CVE-2020-12652 : Vulnerability Insights and Analysis

A vulnerability in the Linux kernel before version 5.4.14 could allow local users to trigger a race condition, known as a 'double fetch' vulnerability.

Understanding CVE-2020-12652

This CVE identifies a specific issue in the Linux kernel that could potentially be exploited by local users.

What is CVE-2020-12652?

The __mptctl_ioctl function in drivers/message/fusion/mptctl.c in the Linux kernel before 5.4.14 allows local users to hold an incorrect lock during the ioctl operation, leading to a race condition or 'double fetch' vulnerability.

The Impact of CVE-2020-12652

The security impact of this vulnerability is mitigated by the fact that the affected operations are privileged, and root already possesses significant destructive power.

Technical Details of CVE-2020-12652

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from the __mptctl_ioctl function in a specific part of the Linux kernel, enabling local users to exploit a race condition.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: All versions before Linux kernel 5.4.14

Exploitation Mechanism

The vulnerability allows local users to manipulate the lock during the ioctl operation, creating a race condition that could be exploited.

Mitigation and Prevention

Protecting systems from CVE-2020-12652 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply the latest security updates for the Linux kernel to mitigate the vulnerability.
Monitor system logs for any suspicious activities that could indicate exploitation.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access and permissions.
Regularly review and update security configurations to address potential vulnerabilities.

Patching and Updates

Update to Linux kernel version 5.4.14 or later to patch the vulnerability and enhance system security.