CVE-2024-38133 Overview
CVE-2024-38133 is a Windows Kernel elevation of privilege vulnerability affecting multiple versions of Windows 10, Windows 11, and Windows Server. The flaw allows a local, authenticated attacker to elevate privileges on an affected system, with high impact to confidentiality, integrity, and availability. Microsoft disclosed the issue as part of its August 2024 security update cycle. The vulnerability is categorized under [CWE-138] (Improper Neutralization of Special Elements).
Critical Impact
Successful exploitation grants an authenticated local attacker elevated privileges on the Windows kernel, enabling code execution at a higher integrity level and broader system compromise.
Affected Products
- Microsoft Windows 10 (1809, 21H2, 22H2)
- Microsoft Windows 11 (21H2, 22H2, 23H2, 24H2)
- Microsoft Windows Server 2019, Server 2022, Server 2022 23H2
Discovery Timeline
- 2024-08-13 - CVE-2024-38133 published to NVD
- 2024-08-13 - Microsoft releases security patch via August 2024 Patch Tuesday
- 2024-08-16 - Last updated in NVD database
Technical Details for CVE-2024-38133
Vulnerability Analysis
The vulnerability resides in the Windows Kernel and enables local elevation of privilege. An attacker who has already obtained low-privileged code execution on the target host can leverage the flaw to escalate to SYSTEM or kernel-level privileges. Exploitation requires local access and low privileges, but no user interaction.
Kernel-mode elevation flaws of this class typically allow an attacker to bypass security boundaries enforced by the Windows kernel, undermining process isolation, token integrity, and access control checks. The result is full host compromise from an initially constrained foothold.
Root Cause
Microsoft has not published the technical specifics of the underlying defect. The associated weakness, [CWE-138], indicates improper neutralization of special elements processed by the kernel. This class of issue often appears when kernel routines fail to validate or sanitize structured input from user mode before acting on it.
Attack Vector
The attack vector is local. An attacker must first achieve code execution on the target system, typically through phishing, a separate remote vulnerability, or compromised credentials. The attacker then runs a crafted program that interacts with the vulnerable kernel component to trigger the privilege escalation. No user interaction is required during exploitation, and the attack complexity is low.
No public proof-of-concept exploit, exploit database entry, or CISA KEV listing exists for CVE-2024-38133 at the time of writing.
Detection Methods for CVE-2024-38133
Indicators of Compromise
- Unexpected child processes spawned by user-mode applications running with SYSTEM or kernel-level integrity.
- Token manipulation events where a low-privileged process suddenly executes with elevated privileges.
- Anomalous loading of kernel drivers or unsigned modules following the execution of an untrusted binary.
Detection Strategies
- Monitor Windows Security event logs for privilege assignment events (Event IDs 4672, 4673, 4674) tied to non-administrative user contexts.
- Hunt for processes that abruptly transition integrity levels mid-execution, a common signal of token theft or kernel exploitation.
- Correlate local logon events with subsequent administrative activity from accounts that do not normally hold those rights.
Monitoring Recommendations
- Enable kernel-mode auditing and Microsoft-Windows-Kernel-General provider logging on critical hosts.
- Forward endpoint telemetry to a centralized analytics platform to baseline normal process and privilege behavior.
- Alert on execution of unsigned binaries followed by privilege escalation indicators within a short time window.
How to Mitigate CVE-2024-38133
Immediate Actions Required
- Apply the August 2024 Microsoft security update to all affected Windows 10, Windows 11, and Windows Server systems.
- Inventory endpoints and servers against the affected product list to confirm patch coverage.
- Restrict local logon rights and limit interactive access to systems that have not yet received the update.
Patch Information
Microsoft addressed CVE-2024-38133 in the August 13, 2024 security updates. Patch details, KB identifiers, and per-product update packages are available in the Microsoft CVE-2024-38133 Advisory. Administrators should deploy the update through Windows Update, WSUS, or their managed patching solution.
Workarounds
- No official workaround is published by Microsoft; patching is the supported remediation path.
- Reduce exposure by enforcing least privilege and removing local administrator rights from standard users.
- Apply application allowlisting to prevent execution of untrusted binaries that could deliver the exploit payload.
# Verify patch installation status on Windows hosts
Get-HotFix | Where-Object { $_.InstalledOn -ge (Get-Date '2024-08-13') }
# Confirm OS build is at or above the August 2024 servicing baseline
[System.Environment]::OSVersion.Version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
