CVE-2020-0690 Overview
CVE-2020-0690 is an elevation of privilege vulnerability in Microsoft DirectX. The flaw stems from improper handling of objects in memory by the DirectX graphics subsystem. Microsoft published the advisory on March 12, 2020 as part of its monthly security update cycle.
The vulnerability affects Windows 10, Windows Server 2016, and Windows Server 2019 across multiple feature update versions. An attacker who successfully exploits the flaw can run arbitrary code in kernel mode and gain full control of an affected system.
Critical Impact
Successful exploitation allows an attacker to execute code in kernel mode, install programs, view or change data, and create new accounts with full user rights.
Affected Products
- Microsoft Windows 10 (versions 1607, 1709, 1803, 1809, 1903, 1909)
- Microsoft Windows Server 2016 (versions 1803, 1903, 1909)
- Microsoft Windows Server 2019
Discovery Timeline
- 2020-03-12 - CVE-2020-0690 published to NVD and Microsoft releases security patch
- 2024-11-21 - Last updated in NVD database
Technical Details for CVE-2020-0690
Vulnerability Analysis
The vulnerability resides within the DirectX graphics subsystem, a kernel-mode component used for accelerated 2D and 3D rendering on Windows. DirectX exposes interfaces to user-mode applications through kernel-mode drivers including dxgkrnl.sys. Improper handling of objects in memory creates a condition that an authenticated local attacker can leverage to escalate privileges.
An attacker would first need to log on to the system, then execute a specially crafted application that interacts with vulnerable DirectX kernel interfaces. The crafted input triggers the memory handling error, allowing the attacker's code to run in kernel mode.
The issue is categorized under [NVD-CWE-noinfo] because Microsoft has not disclosed the specific weakness class. EPSS data indicates a higher-than-baseline likelihood of exploit attempts relative to typical CVEs.
Root Cause
The root cause is improper memory object handling within the DirectX kernel-mode component. When the component processes certain objects, it does not properly validate or track object state. This condition can lead to memory corruption or unsafe pointer usage at ring 0.
Attack Vector
Exploitation requires local code execution on the target. The attacker runs a malicious application that issues crafted requests to DirectX APIs. The crafted requests force the kernel-mode component into an unsafe state, enabling the attacker to execute code with SYSTEM privileges. The vulnerability does not require user interaction beyond logging on with valid credentials.
No public proof-of-concept exploit code or active exploitation has been documented for this CVE. Refer to the Microsoft Security Advisory CVE-2020-0690 for vendor technical details.
Detection Methods for CVE-2020-0690
Indicators of Compromise
- Unexpected processes spawned with SYSTEM token from user-context parents
- Crashes or abnormal terminations involving dxgkrnl.sys or related DirectX kernel components
- Loading of unsigned or unexpected modules into processes that interact with DirectX APIs
- New local administrator accounts or service installations following execution of unknown binaries
Detection Strategies
- Monitor for token manipulation and privilege escalation events on Windows endpoints, especially process tokens that change to NT AUTHORITY\SYSTEM
- Correlate kernel crash dumps referencing DirectX components with subsequent suspicious child-process creation
- Apply behavioral analytics to identify unusual sequences of low-privilege processes interacting with graphics kernel interfaces before launching administrative actions
Monitoring Recommendations
- Enable Windows Event Log forwarding for Security IDs 4672 (special privileges assigned) and 4688 (process creation) and ingest into a centralized SIEM
- Track patch state across Windows 10, Server 2016, and Server 2019 fleets to confirm March 2020 cumulative updates are installed
- Alert on creation of scheduled tasks, services, or accounts immediately following execution of unsigned binaries
How to Mitigate CVE-2020-0690
Immediate Actions Required
- Apply the March 2020 Microsoft security updates to all affected Windows 10, Server 2016, and Server 2019 systems
- Inventory endpoints to confirm patch deployment across all listed feature update branches (1607 through 1909 and Server 2019)
- Restrict local logon rights on sensitive systems to limit the population of users who could trigger local exploitation
- Enforce application allowlisting to block unauthorized binaries from executing
Patch Information
Microsoft released the official fix for CVE-2020-0690 on March 12, 2020 through its monthly security update channel. Administrators should consult the Microsoft Security Advisory CVE-2020-0690 for the specific KB article and update package corresponding to each affected Windows version.
Workarounds
- No vendor-supplied workarounds are documented; patching is the only supported remediation
- Reduce attack surface by limiting interactive logon rights and removing unnecessary local accounts
- Deploy endpoint protection capable of blocking suspicious local privilege escalation behavior until patches are validated and rolled out
# Verify the March 2020 security update is installed on Windows hosts
Get-HotFix | Where-Object { $_.InstalledOn -ge [datetime]'2020-03-10' } | Sort-Object InstalledOn
# Identify systems missing the patch via WSUS or SCCM compliance reports
Get-WindowsUpdateLog
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
