for CVE-2020-1027

This is a Windows kernel elevation of privilege vulnerability. Exploitation requires local access to the system to execute code, as the vulnerability resides within the internal memory handling of the kernel. It is not reachable via the public internet.

Horizon Alert

Summary of the vulnerability and why it matters

A vulnerability in the Windows Kernel could allow an attacker to gain elevated privileges on a system. This flaw relates to how the kernel handles memory objects. Successful exploitation could lead to unauthorized access and control over the affected system, impacting data integrity and system availability.

  • Vulnerable component: Windows Kernel
  • Core weakness: Improper memory object handling
  • Main business impact: Unauthorized system control

Attack Path

How an attacker could exploit the issue

A vulnerability in the Windows Kernel's memory object handling could allow an attacker to gain elevated privileges. This type of vulnerability requires an attacker to have local access to the affected system to initiate the attack. Successful exploitation could enable an attacker to execute code with higher permissions than they would normally have.

  • Local access is required.
  • Attacker executes code.
  • Attacker gains elevated privileges.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability affects the Windows Kernel's handling of memory objects, potentially allowing for privilege escalation. Attackers could leverage this to execute code with elevated permissions on a targeted system. The identified vulnerabilities impact various versions of Windows operating systems and Windows Server.

  • Likely attacker skill level: Low
  • Required access or conditions: Local system access
  • Business risk or urgency: High

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

An elevation of privilege vulnerability has been identified in the Windows Kernel's memory object handling. Successful exploitation could allow an attacker to execute code with elevated permissions on affected systems. This vulnerability is classified as internal, meaning it requires local access to be exploited.

  • Identify all Windows systems.
  • Restrict access to vulnerable systems.
  • Apply vendor updates and verify.
  • Monitor for related incidents.

Frequently asked questions

What is the Windows Kernel and what does it do?

The Windows Kernel is the core component of the Windows operating system. It manages the system's resources, such as the CPU and memory, and provides essential services for all other software running on the computer. It acts as a bridge between hardware and software, ensuring that applications can interact with the computer's components.

What is the weakness in CVE-2020-1027?

CVE-2020-1027 is an elevation of privilege vulnerability. This means a flaw exists in how the Windows Kernel handles objects in memory, allowing an attacker to gain higher permissions than they should have on the system. This weakness is classified as CWE-787, which indicates a potential for out-of-bounds writes.

How can an attacker exploit this Windows Kernel vulnerability?

Exploiting this vulnerability requires an attacker to have local access to the affected system. It is not triggered by simply visiting a website or opening a malicious file remotely. The attack vector involves manipulating how the kernel manages memory objects, which then allows for privilege escalation.

Who should be concerned about CVE-2020-1027 based on its exposure?

Organizations running vulnerable Windows operating systems should be concerned. Since this vulnerability requires local access to exploit, it is classified as internal. This means the primary risk comes from potential threats already present within the network or from an attacker gaining initial local access to a system.

What is the first step to respond to this CVE threat?

The primary first step for anyone running affected Windows technology is to identify all Windows systems within their environment. Following that, it is crucial to restrict access to these systems and then promptly apply any vendor updates provided by Microsoft to remediate the vulnerability.

References