CVE-2023-39192 : Vulnerability Insights and Analysis

A detailed analysis of CVE-2023-39192 outlining the vulnerability, impact, technical details, and mitigation steps.

Understanding CVE-2023-39192

This section dives into the specifics of CVE-2023-39192, shedding light on its nature and implications.

What is CVE-2023-39192?

CVE-2023-39192 involves an out-of-bounds read vulnerability in the Netfilter subsystem of the Linux kernel. This flaw in the xt_u32 module allows a local attacker to trigger an out-of-bounds read, potentially leading to a crash or information disclosure.

The Impact of CVE-2023-39192

The vulnerability poses a medium severity risk with a CVSS base score of 6.7. An attacker with high privileges can exploit this flaw to read beyond the array boundaries, compromising confidentiality.

Technical Details of CVE-2023-39192

Explore the technical aspects of CVE-2023-39192, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The flaw arises from inadequate field validation in the xt_u32 structure, enabling a local privileged attacker to perform an out-of-bounds read, potentially causing a crash or leaking sensitive information.

Affected Systems and Versions

Affected systems include multiple versions of Red Hat Enterprise Linux (6, 7, 8, 9), Fedora, and specific kernel packages. While some versions remain unaffected, others are vulnerable to exploitation.

Exploitation Mechanism

By manipulating the size fields within the xt_u32 structure, a local privileged attacker can extend beyond array boundaries, triggering the out-of-bounds read flaw.

Mitigation and Prevention

Discover the recommended steps to mitigate and prevent exploitation of CVE-2023-39192.

Immediate Steps to Take

To mitigate this vulnerability, prevent the affected

xt_u32

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

Long-Term Security Practices

Implement stringent access controls, regularly update systems with security patches, and monitor for any unusual activities indicating a potential exploit.

Patching and Updates

Ensure timely application of patches provided by Red Hat for affected systems to eliminate the vulnerability.