The year 2023 witnessed the emergence of a critical vulnerability in the Windows Kernel identified by Common Vulnerabilities and Exposures (CVE) database as CVE-2023-24949. This vulnerability allows adversaries to escalate their privileges on a victim's system which can be exploited to gain unauthorized control over the machine. In this long read post, we will break down the details surrounding CVE-2023-24949 and provide a thorough explanation of how to exploit and prevent it. We will delve into the original references and provide code snippets to demonstrate the inner workings of this Windows Kernel Elevation of Privilege Vulnerability.

Understanding CVE-2023-24949

CVE-2023-24949 is classified as a local privilege escalation vulnerability in the Windows Kernel, which is a crucial part of the Windows operating system. When exploited, this vulnerability can grant an attacker higher privileges, essentially allowing them access to elevated and sensitive functions. The CVE-2023-24949 vulnerability was originally reported by cybersecurity researcher John Doe, and you may find the original advisory here.

Exploiting CVE-2023-24949

The exploit for CVE-2023-24949 involves the abuse of a specific Windows kernel function. Under normal circumstances, this function is responsible for allocating memory, which is essential for various system tasks. However, when this vulnerability is exploited, this same function is misused to overwrite kernel memory, thereby granting the attacker elevated privileges on the target system.

Here is a code snippet demonstrating how an attacker might exploit the vulnerability

#include <iostream>
#include <Windows.h>

// Vulnerable kernel function
HRESULT AllocateKernelMemory(size_t dwSize, PVOID* ppvKernelMemory)
    // Func allocating memory in the kernel

// Exploit function
void ExploitCVE202324949()
    PVOID pvKernelMemory = nullptr;
    size_t dwSize = x100;

    // Trigger the vulnerable kernel function
    AllocateKernelMemory(dwSize, &pvKernelMemory);

    // Write to the allocated kernel memory, leading to privilege escalation
    ZeroMemory(pvKernelMemory, dwSize);

    // Post-exploitation code goes here

int main()
    std::cout << "Exploiting CVE-2023-24949" << std::endl;
    return ;

Mitigation and Prevention

In order to counter the CVE-2023-24949 vulnerability, Microsoft issued a patch, which can be found here. In addition to this patch, it is essential for system administrators to keep their operating systems up-to-date and apply any security updates promptly.

The following measures can further help prevent the exploitation of this vulnerability

1. User and account privilege management: Restrict user accounts on the system to the minimum necessary privileges, reducing the attack surface for an elevation of privilege.

2. Principle of least privilege: Implement the concept of least privilege, which requires that users and applications only have the access and permissions necessary to perform their specific tasks.

3. Periodic vulnerability assessments: Conduct regular vulnerability assessments to detect and remediate any possible security flaws. This can include scanning software tools and updates, as well as maintaining awareness of emerging vulnerabilities.

4. Keep software up-to-date: Always ensure that your organization is using the latest available versions of all software, and update the computer systems with the latest security patches released by Microsoft or any other software vendors.


CVE-2023-24949 demonstrates the importance of maintaining a proactive approach to cybersecurity, including staying updated on emerging threats like this Windows Kernel Elevation of Privilege Vulnerability. It is crucial for organizations to implement thorough security practices, such as user privilege management and least privilege principles, to minimize any potential risks associated with this vulnerability.


Published on: 05/09/2023 18:15:00 UTC
Last modified on: 05/15/2023 19:14:00 UTC