CVE-2021-23134 : Exploit Details and Defense Strategies

A detailed overview of CVE-2021-23134, a Use After Free vulnerability in nfc sockets in the Linux Kernel before version 5.12.4 that allows local attackers to elevate their privileges.

Understanding CVE-2021-23134

This section covers essential information about the CVE-2021-23134 vulnerability.

What is CVE-2021-23134?

CVE-2021-23134 is a Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4. It enables local attackers to raise their privileges, typically triggered by privileged local users with the CAP_NET_RAW capability.

The Impact of CVE-2021-23134

The vulnerability poses a significant impact, with a CVSSv3.1 base score of 7.8 (High), as it affects confidentiality, integrity, and availability.

Technical Details of CVE-2021-23134

In this section, we delve into the specific technical aspects of the CVE-2021-23134 vulnerability.

Vulnerability Description

The Use After Free vulnerability arises in nfc sockets within the Linux Kernel, permitting local attackers to enhance their privileges.

Affected Systems and Versions

The vulnerability affects Linux Kernel versions earlier than 5.12.4.

Exploitation Mechanism

The issue can be exploited by privileged local users with the CAP_NET_RAW capability.

Mitigation and Prevention

Discover how to mitigate the risks associated with CVE-2021-23134 and prevent potential exploitation.

Immediate Steps to Take

Apply the provided patch to address the vulnerability effectively.

Long-Term Security Practices

Enhance overall system security through continuous monitoring and security awareness.

Patching and Updates

Stay updated with the latest patches and security updates to protect your system from known vulnerabilities.