CVE-2024-30068 Overview
CVE-2024-30068 is an elevation of privilege vulnerability in the Windows Kernel. The flaw is classified as an out-of-bounds read [CWE-125], allowing a low-privileged local attacker to read memory beyond an intended buffer boundary. Successful exploitation enables an attacker to escalate from a standard user context to higher kernel-level privileges. The issue affects a broad range of supported Windows client and server editions, including Windows 10, Windows 11, and Windows Server 2016 through 2022. Microsoft addressed the vulnerability in the June 2024 Patch Tuesday release.
Critical Impact
Local attackers with low privileges can leverage a kernel out-of-bounds read to escalate privileges and impact confidentiality, integrity, and availability across the affected system.
Affected Products
- Microsoft Windows 10 (versions 1507, 1607, 1809, 21H2, 22H2)
- Microsoft Windows 11 (versions 21H2, 22H2, 23H2)
- Microsoft Windows Server 2016, 2019, 2022, and 2022 23H2
Discovery Timeline
- 2024-06-11 - CVE-2024-30068 published to NVD
- 2024-11-21 - Last updated in NVD database
Technical Details for CVE-2024-30068
Vulnerability Analysis
The vulnerability resides in the Windows Kernel and is categorized as an out-of-bounds read [CWE-125]. A local, authenticated attacker can trigger the condition through a crafted system call or kernel interaction that causes the kernel to access memory outside an intended buffer. Because the flaw crosses a security scope, exploitation impacts components beyond the originally vulnerable code path. The result is a privilege escalation from a low-privileged user context to elevated, kernel-level access. The vulnerability does not require user interaction, which makes it suitable for use in post-compromise attack chains where an adversary already has code execution as a standard user.
Root Cause
The root cause is improper validation of an index, size, or pointer when the Windows Kernel reads from a memory buffer. The kernel reads data past the allocated boundary, exposing adjacent kernel memory contents. Attackers can leverage the leaked data to bypass kernel address space layout randomization (KASLR) and chain the read primitive with other techniques to gain SYSTEM privileges.
Attack Vector
The attack vector is local. The attacker must already have the ability to execute code on the target system with low privileges. Remote, network-based exploitation is not possible without an initial foothold. Typical exploitation scenarios include malware delivered through phishing, malicious binaries dropped after web-based exploitation, or attacker-controlled processes running on a multi-user host. No verified public proof-of-concept code is currently available for this CVE.
// No verified public proof-of-concept code is available for CVE-2024-30068.
// Refer to the Microsoft Security Response Center advisory for technical details.
Detection Methods for CVE-2024-30068
Indicators of Compromise
- Unexpected child processes spawning with NT AUTHORITY\SYSTEM privileges from standard user sessions.
- Unsigned or unknown binaries issuing unusual NtSystemCall patterns or kernel-mode transitions shortly after user logon.
- Crash dumps referencing kernel out-of-bounds memory access or bug checks (BSOD) involving kernel modules following execution of an untrusted binary.
Detection Strategies
- Monitor for token manipulation and privilege escalation events, such as Windows Event ID 4672 (special privileges assigned) tied to non-administrative source processes.
- Use behavioral endpoint detection to identify processes that transition from medium to high or system integrity levels without legitimate UAC prompts.
- Correlate unexpected kernel module loads or driver loads (Event ID 6) with subsequent privilege changes.
Monitoring Recommendations
- Centralize Windows Security, Sysmon, and kernel telemetry to a SIEM for cross-host correlation.
- Track patch compliance for the June 2024 cumulative updates across all Windows endpoints and servers.
- Alert on attempts to disable Microsoft Defender, tamper with EDR agents, or clear event logs after a local logon.
How to Mitigate CVE-2024-30068
Immediate Actions Required
- Apply the June 2024 Microsoft security updates to all affected Windows 10, Windows 11, and Windows Server systems.
- Inventory endpoints and servers using configuration management tooling to confirm patch deployment status.
- Restrict local logon rights and limit interactive user access on servers and privileged workstations.
Patch Information
Microsoft released a patch addressing CVE-2024-30068 in the June 2024 Patch Tuesday cycle. Administrators should consult the Microsoft CVE-2024-30068 Advisory for the specific KB article and update package corresponding to each supported Windows build.
Workarounds
- No official vendor workaround is published; patching is the only fully supported remediation.
- Reduce exposure by enforcing the principle of least privilege and removing local administrator rights from standard users.
- Enable hypervisor-protected code integrity (HVCI) and Credential Guard to raise the cost of kernel exploitation on supported hardware.
# Verify installation of the June 2024 cumulative update on a Windows host
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Get-HotFix | Sort-Object -Property InstalledOn -Descending | Select-Object -First 10
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
