CVE-2018-12928 : Security Advisory and Response

A vulnerability was found in version 4.15.0 of the Linux kernel involving a NULL pointer dereference in the hfs.ko module's hfs_ext_read_extent function, exploitable when mounting a maliciously crafted hfs filesystem.

Understanding CVE-2018-12928

This CVE entry describes a specific vulnerability in the Linux kernel version 4.15.0.

What is CVE-2018-12928?

CVE-2018-12928 is a vulnerability in the Linux kernel 4.15.0 that allows for a NULL pointer dereference in the hfs.ko module's hfs_ext_read_extent function.

The Impact of CVE-2018-12928

The vulnerability can be exploited by mounting a specially crafted hfs filesystem, potentially leading to a denial of service or arbitrary code execution.

Technical Details of CVE-2018-12928

This section provides more technical insights into the CVE.

Vulnerability Description

A NULL pointer dereference was discovered in hfs_ext_read_extent in hfs.ko in the Linux kernel 4.15.0, triggered during the mounting of a crafted hfs filesystem.

Affected Systems and Versions

Affected Version: 4.15.0 of the Linux kernel
Systems running this specific version are vulnerable to exploitation.

Exploitation Mechanism

The vulnerability can be exploited by mounting a maliciously crafted hfs filesystem, triggering the NULL pointer dereference in the hfs.ko module.

Mitigation and Prevention

Protecting systems from CVE-2018-12928 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply relevant patches and updates provided by the Linux kernel maintainers.
Monitor official sources for security advisories related to this vulnerability.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version to mitigate known vulnerabilities.
Implement secure coding practices to prevent similar NULL pointer dereference issues.
Conduct regular security assessments and audits to identify and address potential vulnerabilities.

Patching and Updates

Stay informed about security patches released by the Linux kernel community.
Promptly apply patches to address the vulnerability and enhance system security.