CVE-2023-1192 : Vulnerability Insights and Analysis

This CVE-2023-1192 involves a use-after-free vulnerability in

smb2_is_status_io_timeout()

in CIFS within the Linux Kernel. This flaw could lead to a denial of service if exploited.

Understanding CVE-2023-1192

This vulnerability affects the Linux Kernel and specifically impacts systems running certain versions of Red Hat Enterprise Linux, Fedora, and their respective kernel packages.

What is CVE-2023-1192?

CVE-2023-1192 is a use-after-free flaw found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. It occurs when CIFS transfers response data to a system call, leaving local variable pointing to a memory region. If the system call frees the memory faster than CIFS uses it, CIFS may access a freed memory region, leading to a denial of service.

The Impact of CVE-2023-1192

This vulnerability has a base CVSS score of 6.5 (Medium severity) with a HIGH impact on availability. Although it requires low privileges, it can still be exploited remotely over a network without user interaction.

Technical Details of CVE-2023-1192

The following details provide more insights into the vulnerability:

Vulnerability Description

The use-after-free flaw in smb2_is_status_io_timeout() in CIFS within the Linux Kernel could result in an attacker triggering a denial of service by accessing a freed memory region.

Affected Systems and Versions

Red Hat Enterprise Linux 6 (Unaffected)
Red Hat Enterprise Linux 7 (Unaffected)
Red Hat Enterprise Linux 8 and 9 (Affected)
Fedora (Affected)

Exploitation Mechanism

Exploiting this vulnerability involves an attacker triggering the use-after-free flaw in the affected CIFS function, potentially causing a denial of service.

Mitigation and Prevention

To address CVE-2023-1192, consider the following steps:

Immediate Steps to Take

Monitor official security channels for patches and updates.
Implement network security measures to mitigate potential attacks.
Stay informed about any developments related to this vulnerability.

Long-Term Security Practices

Regularly update system software and apply security patches promptly.
Conduct periodic security audits and assessments to identify and address vulnerabilities.
Implement security best practices to enhance overall system security posture.

Patching and Updates

Red Hat and other vendors are likely to release patches to address this vulnerability. Ensure to promptly apply these updates to mitigate the risk of exploitation and enhance system security.