CVE-2021-3982 : Vulnerability Insights and Analysis

A privilege escalation vulnerability has been identified in Linux distributions using CAP_SYS_NICE for gnome-shell. Attackers with low privilege permissions can exploit this issue to increase process scheduler priority, potentially leading to a Denial of Service (DoS) against other services on the same machine.

Understanding CVE-2021-3982

This section delves into the details of CVE-2021-3982.

What is CVE-2021-3982?

CVE-2021-3982 is a privilege escalation vulnerability affecting Linux distributions that utilize CAP_SYS_NICE for gnome-shell. Attackers can leverage this vulnerability to potentially conduct a Denial of Service attack against other services on the compromised machine.

The Impact of CVE-2021-3982

The impact of CVE-2021-3982 includes the risk of unauthorized users elevating their privileges and disrupting the normal operation of services on the affected machine.

Technical Details of CVE-2021-3982

Explore the technical aspects of CVE-2021-3982.

Vulnerability Description

The vulnerability arises from the way CAP_SYS_NICE is implemented in gnome-shell, allowing attackers to manipulate process scheduler priorities.

Affected Systems and Versions

The vulnerability affects gnome-shell downstream versions utilizing CAP_SYS_NICE.

Exploitation Mechanism

Attackers with low privilege permissions can exploit this vulnerability to increase process scheduler priority, potentially leading to DoS incidents.

Mitigation and Prevention

Learn how to mitigate and prevent CVE-2021-3982.

Immediate Steps to Take

Users are advised to apply relevant security patches and updates to mitigate the risk of exploitation.

Long-Term Security Practices

Implementing the principle of least privilege and regularly updating systems can enhance long-term security posture.

Patching and Updates

Stay informed about security patches and updates released by the relevant Linux distribution providers to address CVE-2021-3982.