CVE-2021-3715 : What You Need to Know
Discover how CVE-2021-3715 impacts the Linux kernel's Traffic Control networking subsystem. Learn about the vulnerability, affected systems, exploitation, and mitigation steps.
A flaw was discovered in the "Routing decision" classifier in the Linux kernel's Traffic Control networking subsystem. This vulnerability in the way it handles changing classification filters can lead to a use-after-free condition, enabling unprivileged local users to elevate their privileges on the system, posing a significant threat to confidentiality, integrity, and system availability.
Understanding CVE-2021-3715
This section provides an overview of the CVE-2021-3715 vulnerability.
What is CVE-2021-3715?
CVE-2021-3715 is a vulnerability found in the Linux kernel's Traffic Control networking subsystem, allowing unprivileged local users to escalate their privileges by exploiting a use-after-free condition.
The Impact of CVE-2021-3715
The highest risk associated with CVE-2021-3715 is the potential compromise of confidentiality, integrity, and system availability on affected systems.
Technical Details of CVE-2021-3715
In this section, we delve into the technical aspects of CVE-2021-3715.
Vulnerability Description
The vulnerability arises from the improper handling of changing classification filters within the "Routing decision" classifier in the Linux kernel's Traffic Control networking subsystem.
Affected Systems and Versions
The Linux kernel version 5.10 is affected by CVE-2021-3715. Users with this version should be cautious of the potential privilege escalation threat.
Exploitation Mechanism
Unprivileged local users can exploit this vulnerability to execute arbitrary code and elevate their privileges on the system.
Mitigation and Prevention
This section provides guidelines on mitigating and preventing exploitation of CVE-2021-3715.
Immediate Steps to Take
Users are advised to apply relevant security patches and updates provided by the Linux kernel maintainers to address CVE-2021-3715.
Long-Term Security Practices
Implementing the principle of least privilege, regular security audits, and monitoring system for suspicious activities can enhance overall security posture.
Patching and Updates
Regularly update the Linux kernel to the latest version to ensure that known vulnerabilities, including CVE-2021-3715, are patched and secured.