CVE-2023-33952 : Vulnerability Insights and Analysis

A double-free vulnerability was found in handling vmw_buffer_object objects in the vmwgfx driver in the Linux kernel. This can allow a local privileged user to escalate privileges and execute code in the context of the kernel.

Understanding CVE-2023-33952

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2023-33952.

What is CVE-2023-33952?

CVE-2023-33952 is a double-free vulnerability in the handling of vmw_buffer_object objects in the vmwgfx driver in the Linux kernel. It arises due to inadequate validation of objects, enabling a local privileged user to exploit the flaw.

The Impact of CVE-2023-33952

The vulnerability poses a medium-severity risk, allowing an attacker to potentially elevate privileges and execute arbitrary code within the kernel context. It affects multiple versions of Red Hat Enterprise Linux.

Technical Details of CVE-2023-33952

The technical details delve into the specific aspects of the vulnerability, including the description, affected systems, and exploitation mechanism.

Vulnerability Description

The issue stems from a lack of validation when handling vmw_buffer_object objects, leading to a double-free condition that could be exploited for privilege escalation and code execution.

Affected Systems and Versions

Affected: Red Hat Enterprise Linux 7, 8, 9
Unaffected: Fedora, some versions of Red Hat Enterprise Linux

Exploitation Mechanism

The vulnerability requires a local privileged user to execute a carefully crafted exploit to trigger the double-free condition, potentially achieving elevated privileges.

Mitigation and Prevention

In this section, you will find guidance on immediate steps, long-term security practices, and patching updates to mitigate the CVE-2023-33952 vulnerability.

Immediate Steps to Take

To mitigate the risk, prevent the affected

vmwgfx

kernel module from loading. Refer to Red Hat's documentation for instructions on blacklisting kernel modules.

Long-Term Security Practices

Implement secure coding practices, conduct regular security audits, and stay informed about security advisories and patches to enhance overall system security.

Patching and Updates

Stay updated with security patches released by Red Hat for affected products to address the CVE-2023-33952 vulnerability.