CVE-2023-3141 Explained : Impact and Mitigation

This CVE record details a use-after-free vulnerability identified in the Linux Kernel, specifically in the r592_remove function of the media access within drivers/memstick/host/r592.c. The vulnerability can be exploited by a local attacker to crash the system during device disconnect, which could potentially result in a kernel information leak.

Understanding CVE-2023-3141

In this section, we will delve into what CVE-2023-3141 entails, its impact, technical details, affected systems and versions, as well as mitigation and prevention strategies.

What is CVE-2023-3141?

CVE-2023-3141 is a use-after-free flaw found in the Linux Kernel's media access, specifically in the r592_remove function. This flaw can be abused by a local attacker to cause a system crash during device disconnect, potentially leading to a kernel information leak.

The Impact of CVE-2023-3141

The impact of CVE-2023-3141 is significant as it poses a threat to the stability and security of systems running affected versions of the Linux Kernel. The vulnerability could be exploited by an attacker to disrupt system operations and potentially gain access to sensitive kernel information, compromising the overall security posture of the system.

Technical Details of CVE-2023-3141

Now, let's explore the technical aspects of CVE-2023-3141, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in r592_remove function in drivers/memstick/host/r592.c allows for a use-after-free scenario, enabling a local attacker to trigger a system crash during device disconnect in the Linux Kernel. This can lead to a kernel information leak, potentially exposing sensitive data.

Affected Systems and Versions

The affected vendor is "n/a," with the product being the Linux Kernel. Versions prior to Kernel 6.4-rc1 are confirmed to be susceptible to this use-after-free vulnerability.

Exploitation Mechanism

To exploit CVE-2023-3141, a malicious actor would need local access to the targeted system. By triggering the use-after-free scenario in the r592_remove function during device disconnect, the attacker can cause a system crash and potentially extract kernel information.

Mitigation and Prevention

In this section, we will discuss the necessary steps to mitigate the risks posed by CVE-2023-3141 and prevent exploitation of the vulnerability.

Immediate Steps to Take

Organizations should apply security updates provided by the Linux Kernel maintainers promptly to address the use-after-free flaw in the r592_remove function.
Implement access controls to limit local user privileges and reduce the likelihood of unauthorized system manipulation.

Long-Term Security Practices

Regularly monitor and assess system logs for any unusual activity that may indicate exploitation attempts.
Conduct security training for system administrators and users to raise awareness of best practices in maintaining system security.

Patching and Updates

Stay informed about security advisories and updates released by the Linux Kernel maintainers to address known vulnerabilities.
Establish a robust patch management process to ensure timely deployment of security updates to mitigate risks associated with CVE-2023-3141.