CVE-2023-1195 : What You Need to Know

This article provides details about CVE-2023-1195, a use-after-free vulnerability found in the Linux kernel.

Understanding CVE-2023-1195

CVE-2023-1195 is a use-after-free flaw discovered in reconn_set_ipaddr_from_hostname function in fs/cifs/connect.c within the Linux kernel. The vulnerability arises from a specific scenario where the free pointer

server->hostname

is not properly set to NULL, resulting in an invalid pointer request.

What is CVE-2023-1195?

The CVE-2023-1195 vulnerability in the Linux kernel is categorized as a use-after-free flaw, which can lead to potential exploitation by attackers to manipulate memory contents and execute arbitrary code.

The Impact of CVE-2023-1195

Exploiting this vulnerability could allow an attacker to execute arbitrary code, escalate privileges, or cause a denial of service (DoS) condition on affected systems running versions of the Linux kernel prior to 6.1 rc3.

Technical Details of CVE-2023-1195

This section outlines the specific details regarding the vulnerability, including the affected systems, exploitation mechanism, and potential risks.

Vulnerability Description

The use-after-free flaw in reconn_set_ipaddr_from_hostname function in fs/cifs/connect.c in the Linux kernel occurs due to the improper handling of memory pointers, leading to a situation where an invalid pointer request can be made.

Affected Systems and Versions

The vulnerability impacts systems running versions of the Linux kernel prior to 6.1 rc3. It is crucial for users of these affected versions to take immediate action to mitigate the risk of exploitation.

Exploitation Mechanism

By exploiting the CVE-2023-1195 vulnerability, attackers can manipulate memory contents in a way that allows them to execute arbitrary code, potentially leading to unauthorized access or system compromise.

Mitigation and Prevention

To address the CVE-2023-1195 vulnerability and enhance system security, certain steps can be taken to mitigate risks and prevent potential exploitation.

Immediate Steps to Take

Users are advised to apply relevant patches or updates provided by the Linux kernel maintainers to address the use-after-free flaw effectively. Additionally, implementing security best practices and monitoring system activity can help detect and prevent unauthorized exploits.

Long-Term Security Practices

It is essential for organizations to prioritize regular security assessments, updates, and vulnerability scans to identify and remediate potential threats promptly. By promoting a proactive security posture, businesses can reduce their exposure to risks such as the CVE-2023-1195 vulnerability.

Patching and Updates

Stay informed about security advisories and patches released by the Linux kernel developers to address vulnerabilities like CVE-2023-1195. Regularly updating your systems with the latest security fixes and patches will help maintain a secure and resilient environment.