CVE-2021-36086 Explained : Impact and Mitigation

This CVE-2021-36086 article provides insights into a use-after-free vulnerability in the CIL compiler within SELinux 3.2.

Understanding CVE-2021-36086

This section delves into the implications and technical details of CVE-2021-36086.

What is CVE-2021-36086?

The vulnerability lies in cil_reset_classpermission within the CIL compiler of SELinux 3.2, triggered from cil_reset_classperms_set and cil_reset_classperms_list.

The Impact of CVE-2021-36086

The use-after-free issue can lead to potential security breaches and unauthorized access in systems running SELinux 3.2.

Technical Details of CVE-2021-36086

Explore the specifics of the vulnerability, affected systems, and exploitation methods.

Vulnerability Description

The flaw allows attackers to exploit the use-after-free condition in the CIL compiler, compromising system integrity.

Affected Systems and Versions

All systems running SELinux 3.2 are vulnerable to this use-after-free bug.

Exploitation Mechanism

Malicious actors can exploit the vulnerability through crafted input, leading to unauthorized system access.

Mitigation and Prevention

Discover the necessary steps to secure systems against CVE-2021-36086.

Immediate Steps to Take

Users should apply patches, monitor system logs for suspicious activities, and restrict unnecessary access.

Long-Term Security Practices

Implement regular software updates, conduct security audits, and follow secure coding practices to enhance system resilience.

Patching and Updates

Stay informed about security advisories, install vendor-recommended patches promptly, and maintain a robust cybersecurity posture.