CVE-2021-23133 : Security Advisory and Response

A race condition in Linux kernel SCTP sockets before version 5.12-rc8 can lead to kernel privilege escalation. This CVE was published on 2021-04-13 by Or Cohen from Palo Alto Networks.

Understanding CVE-2021-23133

This section delves into the details of the CVE-2021-23133 vulnerability in the Linux Kernel.

What is CVE-2021-23133?

CVE-2021-23133 is a race condition vulnerability in Linux kernel SCTP sockets, allowing privilege escalation from network service or unprivileged processes.

The Impact of CVE-2021-23133

The vulnerability poses a medium-severity threat with a CVSS base score of 6.7, impacting confidentiality, integrity, and availability of the system.

Technical Details of CVE-2021-23133

Explore more about the technical aspects of CVE-2021-23133.

Vulnerability Description

The issue arises from a race condition in net/sctp/socket.c, potentially enabling an attacker to escalate privileges to root.

Affected Systems and Versions

The vulnerability affects Linux Kernel versions before 5.12-rc8, emphasizing the importance of updating to the fixed version.

Exploitation Mechanism

The vulnerability can be exploited by an attacker with network service privileges, leading to unauthorized privilege escalation.

Mitigation and Prevention

Discover the necessary steps to mitigate and prevent the CVE-2021-23133 vulnerability.

Immediate Steps to Take

Ensure that the issue is addressed by updating the Linux kernel to version 5.12-rc8 or a patched version to prevent exploitation.

Long-Term Security Practices

Incorporate secure coding practices, regular system updates, and monitoring to enhance overall system security.

Patching and Updates

Regularly check for security advisories and apply patches promptly to protect the system from known vulnerabilities.