CVE-2018-1108 : Security Advisory and Response

The Linux kernel's implementation of random seed data has a vulnerability in kernel drivers older than version 4.17-rc1, potentially allowing unauthorized access to seed data during the boot sequence.

Understanding CVE-2018-1108

This CVE involves a weakness in the Linux kernel's handling of random seed data in older kernel driver versions.

What is CVE-2018-1108?

The vulnerability in kernel drivers before version 4.17-rc1 allows certain programs to access seed data prematurely during the boot process.

The Impact of CVE-2018-1108

CVSS Score: 5.9 (Medium Severity)
Attack Vector: Local
Attack Complexity: High
Integrity Impact: High
The vulnerability does not directly impact confidentiality or availability.

Technical Details of CVE-2018-1108

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability arises from the premature access to random seed data by certain programs in older kernel driver versions.

Affected Systems and Versions

Affected Product: Drivers
Affected Vendor: Kernel
Affected Version: kernel 4.17-rc1

Exploitation Mechanism

Unauthorized programs can exploit the vulnerability by accessing seed data before it is fully generated and secure.

Mitigation and Prevention

Protecting systems from CVE-2018-1108 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected systems to kernel version 4.17-rc1 or newer.
Monitor and restrict access to seed data during the boot sequence.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version.
Implement secure boot configurations to prevent unauthorized access to critical system data.

Patching and Updates

Apply security patches provided by the Linux kernel maintainers.