CVE-2018-19407 : Vulnerability Insights and Analysis

A vulnerability in the Linux kernel allows local users to trigger a denial of service by exploiting a NULL pointer dereference in the vcpu_scan_ioapic function.

Understanding CVE-2018-19407

This CVE involves a flaw in the Linux kernel that can be exploited by local users to cause a denial of service.

What is CVE-2018-19407?

The vulnerability in the Linux kernel (up to version 4.19.2) allows local users to manipulate system calls to trigger a denial of service by causing a NULL pointer dereference and a BUG condition in the vcpu_scan_ioapic function.

The Impact of CVE-2018-19407

The issue arises when the ioapic is not properly initialized, leading to a denial of service condition.

Technical Details of CVE-2018-19407

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vcpu_scan_ioapic function in the Linux kernel through version 4.19.2 allows local users to cause a denial of service via crafted system calls that reach a situation where ioapic is uninitialized.

Affected Systems and Versions

Linux kernel versions up to 4.19.2

Exploitation Mechanism

Local users can exploit the vulnerability by manipulating system calls to trigger a denial of service.

Mitigation and Prevention

Protecting systems from CVE-2018-19407 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches provided by the Linux kernel maintainers.
Monitor for any unusual system behavior that could indicate exploitation.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version.
Implement the principle of least privilege to restrict user access.

Patching and Updates

Stay informed about security advisories and apply patches promptly to mitigate risks.