CVE-2018-14775 : What You Need to Know

OpenBSD versions 6.2 and 6.3 are vulnerable to a Local Denial of Service (system crash) due to incorrect access control of I/O ports in the i386 architecture.

Understanding CVE-2018-14775

What is CVE-2018-14775?

The vulnerability in OpenBSD versions 6.2 and 6.3, tracked as CVE-2018-14775, is caused by incorrect I/O port access control in the i386 architecture, specifically in the tss_alloc function in the gdt.c file.

The Impact of CVE-2018-14775

This vulnerability can lead to a Local Denial of Service (system crash) on affected systems running OpenBSD 6.2 and 6.3.

Technical Details of CVE-2018-14775

Vulnerability Description

The tss_alloc function in sys/arch/i386/i386/gdt.c in OpenBSD 6.2 and 6.3 allows for a Local Denial of Service due to incorrect I/O port access control.

Affected Systems and Versions

OpenBSD versions 6.2 and 6.3

Exploitation Mechanism

The vulnerability can be exploited by an attacker to cause a system crash by manipulating I/O ports in the i386 architecture.

Mitigation and Prevention

Immediate Steps to Take

Apply the provided patches for OpenBSD 6.2 and 6.3 to address the vulnerability.
Monitor official sources for any further updates or security advisories.

Long-Term Security Practices

Regularly update and patch all software and systems to prevent known vulnerabilities.
Implement proper access controls and monitoring mechanisms to detect and mitigate similar issues.

Patching and Updates

Install the patches available for OpenBSD 6.2 and 6.3 to fix the incorrect I/O port access control issue.