CVE-2018-5873 : Security Advisory and Response

A problem was identified in the __ns_get_path function located in fs/nsfs.c within the Linux kernel prior to version 4.11. The issue arises from a race condition during file access, which can result in a Use After Free scenario. This vulnerability is present in all Android versions developed by CAF, utilizing the Linux kernel (including Android for MSM, Firefox OS for MSM, and QRD Android) released before the security patch level of 2018-07-05.

Understanding CVE-2018-5873

This CVE-2018-5873 vulnerability affects Qualcomm, Inc.'s Android for MSM, Firefox OS for MSM, and QRD Android.

What is CVE-2018-5873?

CVE-2018-5873 is a Use After Free vulnerability in the Linux kernel before version 4.11, impacting various Android releases developed by CAF using the Linux kernel.

The Impact of CVE-2018-5873

This vulnerability can lead to a Use After Free condition, potentially allowing attackers to execute arbitrary code or cause a denial of service on affected systems.

Technical Details of CVE-2018-5873

This section provides detailed technical information about the CVE-2018-5873 vulnerability.

Vulnerability Description

The vulnerability is due to a race condition in the __ns_get_path function in fs/nsfs.c, allowing for a Use After Free scenario during file access.

Affected Systems and Versions

Vendor: Qualcomm, Inc.
Products: Android for MSM, Firefox OS for MSM, QRD Android
Affected Versions: All Android releases from CAF using the Linux kernel

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating file access operations to trigger the Use After Free condition.

Mitigation and Prevention

Protecting systems from CVE-2018-5873 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by Qualcomm or relevant vendors promptly.
Monitor official sources for updates and security advisories.

Long-Term Security Practices

Implement secure coding practices to prevent similar vulnerabilities.
Conduct regular security assessments and audits to identify and address potential risks.

Patching and Updates

Regularly update systems with the latest security patches and firmware releases to mitigate the CVE-2018-5873 vulnerability.