CVE-2017-8246 Explained : Impact and Mitigation

CVE-2017-8246, assigned to Qualcomm, Inc., involves a Use-After-Free vulnerability in ALSA PCM Playback Kernel Module affecting various Android releases from CAF using the Linux kernel.

Understanding CVE-2017-8246

This CVE entry highlights a critical security issue in the msm_pcm_playback_close() function within Android releases from CAF.

What is CVE-2017-8246?

The vulnerability arises from improper handling of memory in the ALSA PCM Playback Kernel Module, potentially leading to a dangling pointer.

The Impact of CVE-2017-8246

The vulnerability could be exploited to execute arbitrary code or cause a denial of service by an attacker with local access.

Technical Details of CVE-2017-8246

This section delves into the specifics of the vulnerability.

Vulnerability Description

The msm_pcm_playback_close() function in affected Android releases assigns memory that is later freed without proper sanitization, leading to a dangling pointer.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability allows an attacker to potentially exploit freed memory, leading to unauthorized access or system compromise.

Mitigation and Prevention

Protecting systems from CVE-2017-8246 requires immediate actions and long-term security measures.

Immediate Steps to Take

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

Long-Term Security Practices

Implement secure coding practices to prevent memory-related vulnerabilities.
Conduct regular security assessments and audits to identify and address similar issues.

Patching and Updates

Regularly update software and firmware to mitigate known vulnerabilities and enhance system security.