CVE-2019-18675 : What You Need to Know

A vulnerability has been identified in the Linux kernel up to version 5.3.13, specifically in the cpia2_remap_buffer function within drivers/media/usb/cpia2/cpia2_core.c. This vulnerability involves an Integer Overflow issue that can be exploited by local users with access to /dev/video0, potentially leading to privilege escalation.

Understanding CVE-2019-18675

This CVE pertains to a security issue in the Linux kernel that allows unauthorized acquisition of read and write privileges on kernel physical pages.

What is CVE-2019-18675?

The vulnerability in the cpia2_remap_buffer function in the Linux kernel up to version 5.3.13 allows local users to gain unauthorized access to kernel physical pages.

The Impact of CVE-2019-18675

Exploitation of this vulnerability can result in privilege escalation for local users with access to /dev/video0, potentially compromising system security.

Technical Details of CVE-2019-18675

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability arises due to an Integer Overflow issue in the cpia2_remap_buffer function within drivers/media/usb/cpia2/cpia2_core.c, allowing unauthorized access to kernel physical pages.

Affected Systems and Versions

Linux kernel up to version 5.3.13

Exploitation Mechanism

Local users with access to /dev/video0 can exploit the Integer Overflow issue to gain read and write privileges on kernel physical pages.

Mitigation and Prevention

Protect your system from CVE-2019-18675 with the following steps:

Immediate Steps to Take

Apply relevant patches and updates provided by the Linux kernel maintainers.
Restrict access to /dev/video0 to trusted users only.

Long-Term Security Practices

Regularly monitor and update the Linux kernel to ensure the latest security fixes are in place.
Implement least privilege access controls to limit potential attack surfaces.
Conduct security audits to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security advisories and updates from the Linux kernel community to patch vulnerabilities promptly.